Efi upgrade

[Pezzer]

Hi, has anyone upgraded their 4.2 petrol carbie motor using the 4.2 efi system, as I am about to do this?

[Dirk Diggler]

I've collected all the parts to do the same to mine also.. I'll be using a haltech ecu however.

[GQ TANK]

Im also about to do mine - only need the electric fuel pump. I have seen a write up elese where

The guy who done it stripped the loom - and only connected the bits he needed.

The advantage what I have read is that you get a bit better power and fuel economy - he was saving 2 litre 100k

[Pezzer]

I have a gq efi with gas and I will be moving the lot across to the Maverick.

[Sanouske]

Ive seen one which had he swap. Was fairly painless apart from getting the loom through the firewall. Other then that its bolt up and away you go. Fuel pump was an inline jobbie.

[Bloodyaussie]

I will be doing this conversion with Irish after he has moved into his new house..... I will force him to do it I should say!!

We will be putting in a whole engine as his is very tired and he got one cheap.. should be interesting job!¬!

[Pezzer]

Yeh I have 172000kms on mine and 232000 on the donor.

[Pezzer]

Started the change over today, has anyone removed the plenium chamber if so can it be removed complete from the head ?

[Parksy]

These pics will give you an idea of where the bolts are. As GSC mentioned, some are a bitch to get to, and a half inch drive socket won't fit. Will probably need a 3/8 drive socket, as the diameter of the actual socket is smaller. You will understand what I mean when you get to it.
http://img.photobucket.com/albums/v92/Pakas/A3188D78-9D1E-41B5-B01D-89BEFB05E1F9-3666-00000273F105ED11.jpg
http://img.photobucket.com/albums/v92/Pakas/A1663186-D14C-49C5-9C2B-E28F62B43CAE-3666-00000273EB37D9B3.jpg

[GQ TANK]

Is it worth doing the mod?

What are the gains - power? Economy?


My carby tb42s is running well (recently put a kit though the carby and pertonix)

What fuel pump can be used?

[Pezzer]

I see you have left your injectors plugged in.

[Parksy]

I see you have left your injectors plugged in.

Yep, didn't need to touch them. Disconnected the 3 plugs at the front of the manifold and all the looms stay with the manifold.

[Pezzer]

If you don't split the chambeR can the whole unit be Removed by just removing the intake manifold to head bolts?

[Pezzer]

I believe the fuel economy is quite significant ie 2ltrs less over 100 Kim's, a and the torque climbs up., I run gas and on efi switching between fuel to gas is just that, no pre purging to empty the carby of fuel.

[Pezzer]

This motor will eventually be supercharged.

[Parksy]

If you don't split the chambeR can the whole unit be Removed by just removing the intake manifold to head bolts?

Yes that's what I did. Much easier to do this as opposed to splitting the plenum chamber in situ. Some of the bolts are hard to get to, but it's not impossible. 12mm combination spanner and a socket set with a uni joint and you shouldn't have any dramas.

[Pezzer]

Ok just get my sons Ford escort dramas sorted and back into it.

[GQ TANK]

What fuel pump are you using?

Details price etc would be handy

Are you stripping the loom ?

[Pezzer]

My intention is to use the Nissan unit in the donor patrol pulling all mechanicals before sorting electrics.

[Uncle Festa]

Haven't upgrade from one to the other but have had both carby and now have an EFI model. Much better to drive/response. A good mod to also do is to fit electric rad fans and although reliability might be debatable, saves a couple more neddies and gives a little bit more response. I fitted 2 fans from a '97 Subaru Leonie ( I think) Got from a wrecker and although fairly old at least they are made in Japan and not Chinese crap. The only ones you seem to be able to buy aftermarket are just that, Chinese crap and I won't touch them. I reckon fans out of a 2000 and on Commodore might be a good option but need to check they will fit depth wise between front of yr donk and radiator. Also will need some sort of shroud to improve their efficiency and a high quality temp sensor/relay to control them. Also need to make sure you use good size cable and good terminals all well/double insulated as obviously gets very hot around there. I had a warning light on my dash with the previous GQ, so I had an indication that the fans should now be on and running as is up to temperature where some cooling is needed. These fans I have had in use/on the car and previous one for over 10 years now and only issue is the bushes have gotten a bit squeaky/noisy a couple of times and just required some lube.
Apart from loom, ECU and fuel pump, you will also need a speed sensor for the ECU and I am suspecting that a carby model doesn't have one and maybe it will run ok without it, but you might have to consider it. Its mounted on gearbox to the speedo if I am not mistaken. Anyway, loike what you are doing good luck with yr upgrade. I am planning to put a 4.8 into a GQ soon. Which should be brilliant.

