Question about 1986 Jeep Comanche

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86' jeep comanche computer as seen need pic in place

Hi my comanche went over a small bump and the engine stalled out, it cranks-fires once in while-does not run-my mechanic said check the plug going into the p/c -the housing is unsecured a little and all i can do is feel around feel like the plug is covered by a metal cover over the plug holding it in place -but there is a 3-4"blue and white female plug hanging along side the housing is this normal? what is that plug for-a tach? ro does it have anything to do do with my de-lima

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SOURCE: 93 Jeep Grand Cherokee Won't start

Are you getting spark from coil wire when cranking? If so, check the cap & rotor. If not, the most common failure is the crank sensor. If you have a 4,0, you can find it on the drivers side of the bellhousing, in line with the flywheel, just where it's annoying to work on. There is a test you can make, but I don't have the specific test values or the correct terminals to check. (you can find that info in any half decent manual.
Good luck

Posted on Jan 08, 2009

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SOURCE: Need diagram of vacuum system for 1988 jeep comanche pick-up 6 cy

Haynes manual has a diagram. Main important hookups are to power brake booster, fuel pressure regulator and map sensor. also need a connection to a/c controls inside drivers compartment and evap system canister. will also need connection to egr valve solenoid if you have one. as well as pcv on valve cover (or ccv which replaces pcv on some)

Posted on Mar 04, 2009

motor1258
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SOURCE: Jeep needs to crank twice to start + rich gas smells once started

That code PO455 is indicating that you have a fuel vapor leak somewhere in the system. I'd check from purge canister back taking a close look at all the vapor hose to the tank. If all that check out, purge solenoid & canister would be my next area to check. That's probably what your smelling , so it might be easier than you think to sniff out the source.

Posted on May 18, 2009

  • 323 Answers

SOURCE: 89 Jeep Comanche Fuel Pump. Won't start after running great.

Replace the crankshaft position sensor

Posted on Jun 17, 2009

  • 144 Answers

SOURCE: need wiring diagram for 1988 jeep comanche 4x4 6

check the solenoid on the starter it powers the ign for starting then switches to run when you let off key,either the solenoid is bad or a wire to the solenoid has come unhooked and sometime they have an in line fuse which can blow.

Posted on Sep 27, 2009

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