Andyh (23rd June 2015)
I finally got back outside last night to swap out the Tacho units again, and i still have a problem, the tacho will not read and jumps around all over the place without the engine running, so im starting to think there is something wrong with the wiring..
I am going to have to re-think this as i cannot have 3 faulty tachos.
1st tacho - Sits on zero and wont read any revs under 3000
2nd tacho - jumped around and spiked would not read (Engine Not Running)
3rd tacho - jumps around then settles around 1500 rpm (Engine Not running) Then with motor started reads increases in revs but only from 1500rpm, so idle speed is like 2500rpm
Out of interest i then put the petrol tacho back in, this sits on zero and reads with motor running, but only above 1200rpm, then reads normally, the needle then hits zero at idle..
LOL who would have thought two wires can cause so much pain.. lol
She'll be right mate
it's a GQ
Sounds to me more like a faulty sender....... If I still had the other engine here I could have ripped it out for you.
See if you can at least loan one... some shops charge a re- stocking fee for using parts for testing?
I am not sure how to test the sender you have in there at the moment as that is for the electrical nuts??? maybe try messaging Yendor?
Andyh (24th June 2015)
What you're describing with the petrol tacho is what the TB45 conversions seem to experience when they connect the TD42 sensor to the petrol tacho. Nothing below 1000-1500 then shows normally.
John
2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body
Andyh (24th June 2015)
I thought the same BA, so i did change the sender and had the same result, also thus eliminating the sender.
I have another idea, i may run the two wires up from the sender and connect them to crimped eyelets and secure the eyelets behind the relevant screws behind the tacho, thus bypassing the plug.
At the very least i t will eliminate any bad solder joints in the wire connections in the plug.. I will give it a crack.
20150525_142659.jpg
Yes the petrol tacho thing has thrown me a bit because i was under the impression it wouldn't work at all.. lol
I will solve it eventually... lol
Last edited by Andyh; 24th June 2015 at 10:14 AM.
She'll be right mate
it's a GQ
I bypassed the plug last night, I attached the 2 eyelets to the wires and then fixed them directly to the PCB of the tacho where it screws into place.
This also didn’t work, on all three tachos i have. so I am at a total loss… I must just have 3 RS tachos, I will now go to Patrolapart for them to fit a working tacho, I am not prepared to spend any more time on it, i must have had the dash apart and the cluster out 30 times now, I will be really disappointed with Niss4x4 if they have supplied tachos that don’t work !
I will just run with the petrol tacho for now as that reads over 1100 rpms so at least that's something, better than nothing
She'll be right mate
it's a GQ
correct me if i'm wrong but dosn't the td42 tacho pick up from the alternator ? and the petrol from the dizzy/computer? have you got the pick up from the right place ?
i had to replace the speedo and could only get a petrol cluster... so i tested it whole b4 i pulled it apart, tacho didn't move at all. but thats a petrol tacho in a diesel.
if its worth doin its worth over doin
Hi Garret,
The EFI tacho it picks up signal from the ignition coil through the ECU, but i have bypassed all of that and run 2 new wires from the pick up point on the TD42 motor, then i changed the tacho gauge/ cluster to suit a diesel motor... The tachos work on the same principles i guess, but having wired it up correctly with the required equipment to tried and tested methods with no good result, i am now at the limit of my ability so i will have to put it in to patrolapart and see what the outcome is from there.
She'll be right mate
it's a GQ
As a last ditch attempt to solve my tacho problems, does anyone on here know if the tacho from a series II GQ patrol 2.8 is the same as a TD42 Series II tacho, the two tachos i got supplied from the wreckers are out of 2.8's THIS IS MY LAST IDEA ! . LOL
Help... Please.. Anyone.. lol
She'll be right mate
it's a GQ
Hey mate I can't help at all but just letting you know I have been reading this whole thread and following your little journey...
Stick with it mate, you are too far to throw it in now haha!
Andyh (26th June 2015), Bloodyaussie (25th June 2015), Rossco (25th June 2015)