RPM fluctuation after 30 min of driving
09-29-2016, 07:54 PM
#1
RPM fluctuation after 30 min of driving After about 30 minutes of driving, while at idle, I'm getting RPM fluctuation between 1000 and 700 rpms. This only happens after the car is been driven for 30 minutes or so. What could cause this? Fuel pressure stays constant at 58 psi, vacuum gauge looks good.
09-29-2016, 11:31 PM
#2
Possibly the MAF but not sure on this.
10-01-2016, 09:20 AM
#5
Could be a failing 02 sensor.....you will not get a code yet. You must look at it on a scanner. Gotta see how they are switching after its at operating temp.
Could be a dirty IAT sensor also....hit it with some MAF cleaner spray or Sea Foam spray.
Dirty fuel filter can do it too.
TPS sensor could be worn out in a certain spot and wigging it out......
Even a bad battery with a small short can cause that......get a test done.
.
Could be a dirty IAT sensor also....hit it with some MAF cleaner spray or Sea Foam spray.
Dirty fuel filter can do it too.
TPS sensor could be worn out in a certain spot and wigging it out......
Even a bad battery with a small short can cause that......get a test done.
.