Quote:
Originally Posted by TimGFL
I changed the TPS and fuel filter over the weekend, and no change in symptoms, so you may be 100% correct. I went to the pull-it yard, and not a single 5VZ-FE to be found.
The only code I'm getting is P0505 (idle air control), but I didn't think the IAC had anything to do with throttle aside from idle, which is why I've been chasing down the other things (and because a new IAC is $200+ lol)
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If your IAC is stuck but the ecm thinks it's open then the air/fuel calculations will be off and that may be what you're seeing with the rpm related break up. Just a theory on that part. I always recommend trouble shooting/fixing what you have the code for first before moving on to other non-dtc issues. You never know what is being caused by what with vehicles.
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