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1995 Jeep Grand Cherokee Laredo
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Joeforsale
Novice
Nov 12, 2009, 7:47 AM
Post #1 of 19
(8993 views)
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1995 Jeep Grand Cherokee Laredo
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1995 Jeep Grand Cherokee Laredo 6-cylinder
Ok, having some serious issues willing to take any advice. Symptoms before Jeep not starting at all: would occasionally die on me while driving or while stopped at light or stop sign. Could normally start it right back up after it died. A few days ago this happened went to start back up and hasn't started since. What has been replaced: distributor cap, rotor, coil, ignition pickup sensor. The Jeep still will not start. It turns over fine while trying to start. Right now my Dad and I are thinking that there must be something wrong with the PCM, but the local Jeep dealer wants us to bring the Jeep in (kind of hard when it won't start and you don't have the money to pay for towing, plus the outrageous price the dealer will charge). If anyone know how we can go about testing the PCM ourselves please let me know, and any tips on other things we can check would be great too. Thanks for reading, and most importantly thanks for your time.
Edit ** There is no spark when testing the coil connection.
(This post was edited by Joeforsale on Nov 12, 2009, 11:36 AM)
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chickenhouse
Enthusiast
Nov 12, 2009, 9:49 AM
Post #2 of 19
(8980 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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I think first off, make sure it is getting fuel. Key on, hear fuel pump running in the tank? Any way you can put a fuel pressure gauge on it?
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Joeforsale
Novice
Nov 12, 2009, 11:38 AM
Post #3 of 19
(8966 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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We are getting a scanner tomorrow from a friend of my dads. I will check later today to see if I can hear the fuel pump when I turn the key on. I'll post back and let you know, thanks.
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Joeforsale
Novice
Nov 12, 2009, 2:03 PM
Post #4 of 19
(8958 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Alright, when I put the key to "on" position there is the sound of the fuel pump engaging.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 12, 2009, 4:13 PM
Post #5 of 19
(8950 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Not sure what the spec is for pressure but if it will even fart with a spray of starting fluid we need to figure out why it's a fuel problem or not. Engines need fuel, spark on time, and compression or no go - that's it in a nut shell.
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chickenhouse
Enthusiast
Nov 12, 2009, 5:47 PM
Post #6 of 19
(8944 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Let us know what you find with the scanner and the reason for no spark at the coil connection.
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Loren Champlain Sr
Veteran
/ Moderator
Nov 12, 2009, 5:49 PM
Post #7 of 19
(8942 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Joe; This is just a 'guess', but it is very common for the crank sensors on these to take a dump. Don't always flag a trouble code, either.
Loren
SW Washington
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Joeforsale
Novice
Nov 12, 2009, 8:46 PM
Post #8 of 19
(8935 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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I have read all your suggestions so far and will definitely be taking them into consideration on Saturday, when we have another stab at it. I'll post back and let you all know how it goes. Thanks.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 13, 2009, 9:19 AM
Post #9 of 19
(8926 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Loren probably has this nailed. Not sure how you are testing for spark - best done at the plug end of a plug not at the coil IMO.
Not sure what you meant back a few post with no spark at coil or how you tested that??
T
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Loren Champlain Sr
Veteran
/ Moderator
Nov 13, 2009, 4:26 PM
Post #10 of 19
(8916 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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LOL..Thanks for the confidence, but just a guess.
Loren
SW Washington
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Joeforsale
Novice
Nov 13, 2009, 10:24 PM
Post #11 of 19
(8908 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Spark was tested putting screw driver in the end of plug running from coil, and holding screw driver 1/4" away from ground while attempting to start Jeep. Shocked the s**t out of my Dad during one of the cranks, so if you attempt this keep your teeth clenched  After it shocked my Dad it ran fine for a day, and now when we tested it there is no spark coming out. My Dad already mentioned the crank shaft sensor so more than likely we will be leaning that way on Saturday, but we're going to see what the scanner kicks out. Thanks again.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 13, 2009, 11:23 PM
Post #12 of 19
(8907 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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There are in line spark testers that would go to a spark plug. Coil alone isn't enough as it might not send spark to plugs. It then if no go needs to be known if on time. So if you know you have spark and fuel and nothing works we keep working on it.
Once in a while I've had plugs so gas soaked they ground out inside without making a spark! That about always after too many failed tries and engine flooded. Not all plugs will just air dry either if left alone for even a whole day or more and need replacement or glowing hot from like a regular propane torch holding them but plug wire end with pliers. Just the electrodes! Watch out if you ever try that - they get hot and stay hot for a while. Let air cool as needed if you ever try that,
T
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Joeforsale
Novice
Nov 14, 2009, 8:44 PM
Post #14 of 19
(8883 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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First and foremost, thanks for all the advice. The scanner did us no good because we found out that 1995 Jeeps do not have a hook-up for scanners and you can only use the "on,off,on,off,on" starter method to display any codes. We got codes 11 and 12, put a new crank shaft sensor in and it starts and runs fine for the time being. I'm not very mechanically savvy so won't be posting any help but I will definitely lead people to this forum if they ever have any car issues. Thanks again for everybody's help. Your time is most appreciated.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 14, 2009, 8:51 PM
Post #15 of 19
(8882 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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The standard now is OBDII which started in model year 1996. Glad your up and running,
T
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Joeforsale
Novice
Nov 15, 2009, 8:55 AM
Post #17 of 19
(8871 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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OK sorry, it is OBD I compliant we just did not have the hook-up for it.
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Hammer Time
Ultimate Carjunky
/ Moderator
May 27, 2011, 6:08 AM
Post #18 of 19
(7386 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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This is a 2 year old thread. if you need help, please start a new question. This one is locked now.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 27, 2011, 6:11 AM
Post #19 of 19
(7380 views)
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Re: 1995 Jeep Grand Cherokee Laredo
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Hey - you are tossing parts at this - wrong approach and waste of bucks,
T
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