If I were in your shoes, and I'm glad I'm not... I would first ask, what's changed? The motor was running fine until...
I would start checking all that wiring that was "tucked". A 20+ year old, heat soaked harness doesn't like to be manhandled.
I got a G60 in my caddy that i just love to drive. Its a solid motor that i have not had any issues with. I took the car down to do a wire tuck. Only thing disconnected from the truck was the intercooler piping from mechanicals. I got the truck back on the road and it drives fine, does not idle poorly, and boosts just fine as it did before. However, when i try to do full throttle the truck feels like it hits a wall. The feeling is as if i am holding the paddle only half way down. I can feel the motor trying to break throgh the sluggishenss but just cannot.
I know this is kind of vague description, its hard figuring a car out with out vag com that i am used to. I dont know if poor timing can contribute to this. I have not messed with it. Any input from the pro's would be appreciated.
the only two things that have changed is that i have replaced the bad cracked pigtails from the injector harness and blue temp sensor harness.
Ill have the timing checked, other than that, if if the car ran one way with cracked harness, and i replaced it with new one, i would assume the ecu would need some time to adjust.
I'm not 100% on this so, hopefully someone else will chime in. I don't think the G60 ECU has the capacity to "learn" anything. In other words, when you turn it off, there's no stored data that'll be implemented when it's started again.
If you've checked conductivity from the sensor connector back to the ECU connector then, scratch that off the list.
My next check would be the full throttle switch. You said its falling on its face under load? Do you have a wide band? I'm guessing it's sweeping mad lean when you floor it.
How old is your fuel pump?
How old is your fuel filter?
The blue coolant temp sensors are kind of hit and miss these days. I wouldn't call that good just because you put a new one in the hole.
When you say the wiring was "tucked", do you mean everything was disconnected and routed through the frame rails? If so, make sure all the grounds are clean and tight.
Your last post popped up while I was writing mine. Glad to hear it's going again.
Last edited by mateok; 10-11-2012 at 01:03 PM.
It seems to be running well. I have done a conductivity test on all my wiring before splicing them back together, so they check out.
I have not checked the throttle switch yet, but wont hurt to do so. The car has a narrowband. Fuel pump and fuel filter are fairly new. Have less than 3K miles on them. I ran my wiring through the fender rail and covered it all using conduit tubing. All grounds have been confirmed.
As i said, I just drove it and it seems to be acting just the way it was originally, so thats a good sign. There is no harm in checking back on all the small things to make sure everything is spot on, but as you mentioned, I would like to have a confirmation if the ECU is adaptive?