Question about 1993 Jeep Grand Cherokee
Engine cranks, but no fire, pulled out a spark plug, no spark either, it run fine one day, went to start it up the next day, run for a few seconds then died, any suggestions, get tired. Thanks anyone
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.
Posted on Jan 08, 2009
I did the following in the meantime. Fitted a new distributor cab and rotor. I opened up the timing cover and check the steady tensioner (it is not spring loaded). The timing marks indicate it did not jump a tooth. The timing chain is still healthy.
I fit new spark plugs and took out the fuel pump. Low fuel pressure. I started it up with a universal fuel pump that push 2.8 bar. It is to low though. The black abrated stuff out of the fuel pump might indicate that the fuel pump failed. It seems one only need to take it slow with this model. Scratch slowly and you get ontop of the problem.
The map sensor tested and found working okay.
Posted on Apr 11, 2009
Change the pickup coil in the distributor,then start the vehical .
Posted on Feb 21, 2009
Just cycle the key on, off, on ,off, then leave on. engine light will start flashing a couple of times after a few seconds. count them. will be once every second then a space then will start again. this will be the first 2 digit code. if all ok will flash 55 to indicate its done
Posted on Jan 13, 2009
Ok gang, this worked for me! I was at whits end and remembered what an instructor at radar school...circa 1977 told us. "when you have tried everything logical and nothing will work, give it a good whack!" I got under the fuel tank and slugged it a couple times, shes been running for a day now:) I now know if it does **** out its the fuel pump or a stuck switch in it!
GIVE THE FUEL TANK A GOOD THUMP A COUPLE TIMES RIGHT UNDER THE FUEL PUMP
Posted on Jan 11, 2009
Replace crank sensor electro-magnet that create sparks to the coil, some car get worn-out espicially when the vihicle is more than ten years.
Posted on Apr 07, 2009
You've probably fixed this by now, but if not, why not check the ignition coil? I've had ignition coils in my '94 Grand Cherokee go bad on me twice (160,000 miles on odometer). It cranked over strong (i.e., fully charged battery and new starter) but would not fire. There was fuel at the fuel rail but no spark at the plugs. Confirmed 12 volts at the ignition coil input. Pulled the ignition coil and checked the resistance. The primary winding was 1 ohm (within spec) but the secondary was 9.7 kohms (out of spec, the spec is 10kohms to 14kohms, approx.). I put in a new coil and it fired right up.
Posted on Mar 28, 2009
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Posted on Jan 02, 2017
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