If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Dead computer - can it be rebuilt? - need advice
Hi all,
I've got a pretty much stock 95YJ with around 140,000 miles on it. The other day, as I was driving, the Jeep turned itself off. It didn't stall out, just shut down. The battery had juice and I had a half tank of gas. I tried to re-start but all it would do is crank over and over - nothing ever caught. I took it to a repairman and I was told the computer is dead. I'm presented with the option to have the computer sent out for rebuilding (its estimated at about $700). Can the computer be rebuilt? Does this sound legit? I've got to give the dude an answer soon as to what to do, and would like to hear from more knowledgable people. Thanks -Art |
Ads |
#2
|
|||
|
|||
The most common, and it's 'really' common cause for that is just a dirty
connection on the CPS on the bell housing. The plug and socket sit right on top of the exhaust manifold and corrode easy. A good spray with an electronic contact cleaner fixes them. Another very common one that causes the same symptoms is a dead body ground strap. It goes from the rear of the head to the firewall and when they quit, it just shuts down the computer. The last one is a bolt above the dipstick with some small black wires on it. This is the computer sensor ground tag. The main computers almost never fail. It happens for sure, just not often. Even just unplugging the CPS and plugging it back in will usually get a start. If you do this and it fires up, you have found the trouble. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Artur Jorge Duque wrote: > > Hi all, > I've got a pretty much stock 95YJ with around 140,000 miles on it. The > other day, as I was driving, the Jeep turned itself off. It didn't stall > out, just shut down. The battery had juice and I had a half tank of gas. > I tried to re-start but all it would do is crank over and over - nothing > ever caught. > > I took it to a repairman and I was told the computer is dead. I'm > presented with the option to have the computer sent out for rebuilding > (its estimated at about $700). > > Can the computer be rebuilt? Does this sound legit? I've got to give the > dude an answer soon as to what to do, and would like to hear from more > knowledgable people. > > Thanks > > -Art |
#3
|
|||
|
|||
Mike Romain wrote:
> The most common, and it's 'really' common cause for that is just a dirty > connection on the CPS on the bell housing. The plug and socket sit > right on top of the exhaust manifold and corrode easy. A good spray > with an electronic contact cleaner fixes them. > > Another very common one that causes the same symptoms is a dead body > ground strap. It goes from the rear of the head to the firewall and > when they quit, it just shuts down the computer. > > The last one is a bolt above the dipstick with some small black wires on > it. This is the computer sensor ground tag. > > The main computers almost never fail. It happens for sure, just not > often. > > Even just unplugging the CPS and plugging it back in will usually get a > start. If you do this and it fires up, you have found the trouble. To add to what Mike said, a re manufactured ECU is a lot cheaper than $700. A quick check of http://www.ecudirect.com shows a price of $250, and since they rarely fail I would imagine one could be had from a junk yard for much less. They are simple to replace but connectors and fuses should be checked first. -- jeff |
#4
|
|||
|
|||
Did the tech check for correct power going to the ECM. I have seen a large
fuse, possibly on a Grand Cherokee, cause a non-start issue. The fuse was located in the engine compartment on the right side. Also can you blink DTC codes with your Jeep? Or even plug into it with a scanner? How did the tech determine the ECM was bad? Buy a good used one for checking purposes. just some thoughts -- later, dave AKA vwdoc1 "Artur Jorge Duque" > wrote in message mass.edu... > Hi all, > I've got a pretty much stock 95YJ with around 140,000 miles on it. The > other day, as I was driving, the Jeep turned itself off. It didn't stall > out, just shut down. The battery had juice and I had a half tank of gas. > I tried to re-start but all it would do is crank over and over - nothing > ever caught. > > I took it to a repairman and I was told the computer is dead. I'm > presented with the option to have the computer sent out for rebuilding > (its estimated at about $700). > > Can the computer be rebuilt? Does this sound legit? I've got to give the > dude an answer soon as to what to do, and would like to hear from more > knowledgable people. > > Thanks > > -Art |
#5
|
|||
|
|||
make sure the white wire witha yellow tracer has ing. battery voltage. if
there is none the vehicle will never start jeff wrote: > Mike Romain wrote: > > The most common, and it's 'really' common cause for that is just a dirty > > connection on the CPS on the bell housing. The plug and socket sit > > right on top of the exhaust manifold and corrode easy. A good spray > > with an electronic contact cleaner fixes them. > > > > Another very common one that causes the same symptoms is a dead body > > ground strap. It goes from the rear of the head to the firewall and > > when they quit, it just shuts down the computer. > > > > The last one is a bolt above the dipstick with some small black wires on > > it. This is the computer sensor ground tag. > > > > The main computers almost never fail. It happens for sure, just not > > often. > > > > Even just unplugging the CPS and plugging it back in will usually get a > > start. If you do this and it fires up, you have found the trouble. > > To add to what Mike said, a re manufactured ECU is a lot cheaper than > $700. A quick check of http://www.ecudirect.com shows a price of $250, > and since they rarely fail I would imagine one could be had from a junk > yard for much less. They are simple to replace but connectors and fuses > should be checked first. > > -- > jeff |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
rec.autos.makers.chrysler FAQ, Part 1/6 | Dr. David Zatz | Chrysler | 6 | December 7th 06 04:55 PM |
rec.autos.makers.chrysler FAQ, Part 1/6 | Dr. David Zatz | Chrysler | 5 | March 21st 05 05:33 AM |
rec.autos.makers.chrysler FAQ, Part 1/6 | Dr. David Zatz | Chrysler | 5 | March 6th 05 05:29 AM |
rec.autos.makers.chrysler FAQ, Part 1/6 | Dr. David Zatz | Chrysler | 10 | November 16th 04 05:28 AM |