Car stalls.. Rpm shoot up and down.. Car jerks..

Asked by becca Dec 11, 2019 at 08:49 PM about the 2007 Mercury Milan V6 Premier

Question type: Maintenance & Repair

Ok so it started this about a week ago, happened
for a few days while raining then it ran fine till two
days ago when it rained again! It has no check
engin lights. It stalls while at light's unless i put in
neural and sometimes stalls while driving. But
starts right back up. Will jerk real bad right before
stalling or when taking off. Please help its driving
me crazy????

2 Answers

157,855

Sounds like the IAC (Idle Air Control) valve is bad. For testing purposes unplug it and start the engine. You should have a very low, but steady idle. If so, replace the IAC. Hope that helps! Jim

07 mercury Milan. Speedometer goes up and down while driving, pressing the gas it doesn’t really wanna go. Then it does but starts right back up.

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