[Pezzer]

finally plenium and intake manifold out, the gas fitter put the gas line nipples to close to the inlet manifold bolts only 1/4 turns at a time its going to be a nightmare refitting. Need a beer and a kind word to say it will all be worth it.

[wakerider]

I heard that you might have to change the fuel tank also because the fuel injection requires more tank pressure. I know in early commodores to change to efi, you had to change the tanks.

[Pezzer]

Okay the rain has finally stopped so back into it. I now have all the gas mechanicals and looms out of the donor car, also all of the EFI mechanicals, very difficult to access the inlet manifold bolts just 1/4 turns whoever Gassed the car placed the gas injection nipples almost directly behind the bolts. I have exchange the Dizzy and coil for the donors electronic ignition. I have had to swap rocker covers also, where is the petrol pump located on EFI models? I think that it is going to be easier to pull the whole loom out. There is a black canister behind the left headlight should this be swapped over?

[Parksy]

Pump is located inside the fuel tank. Pull up the carpet in the cargo area and there will be a panel held down with 4 10mm bolts. With this panel removed, disconnect the fuel pressure and return hoses and the electrical connector and screws and the whole lot can be removed.

The black canister behind the headlight is used to absorb fuel vapours from the fuel tank. These days tanks don't vent to atmosphere, they vent into these carbon filled canisters, then when your engine is on, the engine consumes the vapours within the canister. Will need it if you want to pass road worthy.

[Pezzer]

I have a canister on the Maverick but it is a smaller unit.

[Pezzer]

Hopefully the fuel pump is an easy swap, wouldn't be the same pump would it?

[Parksy]

I doubt it will be the same pump. Efi pumps need to pump the fuel to about 40psi, where as a carby pump only needs to just move the fuel to fill the carby float. Doesn't run anywhere near as high.

[Pezzer]

Okay found the Maverick pump its a mechanical type below the alternator so tomorrow I will move this across to the donor patrol and remove the electric pump ready to fit in the Maverick.I have now removed the inlet manifold complete with carby and Gas system from the Maverick, and only have the switch wires left in both cars, these will be out tomorrow. I managed to save 1 inlet manifold gasket, where is the best place to get a replacement staying away from Nissan.

The only problem so far is a heater hose spigot fitted to the back of the block on the EFI motor, 1 main heater hose and a smaller feed hose are attached to this the carby block does no have this. Does anyone know the size spanner required and is there a knack to releasing these. Don't really want to use a flame in there.:049:

[Pezzer]

okay only had 2 hours on it today, so disconnected the last of the LPG switches and wiring from both vehicles, and removed the mechanical pump and fitted it to the donor patrol. This is when I noticed that the carby vehicle has a larger diameter fuel feed line, I will have to remove the EFI pump tomorrow and possible the lines.

[Pezzer]

This is the spigot that I am having trouble cracking the nut.

[Parksy]

That pipe needs replacing! Contact patrolapart and get a new one. About $30 I believe. Only advice I can give is lots of inox around the thread as well as inside the pipe. When you turn the nut, the entire pipe turns with it. Not sure if this info will help you, just good to know.

[Pezzer]

Bonus only $20 at the moment, thanks Parksy.

[Dirk Diggler]

Looking good mate!

I just picked up my distributor for my conversion yesterday, bloke give me a ecm for free too! Happy days.. Just need to sort out a fuel pump...

