ECU test help please
05-16-2023, 08:33 PM
#1
ECU test help please
Guys I have been battling with this C230 forever, it has the no throttle response, engine just revvs, have had so much diag time and thrown parts at it. After tons of testing the mechanic came up with the ECU being bad, I sent the ECU to a place to module experts, they said the transistor was bad, did a whole replacement ECU for a bunch of money and said it would be plug and play, got the new ECU back, same thing, car starts and just revvs up and down with no throttle response, put it drives it clears for a second let me foot off the break it just bucks. Have had wiring harness tested, I need to know how to test the data coming from the ECU to the throttle, have tried multiple throttle bodys, new tps always the same problem, car only has 40K miles was garaged it’s hole life, 1 owner snowbird car.
05-17-2023, 12:25 PM
#2
Member
How long is a long time and when did you acquire the vehicle?
If it's that old, with that low mileage and been sitting a long time the first place my head would go is the fuel system. Did you do a fuel pressure test and how many tanks of gas have you gone through so far? The ethanol can draw water from the tank if sitting long enough and this can mess up fuel injectors.
If it's that old, with that low mileage and been sitting a long time the first place my head would go is the fuel system. Did you do a fuel pressure test and how many tanks of gas have you gone through so far? The ethanol can draw water from the tank if sitting long enough and this can mess up fuel injectors.
