Last post on Nov 28, 2013 at 5:49 PM
You are in the Chevrolet Suburban & Tahoe
What is this discussion about?
Chevrolet Suburban, GMC Suburban, SUV
#427 of 1043 Re: 2002 Chevrolet Suburban LT, Engine shut off while driving [dranedad]
Oct 28, 2005 (3:40 pm)
Just one thing perhaps worth to check.
I have a '04 Tahoe and had a lot of trouble with bad gas mileage and while trouble shooting the issue I found one very strange thing. The MAP sensor connection was bad and if I just touched the wire harness while engine was idling the engine shut off. Now that is understandable for bad connection but what is not is that it did NOT set a code in the computer.
To rule out the MAP sensor I think you can drive your vehicle without it. If you just disconnect the wire harness from the sensor I think you can operate the vehicle almost as normal. You would have slightly worse gas mileage as the computer goes to operate in a pre-programmed mode due to missing MAP sensor. If your vehicle would not shut off with MAP disconnected you might have found your problem.
Pulling the wire harness will set the code in computer but if you have a bad connection with the signal wire alone there will be no code. That was the problem in mine. Signal wire is the middle one in my Tahoe, which I believe is the case in your vehicle too.
The contacts in the harness were really loose and I replaced them myself. The dealer gave me the new contacts but would not do the job.
This problem can be very difficult to find as there is no code left in computer.
You say your mechanic can replicate the problem. How does he do that?
#428 of 1043 Starts but cuts off immediately
Oct 29, 2005 (5:46 am)
Suburban 1999 1500 LT
Engine turns and catches, but cuts off immediately (within seconds).
Any ideas or things to check?
I can check OCD codes but is that going to be helpful?
#429 of 1043 97 Suburban ABS Brakes
Oct 29, 2005 (5:25 pm)
I absolutely hate ABS brakes, on my 1997 GMC Suburban, especially in the winter months. They are like having no pedal at all. A skid is much easier to handle that almost driving through what ever it is that you are going to hit. Recently, the ABS has been going off just before a complete hault, also in reverse. They just started growling ar me going around tight corners also.
Will the problem show up on cumputer diagnostics?
I would rather disable the ABS, does anyone know how? At least it would be safer in the snow.
#430 of 1043 Re: 97 Suburban ABS Brakes [wildwilly1]
Oct 30, 2005 (7:20 am)
I'm not sure if I understood your message correctly but ABS going OFF just before complete stop in my understanding is what the system is designed to do. Otherwise you could not make a complete stop at all.
Hoe are your tires? Are they good enough for any grip on snow. I understand your "like no pedal at all" feeling comes when you are driving on snow or ice.
If your brakes stop the vehicle on dry pavement ok and then you have an issue on snow it sounds like you just don't have enough grip on snowy road to feel any braking forces. Remember ABS is designed to keep wheels from lock-up and the maximum braking force you can feel is determined by the grip of the tires on the road.
Of course you could have a problem in the ABS system and I'm not sure if it sets a code either.
Disabling the system does not sound good idea at all. What about having it serviced and fixed if found defective. Your large vehicle would handle better at heavy braking incidences.
#431 of 1043 Re: 97 Suburban ABS Brakes [arrie]
Oct 30, 2005 (4:26 pm)
This problem is happening on dry pavement. I apply force to the pedal when I am going into a corner I can hear the ABS motor groaning, and at the same time I start to loose pedal. The pedal gets pretty spongy, at the same time the front brakes let up like they are disengaging. This also happen near the completion of a stop, at about 4 MPH or less the same occurence takes place. The reservoir is full of fluid. I hooked the computer up this morning, but out machine does not go so far as ABS systems in diagnostics.
We will begin to get snow and ice in December. I have been brought up in the towing business, so I can drive in anything. My statement about Hating ABS in the winter is true. When there is snow and ice I can no longer sense the amount of grip my tires are producing on the surface. I can't stop the damn thing the way I am use to. It is tragic that things have come to this, when experienced drivers no longer have total control of their wheels.
My son had ABS problems with his Cavalier, all we did was unplug the wires at the ABS and he had great brakes that were totally controlable.
