Question about 2000 Jeep Grand Cherokee
I have seen jeep TPS - throttle position sensors cause a surge like you describe , but not with injector circuit code's . The PCM - engine computer controls the injectors by supplying a PWM - pulse width modulation ground . Checking the electrical circuits for those injector's would be the thing to do . Do you know how to test electrical circuit's ? Plus checking the drivers (transistors ) inside the PCM should be done . Could be a wiring or computer problem or even those injectors could be failing .
How to Check Fuel Injector Resistance with Multimeter
How to test fuel injector circuit with basic tools open control wire
Posted on Jan 01, 2018
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Posted on Jan 02, 2017
Check intake gasket and vecuum hoses near intake runner #4. To do this spray carb cleaner at parting line between manifold and block while engine is running. If leaking rpm will dramatically change. A leak will lean out that cyl and cause misfire
Posted on Feb 26, 2009
SOURCE: jeep will just die going down doad or will not start, had a code that read camchaft sensor replaced that still the same, now i have a code that reads injector circuit malfunction i mhave changed fuel
That sounds like a bad grounding wire, or possible PCM malfunction. Check all engine wiring harness locations for any corrosion or damage. let me know what engine type you have, and I could look up the wiring schematics
Posted on Apr 25, 2009
tinyp78 has it right if it has the check engine light on then don't run it as it will damage the catalytic converter, as well if the injector fails and exlodes the parts can go into engine and damage a valve or cylinder.
Posted on Jul 05, 2009
Could be a vacuum issue or the modulator..
The modulator tells it when to shift and is controlled by vacuum presure..
Check all vacuum lines that rum from the tranie for cracks, spits etc..
it could also be a sensor..
Hope this helps !!
Please rate me good ;o)
Posted on Jul 11, 2009
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