2nd Generation S-series (1995-2005) Tech Discuss 2nd generation S-series (1995-2005) general tech topics here.

Another no start thread.

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Old Dec 28, 2016 | 12:37 PM
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Default Another no start thread.

I have searched for hours and have read most of the no start threads but still can’t find a solution for my problem.
1999 Blazer with 4.3,4 door 4 wheel drive cranks but no start.
Cap and rotor replaced last summer, they still look new.
Pulled coil wire has excellent spark, pulled plug wire off each bank …. same result.
Dixie cup half full of gas down throttle body still no start.
Tried a quick shot of ether later that day same result.
Fuel sprays like a fire hose out of the Schrader valve, but going try to barrow fuel pressure gauge this afternoon to check actual psi.

Had the ignition control module tested at 2 different parts stores each tested 3 times, passed every time.

Ideas?
 
Old Dec 28, 2016 | 01:31 PM
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Update.
Fuel pressure with key on 60.
While cranking 58.
Key off drops pressure slowly, after 1 minute gauge reads 40.
 
Old Dec 28, 2016 | 02:57 PM
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Did the problem just suddenly appear or did you do any work on the truck before the problem started? Do you have any codes?
 
Old Dec 28, 2016 | 06:08 PM
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This is the wife's vehicle it started 2 weeks ago just fine, only thing I have done since was check the antifreeze and Christmas morning she went to start it and that's when the problem started.

Tomorrow if time permits I'll do the pump only test outlined in the sticky.

Just bugs me that of the many GM EFI trucks that I've owned the last 25 years is that if I had a no start issue and the pump was suspect the splash of gas in the throttle body would at least fire and run for a few seconds.
 
Old Dec 28, 2016 | 06:27 PM
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Do you have any trouble codes?
 
Old Dec 28, 2016 | 07:32 PM
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Originally Posted by rockp2
Do you have any trouble codes?
No codes, no engine service soon light.
 
Old Dec 29, 2016 | 04:38 PM
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Found the problem it must have been severely flooded.
Rigged up a gauge for doing the pump only test, turned the key to on pressure went to 45, cranking the engine over it went up to 85 psi, I was about to stop cranking and it sounded like a 12 gauge shotgun went off. Anyway the gauge held at 80 for 10 minutes.
Hooked the fuel line back up turned the key on to let it build pressure then cranked it and it fired right up and idled normally except the exhaust was loud. Next Tuesday it goes to the muffler shop for a replacement as the seam split from one end to the other.
I guess cranking it with no fuel to injectors allowed it to clear the flooded condition.
 

Last edited by kioti; Dec 29, 2016 at 05:16 PM.
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