Vehicle losses power when ac on or at stop
Asked by Dadw2kidsstranded Jul 27, 2019 at 07:43 PM about the 2003 Chevrolet Blazer LS 2-Door RWD
Question type: Maintenance & Repair
Vehicle has brand new battery starter fuel
pump assembly fuel filter finally started
now when at at car starts shaking unless
it's in park and loses power while a/c
running does ok on highway but on street
have to turn it off at each stop and shift
into park sounds like misfiring what am i
missing. Last time you suggested check
fuel pressure there was none so changed
filter and pump
5 Answers
It sounds like your RPMs dip too low at idle. Try do an idle relearn and see if that solves it.
Dadw2kidsstranded answered 5 years ago
How do i relearn it? Never did that before it's new to me. Also if that's not it could it be crank position sensor? I want to get this done today we been stick for 2 weeks were supposed to be in San Antonio Texas got stranded in phoenix Arizona and in a shelter.
Just search “idle relearn” for your specific car. It will pop right up. In my experience, a failed crank sensor would keep the car from starting.
Dadw2kidsstranded answered 5 years ago
At first car wouldn't start. I replaced starter battery fuel pump and filter. Cleaned distributor cap rotor cap. Finally started but idles to high. When i come to light or stop it loses power more when i have a/c on. Have to turn it off before i stop and put car in nuetral or park so it stays running. Watched videos on relearn with turning key on and of push on gas starting and timing each thing. Tried about 5 but there a few where purple use computer. Don't have one. N ur i did get codes for crank position sensor and misfire and vacuum? Out if money out if options me and my kids having to stay in homeless shelter because we we're moving to San Antonio Texas and Arizonato hot
Vacuum leaks will cause misfires so those can be related. Check all the hoses for cracks and tears. Also, leaky valve cover gasket will throw misfire and vacuum codes.
