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SUVs Chevrolet Suburban & Tahoe Chevrolet Suburban and Tahoe Start problems
220 messages, Last post on Mar 13, 2010 at 9:39 AM
You are in the Chevrolet Suburban & Tahoe Forum. Your Hosts are steve_ & tidester
| My 1996 Tahoe was having terrible problems starting and running correctly. The initial diagnosis was the crankshaft position switch was malfunctioning. After almost $2000 dollars of replacing the sensor, engine tune-up, fuel filter and fuel pump I was still having the same problems, but not all the time. I had a local mechanic due the work and he said take it to Chevy and have them diagnose the problem, which they determined was still the crankshaft position switch was malfunctioning. Since my mechanic had done the original work I took the Tahoe back to him with the Chevy diagnosis problem. He crawled under the truck with it running and saw the sensor moving around while it was running. He took the sensor out and discovered that one of the mounting bolts screws into a brass fitting inside the plastic timing chain cover. The brass fitting was loose and just needed a screw driver inserted into it to spread it to increase the tension on the plastic cover. My mechanic put it back together and it resolved all my problems, meaning most of the $2000 dollars I had spent trying to fix a problem that ended up being caused by maybe a 25 cent brass fitting in a plastic cover. Live and Learn. By the way my 1996 Tahoe has almost 154000 miles on it with the original engine and transmission. | |
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| 1994 chevy suburban 1500. will crank, but willnot start. fuel press checks good. no fuel flow from the injectors.Already replaced injectors, inline fuel filter, . Will attempt to start when stat fluid added. | |
Have a 2004 Tahoe that has failed to start without any pattern for several months now . Usually at the mall or when out with the kids. All works when I try to start, but will not. All the lights function and the radio and tv work. No sound at all when trying to start. Have had towed to dealer 5 times. My luck, always started when got there. Finally, this week when I went to get car, did not start at the dealer. They now say it is the ignition switch, but need to check to make sure this is the problem. Has anyone had these same issues and had them resolved with success? Thank you.
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Replying to: polk1964 (Oct 05, 2009 7:55 am) Could be any number of factors, battery, corrosion/loose terminal connections, bad starter or solenoid, key switch (particularly if you have a big ring of keys/weight hanging), security chip programming, etc. Nice to find a hard failure, where they can meter to find exactly where the problem is. Else, you have to throw parts at intermittent problems, and that can get expensive fast. |
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I've been trying to find this problem for months now... My truck gets progressively more difficult to start, the longer it sets. On mornings when the truck was driven the previous evening, it will start no problem, but will run rough (really rough - will die at idle) for 15 minutes or so then smooth out and run fine once it has warmed up. IF I let the truck set for a full 24 hours or more, it won't start. In the past, during hard start episodes, I could get it to start if I cranked and cranked and cranked (cooling the starter and cables with water on occasion). When it would start, it would act flooded (lots of smoke and sputtering) - then again it would smooth out eventually and run fine. After the initial hard start, subsequent starts during the day would be uneventful. During one of the hard-start episodes, I confirmed spark with a timing light and tried to use starting fluid with no luck. Pulled plugs and they were a mess, so I replaced them. The motor is a rebuild with about 30,000 miles on it. The fuel pump is a couple of years old. It has new plugs, wires, cap, rotor, coil, ICM, and I have the upper intake off now to replace the fuel pressure regulator (thinking the fuel would leak by during the time between starts). Am I looking in the right place??? |
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| Is there supposed to be a vacuum hose connected to the port on the side of the pressure regulator on a 1999 Chevy Tahoe with a 5.7? The old one doesn't have one, but the part looks like it's supposed to be connected to something... | |
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Replying to: swdodson (Oct 07, 2009 7:39 pm)
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Replying to: kiawah (Oct 07, 2009 8:11 pm)
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Replying to: swdodson (Oct 14, 2009 10:17 am) Black wet and sooty, is too much fuel with maybe not enough spark. What error codes are being set in the computer? |
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Replying to: swdodson (Oct 14, 2009 10:17 am) Since the ignition timing is computer controlled, I am suspecting the PCM. Chevy dealership said that they will do a complete diagnosis for $75 and it will go towards the solution, be it computer flashing or whatever. Otherwise I can get a PCM cheap from the local pull apart, but I'd be taking my chances being that the PCM is to be reprogrammed with your own VIN#. Just wanted to let you know that you are not alone. |
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