ls1 wont start
04-18-2010, 07:46 PM
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ls1 wont start Hey guys I have a 00 camaro, car started and was running fine, then started idling rough and died, hasnt started since. I have fuel at the check point on the rail, I have spark but it seems kind of hesitant, I only have spark like every other revolution. Any and all help appreciated.
04-18-2010, 08:30 PM
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also when i pulled the plugs to check the spark, the plugs were dry. its almost like the car acts flooded but no raw gas smell or anything, also has the required pressure. anything guys?
04-18-2010, 08:34 PM
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It's a 4-cycle engine, you're only supposed to spark each cylinder every other revolution.
Nice work w/ the fuel pressure gauge so you can rule out a fuel issue and move on.
Spend $5 or so on a fuel injector Noid light. Pick an injector, remove the electrical connector, and snap the Noid light into the connector. Crank the engine, you should see the light flash.
If no light, start by pulling and checking continuity on every fuse in the panel.
After that it's time to invest in a scanner. The last Vette I fixed had somehow sheared both grounds off the back of the driver side head. Without a laptop scanner there's no way we'd ever have found that by throwing parts at it.
Nice work w/ the fuel pressure gauge so you can rule out a fuel issue and move on.
Spend $5 or so on a fuel injector Noid light. Pick an injector, remove the electrical connector, and snap the Noid light into the connector. Crank the engine, you should see the light flash.
If no light, start by pulling and checking continuity on every fuse in the panel.
After that it's time to invest in a scanner. The last Vette I fixed had somehow sheared both grounds off the back of the driver side head. Without a laptop scanner there's no way we'd ever have found that by throwing parts at it.
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04-19-2010, 08:27 AM
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Yeah thats what I did to check them last night was just go ahead and pull all of them one at a time to check them and see. All of them look good, also put a meter on them just to double check myself. Any more ideas?
04-19-2010, 07:55 PM
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ok so i scanned the car with the GM Tech 2 and came up with some codes. P0107 which was the MAP sensor, EGR, AIR, codes but I have deleted both the EGR and AIR off of the car. So I found that the MAP sensor wasnt plugged in, I plugged it up and now that code is gone. I pulled the plugs again and they seem to be a lil wet but not alot by no means. Also checked the voltage with the scanner, car holds 12.5 on voltage by the scan tool. Also put a noid light on it and it lights up so the injectors should be popping. The injector pulse bandwith is like 59.9 when you first start cranking the car and falls to 49.9-52 after a couple revolutions. Any more ideas? Im in really deep here guys and need all the help I can get. Thanks Again.
04-19-2010, 09:20 PM
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04-20-2010, 07:50 AM
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this one has really got a lot of people confused, some people are saying possible pcm. one guy also told me to check compression, he said it could be a broke camshaft. oil pressure and all does ok when cranking though.