[Pezzer]

Thanks, whilst the engine bay is relatively clear I think it's best to get all the looms sorted, of course a little bit more involved with a swap over and requiring both vehicles to be running at the end.Next move is to view the Nissan EFi tank in situ and make plans to transfer, although my hitches are the feed line diameters and varying lengths between Lwb ans Swb.
Side note the Patrol has dual piston front calipers where as the Maverick has single, should I upgrade?

[Pezzer]

Okay at the engine bay firewall with EFI loom complete, which way through firewall, into car or out in to engine bay? It seems both ways there is a problem, in the pic it shows a fuse unit that sits on the outside of the guard relay housing, this is as small as I can get it and does not look like it will pass through into the car. What to do.

[Pezzer]

Has anyone unplugged the plugs around the gearbox, if so how do you access them? I was going to cut and resplice onto the Maverick loom but the colours are different ie: Maverick White/Green/Grey/Black/ Blue and a Yellow with blue trace.
Patrol White/ Black/light blue/Blue/greeny Blue/ dark blue.

[Pezzer]

Impatience is a virtue, got back under the auto box reached up between drive shaft an gearbox and tried to follow the looms along the top of the box. They run through 4 folded steel guides which I was able to fold back and allow the looms to drop unplugged the first from the front driver side and the remaining 2 are located at the rear of the box passenger side one above the other. once these plugs are released the main battery lead / starter /alternator fuel metering and of course gearbox loom can be removed from the car. Possibly a win is that the 3 remaining leads appear to be the same in both vehicles, I will double check tomorrow.

[Pezzer]

Okay, moved main heater hoses over on each vehicle, replaced steel pipe spigot in rear of patrol with Maverick short spigot and the new branch spigot from Patrolapart into the Maverick ( had to remove Auto dipstick to turn in),so now these hoses will fit onto the LPG Heat chambers once refitted into the vehicles after the loom has been run. The coil and points dizzy now fitted to the Patrol and the electronic ignition and dizzy now fitted to Maverick. The branch pipe and hose setup that runs under the Plenium chamber shows signs of corrosion so this part is to be replaced as access now is easy. To keep in with the upgrade I decided to swap the alternators this also involved the short looms to be swapped (10 mins), today I will finish installing these short looms by connecting up the auto gearbox plugs (3 on this loom), after which will leave a further 3 plugs to be fitted back up when the main loom goes in.
The looms:
Efi runs both side of the engine and down both sides to the rear of the vehicle crossing 2x one behind the dash and one under the mat beneath the front seats.
Carby runs around the engine bay to along the drivers side to the rear of the vehicle crossing 2x one behind dash and one under mat beneath the front seats.

[Pezzer]

whilst under the car thought that I would checkout the fuel pump, patrol has an aftermarket long range tank fitted, its a snug fit so I might leave alone and get an aftermarket fuel pump, any suggestions please?

[Pezzer]

All mechanicals done on Patrol and gas system fitted, so now to the Maverick to remove the entire loom, here we go again.

[Parksy]

Nice work pezzer. Hope both vehicles start first go.
How did you go removing the branch spigot from the efi system? I've got a spare lying around, will probably replace mine in the near future.

[Pezzer]

Once I had the replacement I cut the original so I could use a 24mm socket and bar and it cracked instantly, to refit the new one I had to remove the bolt securing the Auto gearbox dip stick and twist it out of the way. To get a good seal I wrapped pink gas ptfe tape around the threads, job well done. I have now pulled the dash from the Maverick, much easier after removing the Patrol dash learnt a lot. tomorrow the complete loom will be removed from the Maverick. Still need an Idea for an external fuel pump as I do not want to pull the long range tank out to access the original.

[Pezzer]

Wiring loom transfers complete started plugging up so far only non compatible plug is 1 of the front door plugs both sides, and Patrol has an extra sensor in the radiator.

[Pezzer]

Plug up continues, the steering pump on the Patrol has a plug on the side where as the Maverick does not unsure of what this does maybe a level sensor. I will connect the battery before putting the main dash frame and front grille back and check what I can all the parts to fire up the now carby Patrol are in place except for the wiring from the gas tank of which is also being swapped.
Hoped that someone would of posted me info on an external pump to use with the Efi on the Maverick, no seems to have commented on this forum for a while.

