No fire

THEDUCK

MEMBER
1992 GMC SUBURBAN
V8
2WD
AUTOMATIC
120,000 MILES

92 GMC Suburban while idling last night the truck just died it has no miss ran smooth. Pushed it home let sit for and hour or so turned key fired right up. Then this morning again fired right up let heater warm up got in and it died and wont fire. Checked fuel pump wires, plugs, coil, I dunno what it is.

6 Replies

JDL

MECHANIC
16,098 POSTS

Engine cranking, did you visually check for spark at the plugs. Use a gage and check fuel pressure. Any applicable mil codes? How long since a tune-up?

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Thursday, December 9th, 2010 AT 7:13 PM

THEDUCK

MEMBER
4 POSTS

I didn't check for spark, sorry just made sure all were plugged in and I could hear fuel pump come on and shut off by no means am I a mechanic lol. It has been about 4 months since tune up.

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Thursday, December 9th, 2010 AT 7:47 PM

JDL

MECHANIC
16,098 POSTS

To check for spark, you can use a known good plug or spark tester. Pull spark plug wire, use tester in boot, ground tester to metal/ground part of engine. Engine cranking watch for spark. There are several ways to check for spark. Just speaking for myself, I don't like to hold anything in my hand. I've had secondary ignition voltage bite me many times and I still don't like it. Lol. Also, you may need to check injector pulse, engine cranking.

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Thursday, December 9th, 2010 AT 8:45 PM

THEDUCK

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4 POSTS

Ok I will try these. Thank you will repost afterwards. And I was told by a neighbor it could be the fuel pump but I have spayed starter fluid and nothing.

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Thursday, December 9th, 2010 AT 9:06 PM

THEDUCK