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1998 chevy truck won't start


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cgmasten
Novice

Jan 26, 2015, 10:28 AM

Post #1 of 12 (1145 views)
1998 chevy truck won't start Sign In

i have a 1998 chevy silverado 5.7 engine over 200,000 miles that won't start
turns over has fuel, fire, compression any suggestions


Discretesignals
Ultimate Carjunky / Moderator
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Jan 26, 2015, 12:25 PM

Post #2 of 12 (1127 views)
Re: 1998 chevy truck won't start Sign In

What are the compression numbers?
What is the fuel pressure while your cranking the engine?
Can the spark jump at least 3/4 inch gap?

Was there any recent repair work done prior to your issue?
Any trouble codes stored in the engine computer? If so, what are the numbers?
Will the engine run if you spray starting fluid into the throttle body?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 26, 2015, 12:30 PM)


cgmasten
Novice

Jan 27, 2015, 7:18 AM

Post #3 of 12 (1102 views)
Re: 1998 chevy truck won't start Sign In

compression is between 170 and 180 between all 8
fuel pressure is 65
good spark
no repair in 5 years routine maint.


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jan 27, 2015, 7:49 AM

Post #4 of 12 (1098 views)
Re: 1998 chevy truck won't start Sign In

You aren't conclusive yet. DS asked if you tested with starting fluid - so did you? Fuel pressure is fine and compression so two down two to go. Is it delivering fuel you don't know or if spark is good not just your say so IS IT ABLE TO JUMP a large gap with a tester best.


If you are just holding a plug attached to a wire and grounding the threads that's not enough yet for a no start problem,


T



cgmasten
Novice

Jan 27, 2015, 10:22 AM

Post #5 of 12 (1092 views)
Re: 1998 chevy truck won't start Sign In

spark jumped about 3/4 of an inch
is getting fuel
checked injecter
sprayed starter fluid into air intake ,nothing


Discretesignals
Ultimate Carjunky / Moderator
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Jan 27, 2015, 10:40 AM

Post #6 of 12 (1086 views)
Re: 1998 chevy truck won't start Sign In

Are you checking for spark at the coil or at the plugs?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jan 27, 2015, 11:00 AM

Post #7 of 12 (1084 views)
Re: 1998 chevy truck won't start Sign In

Nothing!


Hmmmm - Codes read and post #s if possible?


It should have at least backfired or something if all that was correct. Recent work if any? Anything before this for a clue?


Is oil smelling of fuel and too full -- plugs gas fouled? It's possible to flood out bad enough alone on some that when soaked plugs will take the spark but ground out spark thru wet porcelain insulator not make the jump and a real spark. Might show a jump on a plug but not under compression. That or spark it totally off time.


It's not that common to flood out that bad but on the check list for wet plugs or gas odor in oil evidence. New OE plugs might make it react but the cause isn't solved.


You can't mess with timing on this engine or turn it and if so that's your trouble IMO for now and why it was messed with at all a cause still lurking.


I'd check for serious flooding evidence now and get codes too when possible,


T



cgmasten
Novice

Jan 27, 2015, 11:31 AM

Post #8 of 12 (1080 views)
Re: 1998 chevy truck won't start Sign In

at the plugs for now


cgmasten
Novice

Jan 27, 2015, 11:32 AM

Post #9 of 12 (1079 views)
Re: 1998 chevy truck won't start Sign In

not showing any codes


Hammer Time
Ultimate Carjunky / Moderator
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Jan 27, 2015, 1:22 PM

Post #10 of 12 (1068 views)
Re: 1998 chevy truck won't start Sign In

So, when you say no repairs in the last 5 years, you confirm that NO ONE has touched the distributor or tried to set the timing?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
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Jan 27, 2015, 4:43 PM

Post #11 of 12 (1058 views)
Re: 1998 chevy truck won't start Sign In

This OP is so vague it isn't funny.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 27, 2015, 4:44 PM)


cgmasten
Novice

Jan 28, 2015, 4:28 AM

Post #12 of 12 (1045 views)
Re: 1998 chevy truck won't start Sign In

actually, about 5 years ago the distributor was replaced






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