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broken computer?


 
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jekwone
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Joined: 09 Jul 2005

PostPosted: Sat Jul 09, 2005 4:27 am    Post subject: broken computer? Reply with quote

I've got a 93 grand cherokee and it was giving me a hard time turning over. Took it to the shop got a new crank indicator, but it didn't really work AND afterwards (like hours) the car started to miss pretty bad. I took it back and after a few days they told me my cpu was bad and that it blew up my old and two new crank indicators, and that was why it was missing. Does this sound legit to anyone? I mean why would it start missing AFTER they had it if it was my cpu
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Sat Jul 09, 2005 4:47 am    Post subject: Reply with quote

not impossible but not very likely either...

If you have them do it , ask for all the old parts that they are having you pay for.. (IE crank position sensors and ECU.. ) if they really do the work they should have the old parts.. If you have to pay for the part take the old one with you.. And have them show you the new one..

Honestly an ECU is about $200 and available at Autozone.. And Crank position sensors are are about $75 and same thing...Autozone...

But if you dont know what you are doing I guess its better to leave it in the shop..

As long as they gaurantee their work and give you the old parts that they change .. I think you will be alright..


I hate suggesting that anyone go to a mechanic... rofl

Oh and next time ....Before you pay them take it for a test drive... If its not fixed ....Dont pay them...

Carl
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Unless you include the sawzall work..

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brada7
Member


Joined: 02 Mar 2005
Location: Jonesboro Arkansas

PostPosted: Sat Jul 09, 2005 10:54 am    Post subject: Reply with quote

I had a similar problem a few years ago. My jeep wouldnt start randomly. Traced the problem to the lack of power feeding to the fuel pump. Wasent the pump, relays, or anything. for some reason it just wouldnt send the fuel pump any power. It would never die on me it, if it was running it was fine but if you shut it off...... cross your fingers before you try to start it. Being an electrical problem I took it to a local shop thats known throughout town for good electrical troublshooting. And they ended up replacing the crankshaft pos. sensor and the computer to get it fixed. When I asked was it the crank sensor or the computer? They seemed to no know what to say. Also they thought that the connection between the crank sensor and the wiring harness was shorting so they cut it off and soldered it together Evil or Very Mad All I know is has been fine eversince then. But ever since they did that, I have to run premium fuel or I get detonation. I'm assuming that crank sensor helps the computer control the timming.
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Brad Lackey
04' grand cherokee
4.7l
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Steve35897
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Joined: 12 Jul 2005
Location: Johnstown, Colorado

PostPosted: Thu Jul 14, 2005 8:04 pm    Post subject: Reply with quote

My guess is that they somehow didn't get the new crank sensor installed in the correct position and it is a few degrees advanced.
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