Question about Jeep Cherokee
The car cuts off on acceleration
Wow another no year car post. are you kidding?? and no engine option stated, and is an engine question.
2.5L , 4.0L or bigger? im clueless.
parked or moving, flat ground or hills or both. ? it cuts.????
all fuses good?
Check engine light "CEL" out running, no ? then scan it.
report all DTC errors here. (do not interpret them, post them)
your posta forms many issues as one, they are not. (we hope?)
cuts off (is this engine stalls,misfires, bogs or hesitation only) ???????
VSS, who said vss is bad, if the PCM said it , then ITS bad or disconnected. (vss = vehical speed sensor,) location varies by year and engine and tranny options.
a/T malfunction, who or what said that? PCM? TCM? or seat of pants?
did you just pull this engine then put it back in?????history??
when was the last time this car was daily driver, last month or year?
tell more get more, lots more,and for sure year, and engine option.
Posted on Feb 11, 2014
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Posted on Jan 02, 2017
SOURCE: EGR Flow and Knock sensor 1
The EGR valve allows a percentage of exhaust gas back into the engine during part throttle driving conditions. The exhaust gas enters the combustion process and cools the charge down slightly which lowers the emissions.
The EGR flow malfunction is usually rectified by removing the EGR valve and cleaning out the valve itself and the port(s) on the intake where it was sat, which have probably become narrowed due to all the deposits. You need to use a piece of wire to get right into the ports and clean them right out. The valve is connected to both the intake manifold and the exhaust, it is round and will have a vacuum pipe to it. It will either be mounted directly on the intake manifold, or linked to it via a hose, probably metal, and it will be linked to the exhaust via a hose, probably metal.
The knock sensor listens for engine knock, usually caused by incomplete combustion or over advanced ignition timing, and retards the ignition timing to counteract the knock.
You very highly likely have a faulty sensor, but check the wiring first. To suss the problem properly you would need to have alive scan carried out.
Knock sensors are usually located under the intake manifold on these cars and are a complete pain to get to. You'll probably need a universal joint type of affair to get it off. They held on with one bolt.
Very best regards
Posted on Jun 14, 2008
SOURCE: knock sensor replacement
Turn ignition off. Disconnect knock sensor 3
pin harness connector. Locate knock sensor, on cyli
On Optima 2.7L engine, sensors are located on both
sides of cylinder block. . Remove knock
sensor from cylinder block. To install, reverse rem
Posted on Mar 19, 2010
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