over the past few months my V6 has been getting noticeably worse MPG and is harder to start up when warm (it always starts up when it's warm but it'll take a couple tries)
on a cold start it fires right up and runs good until it gets warmed up
I've checked all over for vacuum leaks and can't find any, I've also sprayed brake clean on every vacuum line and around the intake but none made a difference
I checked the fuel pressure with the vac line on and off the FPR and it's in spec and I don't smell gas from the FPR vac line
tested the coolant temp sensor resistance when it's cold and hot and it's in spec as well
would a partially stuck open EGR cause it to run rich and idle rough?
I don't believe the 88 V6 has an air temp sensor so I'm not sure what else to check that would cause this other than the ECU possibly going bad
Yeah, you'll need the '88 engine harness from a Cat/Bird 5.0, as well as fuel lines (or make your own)
It's better if you have a complete V8 car, but the engine harness alone is enough to get you where you want to be.
While not on topic, the stock V6 brakes are barely adequate for the 3.8, so I'd recommend something more modern if you've not done that already.
I might still have a set of V8 fuel lines from when I was messing with my Sport. All other parts are long gone, save for a TC hood and some smaller stuff. Where are you? Close to North Missouri? I'd make you a hell of a deal on whatever Bird parts I have left. Can't remember what all I have, but it's a fair amount of stuff. Really rather not hassle with shipping the bigger parts, but wouldn't rule it out, either.
