Question about 1985 Pontiac Fiero
Dirty intake throttle valve and air bypass idle speed control motor. ttry the following.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Mar 15, 2009
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Aug 02, 2013 | 1995 Honda Accord
Aug 08, 2011 | 2000 Chevrolet Camaro
Feb 06, 2011 | 2001 Ford Windstar
Dec 03, 2009 | 1998 Subaru Legacy
Aug 14, 2009 | 1999 Nissan Pathfinder
May 28, 2009 | 1986 Nissan Pickup 4WD 1986
May 18, 2009 | 1988 Toyota 4Runner
Jan 27, 2018 | 1985 Pontiac Fiero
Dec 22, 2017 | 1985 Pontiac Fiero
680 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: