Question about Dodge Intrepid

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MY ENGINE IS AUTOMATICALLY REVING ITSELF WHILE IN A PARKED POSITION I CHECKED WITH A AUTOZONE COMPUTER AND IT SAID CODE P1391 MISFIRE INTERMINTANT LOSS OF CMP OR CKP .WHAT SHOULD I DO AND HOW BAD IS THE PROBLEM?

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  • danc41 Jul 27, 2009

    I DO NOT HAVE A WARRANTY ON MY CAR AS I OWN IT

  • yadayada
    yadayada May 11, 2010

    I own my cars and it has a warranty, so what does that have to do with it???

  • yadayada
    yadayada May 11, 2010

    take it to the dealer.

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Problem not bad at all, its either ya cam or crank sensor, when 1 goes bad, it throws the other one off

Posted on Aug 02, 2009

  • hotboy48135 Aug 02, 2009

    problem not bad at all, its either ya cam or crank sensor, when 1 goes bad, it throws the other one off

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My 2000 nissan maxima se has a misfire i can hear it through the exhaust and when im driving. say i put on the gas hard and let off, it will make a loud kinda of reving noise. it had 300k miles on it when...


The most likely problem is with the signals the pcm is getting from the crankshaft or camhaft position sensors. The problem could be the sensor itself, the tone ring that spins next to the sensor, or the wiring. Inspect the wiring and connectors, tone rings, and sensor installation carefully. If visual looks good, there are some tests you can run at the link below.

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Repair Guides Components Systems Crankshaft Position Sensor AutoZone com

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Ford p1391 trouble code


According to engine-codes.com the code is for a problem with the glow plug circuit on bank one. That circuit would need to be checked.

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Im getting code P01391 but don't know what it is?


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03 ponitac grand am would not start 2 different times, it starts about 10 minutes later, it rolls over but doesn't start. Maybe a fuel pump or crank sensor I don't know any ideas?


Failure-to-start scenarios are often an issue of "fuel or spark?"

To check fuel pump, install a fuel pressure gauge on the Shrader valve connector on the
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One good source of diagnostic info is your car's computer - commect an OBD-II code
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posting 100s of possible error codes, any number of which would/could implicate a fuel
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error code meaning
--------------- -------------
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P0108 MAP (manifold absolute pressure) sensor - high input (to computer)
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P0171 fuel system lean
P0172 fuel system rich
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P0202 fuel injector 2 control circuit malfunction
P0203 fuel injector 3 control circuit malfunction
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P0301 cylinder 1 misfire detected
P0302 cylinder 2 misfire detected
P0303 cylinder 3 misfire detected
P0304 cylinder 4 misfire detected
P0336 CPS (crankshaft position sensor) range/performance
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Possible bad parts:
TP (throttle position) sensor - Duralast TPS172 $51.99 at www.autozone.com

Fuel pressure regulator:
www.autozone.com/autozone/regairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8036e816

Fuel Pump:
www.autozone.com/autozone/repairinfo/repairguide/repairGuideContect.jsp?pageId=0996b43f8036e7c7

Fuel Filter:
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Fuel rail (supply manifold) and fuel injectors:
www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8036e7a0

Could also be dying fuel pump relay - Duralast 19264 $14.99 at www.autozone.com.
I don't work for Autozone.com - just convenient info for some cars.

Autozone.com will expect you to register (free) to access their repair guide database (which has pictures - especially helpful for finding sensors).

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Helpful TIP: IF you replace either the Sensor MAKE SURE you use approved replacement OEM parts. Some after market Sensors have been found to be faulty and/or will fail.

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