Misfire? Cylinder Not working? Whats the Deal?

[triggerx]

Alright so im working on my 90 awd tsi, and for the longest the check engine would come on and off out of know where. And when It did the car would act like its driving on three cylinders.

So I still drove it for awhile, like a month later, the check engine light comes on, but now it doesnt go away.
Its a code 41, which I believe is injector, and the injector all the way to the left closest to the passenger side (4?)seems like its not getting proper voltage.

All the other injectors are fine, so I really dont think its my injector thats causing the problem.

So if its not the injectors and its not the resistor box, this leads me to believe either a wire is messed up or my ecu. And I hope its not my ecu. How often do these ecus go out?

 

[evileclipse909]

Quite often. pull it and see if the caps are leaking. If its damaged I'd sugest sending it to ecmtuning to have it repared. They have super good customer service and work pretty fast. It took less than 2 weeks to send them the ecu, have them repare it and send it back.

 

[triggerx]

ugh, I hope its not the ecu. Anyway to prevent this leaking from happening?

 

[triggerx]

Turned out to be my ecu, for those who have aq smilar problem.

Charteristics were
-Car running as if on 3 cylinders
-pulsating idle due to injector 4 not activating right.
-low voltage from injector 4 wire
-car becomes noticebly slower.
-There was continuity from injector plug wire to the ecu
-Resistance from injector resistance box is in spec.

Solution-
New Ecu, maybe it was due to failing injector driver.


Also my car was apparently running on a mirage/galant ecu this whole time./

 

[sinistercrumb]

my check engine light comes off and on occasionally, but it doesn't run different when it does. Recently though, that weird light beside my check engine, {the one that looks like a monument or something.} came on and my car idles at like 500rpms and chokes a little bit when im at idle.

 

[triggerx]

You must be talking about your coolant. Check your resevoir.