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autonurse
User
Oct 10, 2013, 2:26 PM
Post #1 of 20
(2148 views)
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 I have a 1996 cavalier with 175,000 miles recently it would crank but not start. I assessed that their was no spark from any of the plug wires, the battery was fully charged. I changed the coil packs and ignition module with a used one and also the Crankshaft position sensor. I plugged my scanner in to the port but it would not link up with the vehicle. I checked all the fuses especially the cigarette lighter fuse because this one was blown one time and it would detect the pcm either. I think the pcm may be bad. at this point I had it towed to a garage to find out. but in the future is their anyway I can check to be more certain(didnt want to replace something else that may not b the problem)? thanks
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 10, 2013, 4:25 PM
Post #2 of 20
(2140 views)
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Does the check engine light come on for bulb check when the key is first turned on?
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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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autonurse
User
Oct 14, 2013, 5:27 AM
Post #3 of 20
(2104 views)
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I didnt really notice but I think it did
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 14, 2013, 6:25 AM
Post #4 of 20
(2102 views)
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How about you check and see............
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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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autonurse
User
Oct 18, 2013, 7:01 AM
Post #5 of 20
(2080 views)
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sorry it took a while to get back to you. havent had a chance to look at car. but did and no the check engine light did not come on
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 18, 2013, 7:24 AM
Post #6 of 20
(2077 views)
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That means the computer is not even powering up. Test all your fuses using a test light with the key on.
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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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autonurse
User
Oct 18, 2013, 1:46 PM
Post #7 of 20
(2055 views)
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did that and they all were good, question what if the check engine light had come on?
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 18, 2013, 1:50 PM
Post #8 of 20
(2053 views)
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It would mean the computer is working.
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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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autonurse
User
Oct 21, 2013, 10:59 AM
Post #9 of 20
(2029 views)
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thank you
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autonurse
User
Nov 7, 2013, 8:05 AM
Post #10 of 20
(1972 views)
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I ended up towing the car to my local repair shop i use when I am unable to fix something or dont the the equipment to do so. they determined the PCM was bad and blew due to frayed wires on the harness, they replaced the Pcm and fixed the wires(I didnot feel comfortable messing with the PCM) they called me telling me none of the warning lights on the dash will now go off. they sent it to an authorized GM dealership to reprogram the PCM but the problem still exists. any suggestions as to the issue?? thanks 
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 7, 2013, 9:43 AM
Post #11 of 20
(1969 views)
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Apparently something they did. I have no idea.
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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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autonurse
User
Nov 7, 2013, 12:54 PM
Post #12 of 20
(1965 views)
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thank you
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autonurse
User
Nov 14, 2013, 11:52 AM
Post #13 of 20
(1940 views)
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after talking to the dealership. they tried another pcm and had that one "reflashed" or reprogrammed. the dash warning lights still remain on. they have no idea why. they state its not in the pcm at all. bottom line it is an older car and I dont want to pay alot of $ to have them try to find the problem. I am going to drive it as is and in the very near future get another car. I would like to see if I can find the problem like is it a short in the wiring? and any idea where I should start? thank you
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 14, 2013, 1:31 PM
Post #14 of 20
(1936 views)
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Were the lights on before they changed the PCM?
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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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autonurse
User
Nov 15, 2013, 7:16 AM
Post #15 of 20
(1925 views)
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no they werent the car was operating ok and no warning lights were on at all that is what is baffling
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autonurse
User
Nov 15, 2013, 7:19 AM
Post #16 of 20
(1924 views)
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they did say that the cause for the pcm failing in the first place was that the wiring harness was frayed and arcing.
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 15, 2013, 7:44 AM
Post #17 of 20
(1922 views)
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The lights were not on before and now they repaired the harness and changed the computer and all the lights are on. It needs to go right back to them to resolve the issue.
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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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autonurse
User
Nov 15, 2013, 8:13 AM
Post #18 of 20
(1919 views)
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yes that was my thought also but they are telling me they took it to a GM dealership and they dont know why either and it could cost me several hours in labor to find the issue and may never find it. to me, the car is old with high miles and not worth that kind of money but a small part feels like they should solve the issue at their expense being the problem didnt exhist until the pcm was replaced thank you for your time
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Hammer Time
Ultimate Carjunky
/ Moderator
Nov 15, 2013, 8:40 AM
Post #19 of 20
(1917 views)
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That's a cop out because they don't know what they are doing,.
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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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autonurse
User
Nov 15, 2013, 8:43 AM
Post #20 of 20
(1915 views)
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kinda got same opinion or that they dont want to be bothered, they know i do most of my own work and only bring something to them that i am either not comfortable fixing or just dont have the means to reasonably do so. I am not a "regular" there even though my last 4 vehicles i purchased from them thank you for your opinions and time!
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