Hi all, my daily post. I just finished fixing boost leaks and while at it I used contact cleaner to clean the MAF (just like I did to my Ford F150 awhile back) and installed a new air filter. I got the car out of the driveway and drove half a block without issue, then all hell broke loose. CEL came on, ABS and PSM warnings, then drive to workshop warning. Car started to buck and I pulled over and turned it off. I walked home and after 10 minutes of cursing I started it again. Car starts fine but then CEL and rough idle. I'd prefer not to drive it back home until I have an idea of what is up. I don't have a durametric.

 

I managed to get it into my garage at limp speed as it would buck if I gave it gas and let out the clutch. While idling in the garage the CEL stays on and ABS PSM messages alternate. Applying a consistent bit of gas makes the engine rev up slightly and then back down about once per second
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SOLVED. ODBII reader noted codes P1502 Fuel Pump Relay Final Stage, P0638 Throttle Actuator Control Range/Performance - Bank 1 and code P1510 IACV fault. Research pointed to the throttle body. Tore it apart and found throttle body was stuck part way open. I must have disturbed some dirt when cleaning it and it got caught in the valve. Cleaned out, cleared the codes, did the one minute ignition ON TB reset procedure and car starts and idles great. Will take it for a spin in the AM to see if all is good.

 

Glad we could help...LOL. Drive safe.

 

Yes, it was a rather one-sided conversation, but sometimes writing everything down organizes the mind for problem solving. If I get feedback, that's great too. Maybe someone else will learn something from this.