Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Good to hear it's not nightmaring you any longer too bad we couldn't get it 100% straightened out but I guess sometimes you just don't have the time oh well on to the next one!
Lol yeah man.. i will have a vw t4 transporter to work on soon.. wiring in a mess and I dont think I have seen a vehicle with that much wiring lol.. I can already tell its going to give me a hard time
Hey guys.. I have encountered another problem with another MP9 engine and i have a question, thought I would ask here instead of posting a new thread since its the same system. The problem now was with the "known good" car that belongs to my friend which I ran a few tests on when I was trying to figure out my issue on the troublesome car..
My friend removed the gearbox to change the clutch in his car, when he put everything back on the car did not want to start, it would run with a starter fluid though..
So i went over to his place and had a look, the only thing it was missing, was injector pulse. It had +12v to the injectors, spark, 5v ref, good grounds etc.. no blown fuses either (fuse box built into the dash). The next day, just a coincidence he found 2 maxi fuses hidden next to the battery behind the headlight, they are of high amperage, one was 40A not sure of the other.. he removed the fuse, sand papered the terminals and put it back and the car started up.
How does a fuse control the ground side switched ignition pulse? The wiring diagram i have which i posted here in 1 of the earlier posts, shows the injector ground wires go directly to the ecu. How does the fuse come into the picture..?
Hey ash it doesn't directly however it can indirectly by supplying power to something like the ignition switch that sounds power to the ecu or something along those lines
Just got feedback from this customer, I referred him to one of the best auto electricians in my province/state.
They repaired the vehicle, problem came back 2 days later. (I dont know what work they have done)
They tried all they could and could not permanently fix the issue.
The vehicle is coming back to me this week, and I honestly have no clue on what could possibly be wrong..
Yeah, so I have the car back now.. the guy at the other shop does not want to tell me any more than "we just tried 2.0 injectors and it didnt work out".
The problem again:
* the car starts and revs up, but only idles for like 5seconds with the map sensor plugged in. It will drive but jerk continously. Also stalls and backfires when revving up.
* starts, idles, revs up smooth, drives well with the sensor plugged in, but loads of black smoke under acceleration.
I just dont have faith in this ecu.. Im gonna try it on a friends car on friday and see how his car behaves. If u have any other suggestions please let me know
The problem again:
* the car starts and revs up, but only idles for like 5seconds with the map sensor plugged in. It will drive but jerk continously. Also stalls and backfires when revving up.
* starts, idles, revs up smooth, drives well with the sensor plugged in, but loads of black smoke under acceleration.
Well bummer that's not going to help I wanted to see the ECU readings . I suspect the tuner didn't solve your map circuit when they chiped . it it may be worth trying your ECU in another vehicle and see if it acts the same
Yeah lol I have that feeling aswell, I will try it on the other vehicle.. Im also curious to open this ecu up and have a look inside it, but I am abit scared of that dodgy idea
