Last post on Jun 01, 2013 at 11:25 PM
You are in the Jeep Cherokee and Jeep Grand Cherokee
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Jeep Grand Cherokee, Jeep, Electrical, SUV
#8 of 160 1993 jeep Grand cherokee PCM?
Oct 24, 2007 (6:41 am)
I also was told my PCM was out so I bought a used one and it still didn't fix the no start problem. I have spark to the top of the distributor but not to the plugs. I thought it was the cap and rotor so I replaced them too and to no avail it still wont start? I did use and aftermarket cap/rotor so I got a OEM set. Any ideas? I took it to the dealer and they said the cam/crankshaft sensors were working. I was just going to throw money at it until it starts. I love my Jeep and wont let it die on me.
Please help me?
#9 of 160 Re: 1993 jeep Grand cherokee PCM? [jeffwtuttle]
Oct 24, 2007 (2:19 pm)
if you have spark to top of distributor cap but none out remove cap have some one turn engine over and look see if roter is in fact turning
#10 of 160 trouble starting g.cherokee
Oct 25, 2007 (3:45 pm)
key has to be left on for a while till some thing clicks then it starts
#11 of 160 Re: 1993 jeep Grand cherokee PCM? [tuggajb]
Nov 13, 2007 (10:39 pm)
I did check to make sure that the rotor was turning and the distrbutor was moving correctly. I am just getting frustrated at all the dead ends? The dealer said it was a PCM and I replaced it but it still did the same thing? They put on the paperwork that they checked the coil,CPS, and the camshaft position sensor and said it was fine. another option I was thinking about was to have my PCM tested or rebuilt.? I guess from what I have resurched so for that Borg Warner re builds them? This way if there is nothing wrong with the pcm I could take it back to the dealership and get my money back for there wrong diagnoses?
Any help here is great!
thanks in advance!
#12 of 160 Re: 1993 jeep Grand cherokee PCM? [jeffwtuttle]
Nov 14, 2007 (4:27 am)
Sounds like the cam shaft position sensor - located below rotor. Easy to replace on newer engines & NAPA / AutoZone etc part...
#13 of 160 Re: 1993 jeep Grand cherokee PCM? [lunghd]
Nov 14, 2007 (7:11 am)
The dealer said and also posted on the bill that the camshaft sensor was good.? Should I replace it just out of elimanating that fron the equation?
#14 of 160 Re: 1993 jeep Grand cherokee PCM? [jeffwtuttle]
Nov 17, 2007 (12:41 pm)
Any Ideas on what to do next? I would like to get my Jeep back on the road! Any help here would be great! Thanks
#15 of 160 Re: 1993 jeep Grand cherokee PCM? [jeffwtuttle]
Nov 17, 2007 (2:37 pm)
if you get spark to the dis you should get spark out no matter what position cam is in so if you remove spark plug and ground the center electrod to the engine it should spark when some one turns the engine over if it does then you can check that firing order is right
to check remove number 1ne spark plug put your finger on the spark plug hole and have some one turn over engine when you start to feel pressure on your finger stop turning over engine and then move it with fan belt to get to top dead center
remove dis cap and see if roter is pointing to where number 1ne plug wire is if so
try this stuff and get back to me
#16 of 160 Re: 1993 jeep Grand cherokee PCM? [tuggajb]
Nov 17, 2007 (4:13 pm)
I checked for spark after the distributor cap and firing order but it still won't fire off. Could a weak coil cause a poor spark, subsequently not getting enough spark to the plugs???
#17 of 160 Re: 1993 jeep Grand cherokee PCM? [jeffwtuttle]
Nov 18, 2007 (4:38 pm)
were you getting any spark at plug (should be a good blue white color)