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
157,555

James answered 4 years ago

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

Mark helpful

GuruJH5F4 answered 4 years ago

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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