I am totally comfortable with my driving ability and I would love to be able to disable the ABS but this system may not allow it. Do you know the way?
By the way, thank you for response to my problem, I greatly appreciate your time and effort.
#432 of 1043 Re: 2002 Chevrolet Suburban LT, Engine shut off while driving [arrie]
Oct 31, 2005 (6:29 am)
Thanks for your response. My mechanic replicated the problem by letting it sit idling for about 2 hours then driving it. Once it started to act up, it did so constantly until they shut it down. A computer check said all eight cylinders were misfiring but did not show cause. It doesn't seem to show up driving short distances. When I drive for over an hour or for about 30 minutes in bumper to bumper traffic, it starts to show up. I dropped it off at the dealership over the weekend but they wont be able to look at it until Tues or Wed. Things are way backed up in New Orleans. When my mechanic put in a new battery, it ran fine for about 2 weeks before the next incident. Apparently draining batteries, engine shutdowns, and weird electrical events are common in suburbans but I have not heard a definitive cause yet. I added nothing to the suburban since it was purchased. The only thing I use is a GPS which I unplug every time I stop the vehicle.
Oct 31, 2005 (6:46 pm)
hey everyone (i know this is kinda off topic)
My dad and I just bought a lot of sound equipment for out boat but since this is the off season we wanted to keep it in our suburban. we dont want to replace the factory head to have pre-amp signals since it ties into the dvd and steering wheel controls. we are going to run the signals into the powered signal option on our amp and get the signal from the small stock sub. the problem: we dont know which wire sends the sub signal without pulling out the whole console on the sub. If anyone knows the pinout diagram or know a website i would greatly appreciate the help. its so hard to find the little information you need.
#434 of 1043 Re: 97 Suburban ABS Brakes [wildwilly1]
Oct 31, 2005 (9:03 pm)
That's because GM used half assed ABS systems in many vehicles during the 90s. Many were a single or two channel setup. Meaning if one wheel started to lock up, all 4 wheels would be effected when trying to get the wheel that's locking to gain traction. I hope by now, they are using a 4 channel system, where each brake can be controlled independently. With the 3 and 4 channel setups, you'll rarely get the ABS activating while breaking into a corner and in the snow they work much better.
#435 of 1043 Re: 2002 Chevrolet Suburban LT, Engine shut off while driving [dranedad]
Nov 01, 2005 (7:45 am)
Based on your comments it seems like your problem is heavily temperature related, i.e. when the mechanic lets it idle for 2 hours to heat up or when you drive it long enough.
Then you get misfire in all cylinders, which talks about a serious timing problem.
Have your mechanic to change the crank shaft position sensor. It is a $63 + tax part. I changed mine in my Tahoe and it seemed to be of some help for my issues at the time. This sensor is mounted in the side of the engine and will get hot when engine oil heats up since the oil is slung on the sensor by the wheel it reads.
This sensor really changes temperature big time and can start act up when hot.
Sensor is located behind starter motor so it takes a little bit work to get to it as the starter must be removed first. Your mechanic should have no problem to get there though.
After sensor change you might get a check engine light and a code indicating misfire. If this happens you need to have the sensor re-learned by the computer in your truck, which procedure is available only at the dealer service ($75 or so) I believe.
The other sensors that have to do with engine timing are MAP sensor, cam shaft position sensor and knok sensors. MAP sensor should not be temperature sensitive that bad but the cam shaft position sensor probably is just like crank shaft position sensor is. In my truck this sensor is a little bit harder to get to as it is located on top back part of the engine. Knock sensors are located between intake manifold and engine top so to get to these the manifold has to be removed. Your engine probably has them in same locations.
I would start with the crank shaft position sensor for eliminating your problem.
#436 of 1043 2002 Chevy Suburban Suddenly lost all power
Nov 01, 2005 (8:17 am)
The title says it all, does anyone have any suggestions? Can a battery suddenly die with no warning? We were loading up the kids last night to go trick or treating and the lights were on in the vehicle, when I turned the ignition switch, the whole car went dead. I went out there this morning, and the remote for the door locks won't even work!