Question about Jeep Liberty
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Posted on Jan 02, 2017
SOURCE: hesitation at 40mph and 50 mph.
A pop and hesitation is likely a backfire. The hesitation around 40 and 50 would be in keeping with that theory. There are several reasons you might be getting backfires and hesitation. If your ECM is adjusting the engine to run too rich this could happen. Misfiring might be occuring. Timing could be out. But one of the most likely is a restricted exhaust, likely due to a plugged, damaged or worn out catalytic converter. In some cases the converter may be bad enough to be giving you some performance problems, but not yet quite bad enough to signal an error. A vacuum test can help confirm whether this is exhaust related.
Posted on Feb 07, 2009
Check your EGR valve hose for leaks/cracks etc, remove wiring connector & clean all contacts. Remove battery terminals before you start, but make sure you don't have to recode your anti-theft, or code your stereo, without proper info ready at hand. If your not sure, leave them on, but make sure key is off. Try again now, and see if code returns, if it does, get a new gasket for EGR valve, remove it & clean it thoroughly with throttle body spray cleaner, and re-install. It should be located close to throttle body, with 2 bolts attaching it to intake manifold. Near TP sensor & IAC motor. Try again, but see if you can get codes erased prior to, or immediately after, and see what happens.
Posted on Apr 26, 2009
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