[Parksy]

Sorry pezzer, have been reading but not posting. Unfortunately I don't have an answer for the external fuel pump setup you're after. My power steering pump has that sensor you speak of, but the wires have broken off. Hasn't had any effect on running performance, might be just as you suggested, a level sensor.

[Pezzer]

Oh that's promising news as I do not want to swap them over. Went to hook up the throttle cable on the carby but found that the efi uses a longer one so I had to swap them over, easy with the dash out. I think that I will use the front door looms out of the Patrol saves cut and soldering, I will have to make a bracket to suit the ECU and locate it in the passenger foot well as was its position in the Patrol. I might look at dropping the Long range tanks on both vehicles, just hope the one in the Maverick has a cut out for the ion tank pump?

[Pezzer]

Okay today dropped both lpg tanks, and now have access to the rear looms. I managed to feed both looms back and over the rear left hand wheel on top of the chassis only to hit the next problem on both vehicles., The patrol has a lead going across to the Long Range fuel tank I believe this is to the relocated in tank fuel pump of which I am hunting for. BUT whom ever installed the tank used a nut and bolt (14mm) through the chassis with no access to hold the bolt with a spanner etc, so tomorrow off to a Fab shop and get someone to heat a spanner up and bend it in the hope that this will hold the bolt from spinning. Oh yes had to drop the Towbar to access the lpg tank cradle.
The Maverick, how handy is the 50mm lift to get access great. BUT this lpg tank has been plumbed up with copper pipe, and has been run behind the rear chassis cab mount, this in turn prevents the loom with plugs being pulled through, so now I need the free a stubborn nut on the body mount and raise the cab with the jack whilst the loom is removed. The next step is to strip the fuel pump leads from the Patrol loom and unite it with the Maverick loom and then reinstall both looms, The Maverick Long Range fuel tank is yet to be dropped, just hope it has an access for the pump. I will then refit the gas tanks, whilst swapping filler necks as at the moment the Maverick has an under body filler.

[Pezzer]

Just a quick note wiring crossing the chassis in front of rear diff is not to the tank as first thought its to the rear sway bar release unit. Bothe fuel tanks on each vehicle have the same aperture for pump and sender.

[Pezzer]

Today re making the rear looms shortening the Lwb and lengthening the shorty. There were 3 differences in the looms firstly the Efi loom has pump and sender in the same plug Maverick sender only, Efi loom has sway bar Disconnect ( still uncertain wether to move this complete unit over as there is nothing hindering access to it with the tanks out etc. Lastly the rear Efi lefthand light loom (not bumper lights) has only a 6 pin plug and a 4 pin plug where the Maverick has an 8 pin, on checking the colour codes I found that the 6 pin had a Purple with white trace where the Maverick uses Pink so I decided to colour match with the Pink from the 4 pin plug and have left the Purple wire along the new loom just in case. I have re run all wiring from the Lpg tanks to the heaters (the Maverick only had a hand valve to shut off the tank, whereas the Patrol has an auto cutoff), hence the swap.

[Pezzer]

Next problem the Patrol tank with the in tank pump has an extension piece attached to the tank to allow for the extra 50mm of depth on the unit. My intension is to remake the pump and sender unit shorter to fit into the Maverick tank with out having to have the tank welded. The Patrol fuel tank has be re fitted with the Maverick sender unit and relocated back in position under the vehicle, best chance to re run the new made up rear loom whilst the Lpg tank is out.

[Pezzer]

Well today I cut and shut the Efi Pump sender unit by 68mm and managed to fit it snuggly into the Maverick fuel tank, fitted new Fuel injection hoses and rust protected the top and upper sides of the tank before refitting to vehicle. Tomorrow I will be hooking up the battery on the Patrol to check the looms whilst there is still access if all goes well I will fire up the Patrol. The Lpg will be fitted to the Maverick during the day and as the parts have now arrived from Patrolapart (water hoses and pipes that sit under the Plenium chamber]I will start to fit the Efi inlet manifold up on to the Maverick could be on the Home run.

