Hi, has anyone upgraded their 4.2 petrol carbie motor using the 4.2 efi system, as I am about to do this?
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Hi, has anyone upgraded their 4.2 petrol carbie motor using the 4.2 efi system, as I am about to do this?
I've collected all the parts to do the same to mine also.. I'll be using a haltech ecu however.
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
I have a gq efi with gas and I will be moving the lot across to the Maverick.
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.
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!¬!
Yeh I have 172000kms on mine and 232000 on the donor.
Started the change over today, has anyone removed the plenium chamber if so can it be removed complete from the head ?
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/v9...73F105ED11.jpg
http://img.photobucket.com/albums/v9...73EB37D9B3.jpg
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?
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.Quote:
Originally Posted by Pezzer
If you don't split the chambeR can the whole unit be Removed by just removing the intake manifold to head bolts?
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.
This motor will eventually be supercharged.
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.Quote:
Originally Posted by Pezzer
Ok just get my sons Ford escort dramas sorted and back into it.
What fuel pump are you using?
Details price etc would be handy
Are you stripping the loom ?
My intention is to use the Nissan unit in the donor patrol pulling all mechanicals before sorting electrics.
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.
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.
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.
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?
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.
I have a canister on the Maverick but it is a smaller unit.
Hopefully the fuel pump is an easy swap, wouldn't be the same pump would it?
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.
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:
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.
This is the spigot that I am having trouble cracking the nut.
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.
Bonus only $20 at the moment, thanks Parksy.
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...
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?
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.
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.
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.
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.
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?
All mechanicals done on Patrol and gas system fitted, so now to the Maverick to remove the entire loom, here we go again.