Question about 1998 Chevrolet C1500

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98 Chevy Suburban, engine turns over, will not start

I have a 5.7L engine, I get spark at all 8 plugs, when I spray starter fluid in the intake I don't get combustion, the ignition coil and ignition control module test fine. my next thought is the starter because when it seems to try and start it slows down and seems to backfire, almost like it is overloading the starter. not sure about the compression.

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  • nyxt00 Dec 28, 2008

    Didn't even think of the timing chain. It has 138,000 miles. Wouldn't a jumped chain cause problems while running before turning it off? I had the wires meg'd (high voltage low amp test) it passed but might change them anyhow. But i did not change anything from when it was working one night to not working in the morning, It did struggle a little at starting the morning before.

  • nyxt00 Jan 01, 2009

    Checked the timing, it was still good. Another suggestion I had received was the alternator as that has caused problems in GM vehicles with starting, that was not the problem. I ended up taking the vehicle to a mechanic I know. Even though I was getting a spark it was weak. What had happened is moisture got into the housing of the distributor cap and cracked something inside causing it to arc and loose power, there was no visible damage at all. Something to keep in mind for the future when the vehicle is in COLD weather.

  • Phil Goncalves May 11, 2010

    What is the mileage on your vehicle? this sounds more like the timing is out of wack. possibly the timing chain that jumped a tooth . Have you replaced the wires on it? if so you might have got the wrong firing order.

  • Anonymous Mar 21, 2014

    Seems like the ignition is "stuck." The key won't turn. Could this have happened just replacing spark plugs?



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It is possible for the vehicle to run perfectly fine before turning the engine off. I have seen it happen and it took me quite a while to figure it out. I would never have thought it was the timing chain until I tried to move the distributor and it kind of started. Thats when I figured out that it was the timing chain. If your vehicle has a distributor, mark the position that its in now and then loosen the bolt holding it down and turn the distributor either way and see if it will start or want to start better. Or you can set your TDC on cylinder #1 and check where the position of the rotor is under the cap. theses procedures are a little easier than taking the timing cover off and checking it that way.

Posted on Dec 28, 2008


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