[Pezzer]

Pulled passenger door loom out of Patrol and swapped with Maverick loom, fitted Lpg tank to Maverick just need a short gas line made to connect up. Reinstalled the blower fan and steel dash frame into Patrol, front passenger side now all together just centre dash console and drivers area to go and fit new gas switch and swap drivers door loom removing the rear window wiring as not required in the Shorty. Then its just connect the filler nozzle from the maverick onto the Patrol pour in some fuel hook up the battery and fingers crossed!!!!!!!!!!!.

[Pezzer]

Finally first car back together. will run up tomorrow.

[Parksy]

Excellent news pezzer! Hope it starts for ya.

[Pezzer]

Patrol battery on, all working as should be, cranked it over all good just need fuel to run. I will rewire the stereo up tomorrow and that vehicle is done, I will swap the dual piston callipers with the Mavericks single piston type next weekend I would like to know though is it a straight swap as I already have 17 inch rims so clearance should not be an issue.
All the dash and centre console are back in the Maverick I will make good the inside before putting the Efi manifold etc back as I am outside and they keep saying showers. Hoping to fire the Maverick up around Thursday.:xxxx:

[Pezzer]

Quick note the instrument clusters are set up with a 6 pin 3rd plug on the Maverick compared with an eight pin on the Patrol, so decided to just swap over.

[Pezzer]

Hi I have just got all the efi gear back and found a set of pipes and hoses with a sensor attached that obviously fits up under the inlet manifold. I have taken many pics whilst dismantling but missed this section so could someone point a camera up under the inlet manifold and snap a few pics to help me out ASAP.

[Parksy]

Hey pezzer, unfortunately that thing, which I think is called an air valve is an absolute nightmare to reach unless you pull the manifold off. Here's some pics from when I had my manifold removed. Hope they help you out.
http://img.photobucket.com/albums/v92/Pakas/795BCF2F-BFE7-4856-BE49-202D35FA8828-3666-00000273DA19DCCF.jpg
http://img.photobucket.com/albums/v92/Pakas/17D2D3F4-6E7C-4E39-8AED-E6E89B706D3B-11962-000008B51146A757.jpg
http://img.photobucket.com/albums/v92/Pakas/38D7A83F-476A-4B53-9DF2-E6D06BC7356C-11962-000008B56918AB9B.jpg
http://img.photobucket.com/albums/v92/Pakas/19738944-7098-4273-B6FC-CC0FFE275A0B-11962-000008B557442C94.jpg
http://img.photobucket.com/albums/v92/Pakas/EDA71BE9-D8AD-4766-869C-B4E22A0BC69E-11962-000008B540DE5BB9.jpg
http://img.photobucket.com/albums/v92/Pakas/FD76A9C5-F91C-4D7A-95B9-81D29048DEF8-11962-000008B5295FC63C.jpg

[Parksy]

If you need pics of where the two hoses plumb to, I'll run out and grab a couple when I can. Hopefully you have an electrical plug without a home floating around.

[Pezzer]

That's the piece, pic of where the pipes go would see me finish the refit, thanks Parksy.

[Pezzer]

All the hoses are now hooked up and all plugs are connected only the air box and ancillaries to go. I keep wondering wether to swap over the power steering pump just so the loom can be plugged up to it, I think that I will recheck what is involved tomorrow. What I need to know now is where to hook the Moreys Head Lube hose too, after swapping the Lpg tanks I decided to sand blast and re powder coat the stone guard, glad I did as the underside looks really good. Hopefully I will swap the brake callipers over Fri/Sat

[Pezzer]

32370Quick check this morning and found that the only part on the power steering to be swapped is the flow pipe as this has the fitting attached to it that plugs into the loom, so easier to remove both lines together.

[Pezzer]

Found that the Patrol Radiator had a second sender in the top, whereas the Maverick did not , so pulled the radiator and getting a fixing fitted to the radiator tomorrow and will have all under bonnet swap over completed. Hope fully if all goes well turn key Friday.

[Pezzer]

At last.

1 petrol (carbie) / Lpg Patrol.

1 Petrol (Efi) / Lpg Maverick.

[mudnut]

Top job, Pezzer.