4 or 5 times while driving at varying speeds with a warm or cold engine the engine just quits. After pulling to the side of the road it has, so far, always restarted. Systems that rely on the engine like power steering also quite but the radio and other electrical systems that only need the battery were fine. Once when cold it would not start. The battery is new and I had plenty of battery and cranking speed. I did not smell exhaust or fuel while I was trying to start the engine which leads me to think the problem is in the fuel supply system but I don't want to put extra thoughts in your mind because I really don't know anything about diesel engines. After 15 minutes I tried it again and it started as if there had never been a problem. I cannot tell if it is electrical or fuel or? But it is sudden. There has been no engine missing or hesitation it is running perfectly and then dead. I have taken it to Carr Chevrolet in Beaverton, Oregon. They have started it several times and take short drives over the past two weeks and of course it has worked perfectly. They tell me there is nothing they can do until it stops again and won't start. Is this a common problem with the 94 diesel suburban? Do you have any suggestions? I suspect that Carr does not work on a lot of diesels should I try someone else. Thanks in advance for your help.
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Heed of antifreeze solution temperature!!! You must check the thermostat operating. The thermostat location is on back of alternator at the bottom side of the bracket. IMPORTANT: It is NOT necessary to replace the alternator if you want to change the thermostat !!! Thermostat checking: 1. Cold engine. Start up the engine and watch of the water temp indicator. After first value 60 Celsius Degree you still warm up the engine until the lifter (pointer) reach 80 C deg. (second mark after 60 C deg.). At this time you let engine running at idle speed and check with your hand the thermostat plastic housing and hose temperature in bottom left side of the engine. Heed of alternator driving belt and ventilator fan !!! 2. If the thermostat is good the hose must be cold until the water temp indicator reach almost 90 C deg. 3. The thermostat opening temperature is 87 C deg. 4. If the hose is already warm the thermostat is out of order.
I'm pretty sure GM built your truck with the diesel engine as an option so there is a way to make this work. The trans shifts are based on a combination of ground speed and engine RPM so as long as the computer is able to get these signals your trans should work. I put an early 90's overdrive in a mid 80's truck and didn't plug the wiring in because the trans used a 4 wire plugin and my truck only had a 3 wire. It worked fine, even overdrive.
A little jury rigging and ingenuity should find a way to attach your current kickdown cable to the accellerator on the diesel pump. GM probably has a bracket to make it fit. Check with the parts guys at the counter. Hope this helps.
The charging system, pedal, and sensors have been checked. The trans. problem and missing problems were the original problems and when my mechanic finally sent me to Chev. none of the problems " choose to show themselves." I should know on Mon. if my mechanic has solved the problems with the greater number of symptoms. Keep me in your files. More later- Bill