Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2002 Dodge Status R/T 3.0 Liter, manual transmission, K&N cold air intake system.
The current codes displayed are p0102 and p0421.
Low idle when cold (wants to stall), but good when warm, except shifting is not smooth.
If I jab the accelerator pedal, it's not properly responsive.
The car runs pretty well otherwise, although perhaps slight loss of power.
I suspect the MAF sensor to be the issue.
I've been searching unsuccessfully for substantial information regarding the cleaning of Karman Vortex sensors. Apparently this type of sensor can be damaged by cleaning, although I've read that many have successfully cleaned theirs.
I suspect my 2002 Dodge Stratus R/T (Mitsubishi) has a Karman Vortex sensor, but am unable to determine for sure, and am therefore reluctant to try cleaning it without being certain that it is malfunctioning.
The prior owner installed a K&N cold air intake system, which I suspect to be contributing to sensor issues.
If anyone knowledgeable reads this, I would GREATLY appreciate any helpful feedback!
check signal, power and ground... three wire maf. signal wire voltage is on-off 5v-0v(test with engine running). If no reading, KOEO unplug connector to maf, signal voltage should be 5v. If not 5v, you have a wiring problem. KOEO power wire is 5v. Ground should be no more than 0.1 volts.
K&N air filters are known to cause MAF problems.
"an open mind let's knowledge flow in and wisdom flow out for a man who has neither never listens to those who have both".
Being wrong doesn't bother me, it's being right and not understanding why that does
Before doing anything else the first thing is put the standard air intake and filter back on and check the mesh screen on the MAF sensor is in place. MAF sensors get thrown a curved ball if anything before the airflows into the MAF is changed. If the velocity profile is altered the MAF sensor will not be in the correct position or have the correct calibration to measure how much air is going into the engine.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
Topic Author
