1988 Silverado k1500 z71 - runs great, for a few minutes.

rkrizan · 03-26-2007, 11:49 AM

I have a problem with my pickup. It has a relatively fresh motor, with only 30,000 on a crate engine (350CI/TBI). It ran great for about 2 years of use. The other day, I started it up to do some hauling and I left it to idle for about 5 minutes before I moved it, which I normally do, however, it started idling higher and higher and the check engine light came on. I figured the automatic choke was stuck or something, and at this point the engine was at proper operating temperature anyhow so I tapped the throttle to bring it back down. The truck starting choking and it died, and would not restart. It wouldn't kick at all, as if it was starving for fuel. So I checked the plugs, they had a little carbon on them, so I replaced them, along with the cap, router and wires. Of course by this time the engine was cool again, so it fired right up. I again let it sit for a few minutes, and it did the same thing. I let it cool for a couple hours, pulled the oxygen sensor, cleaned it off a bit, changed the air filter, checked the map sensor plug, and even tested the map sensor, all seemed fine.

This time, when the engine was cool, I started it up, and immediately took it out on the road and opened her out, thinking maybe she needed her throat cleared, ran great, until it got to proper temp again. Got it back to the yard, she died, refused to start. I'm kind of lost, as I've tried tracing down any electrical problems, replaced several parts, etc. Any of you know what I might be missing? I know chevy engines like the back of my hand, so any help would be much appreciated. The only thing I haven't checked is the computer, however from what I'm told once a computer goes, it goes.

I've just recently replaced the fuel filter, and pump as well.

Thanks

chadwickthomas · 10-28-2009, 01:08 AM

it SOUNDS LIKE YOUR IGNITION MODULE IS BREAKING DOWN OR THE PICK UP COIL IN YOUR DISTRIBUTOR IS GOING OUT BUT ITS PROBABLY THE MODULE SINCE THE PICK UP WILL SET A CODE AND THE MODULE WILL NOT

leolkfrm · 10-28-2009, 03:19 AM

was a code set? a stickey egr will do that!

bradrhale · 10-28-2009, 01:51 PM

and leo gets got again.

Wyley87 · 10-28-2009, 02:04 PM

shouldnt we close threads that have had no activity in over a year to prevent this sort of thing

03-26-2007, 11:49 AM	#1
rkrizan Junior Member Join Date: Mar 2007 Posts: 9	1988 Silverado k1500 z71 - runs great, for a few minutes. I have a problem with my pickup. It has a relatively fresh motor, with only 30,000 on a crate engine (350CI/TBI). It ran great for about 2 years of use. The other day, I started it up to do some hauling and I left it to idle for about 5 minutes before I moved it, which I normally do, however, it started idling higher and higher and the check engine light came on. I figured the automatic choke was stuck or something, and at this point the engine was at proper operating temperature anyhow so I tapped the throttle to bring it back down. The truck starting choking and it died, and would not restart. It wouldn't kick at all, as if it was starving for fuel. So I checked the plugs, they had a little carbon on them, so I replaced them, along with the cap, router and wires. Of course by this time the engine was cool again, so it fired right up. I again let it sit for a few minutes, and it did the same thing. I let it cool for a couple hours, pulled the oxygen sensor, cleaned it off a bit, changed the air filter, checked the map sensor plug, and even tested the map sensor, all seemed fine. This time, when the engine was cool, I started it up, and immediately took it out on the road and opened her out, thinking maybe she needed her throat cleared, ran great, until it got to proper temp again. Got it back to the yard, she died, refused to start. I'm kind of lost, as I've tried tracing down any electrical problems, replaced several parts, etc. Any of you know what I might be missing? I know chevy engines like the back of my hand, so any help would be much appreciated. The only thing I haven't checked is the computer, however from what I'm told once a computer goes, it goes. I've just recently replaced the fuel filter, and pump as well. Thanks

10-28-2009, 03:19 AM	#3
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,931	was a code set? a stickey egr will do that! __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

10-28-2009, 02:04 PM	#5
Wyley87 Senior Member Join Date: Jul 2009 Location: Arlington, Tx Posts: 663	shouldnt we close threads that have had no activity in over a year to prevent this sort of thing __________________ 96 GMC C1500 305 2WD K&N FIPK C.A.I. Rebuilt Motor and Trans Mobil 1 15w50/Mobil 1 Filter 05 Nissan Xterra 4.0 V6 Royal Purple 5w30/Mobil 1 Filter Cost money to go fast...How fast do you wanna go?

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10-28-2009, 01:08 AM	#2
chadwickthomas Junior Member Join Date: Oct 2009 Posts: 11	it SOUNDS LIKE YOUR IGNITION MODULE IS BREAKING DOWN OR THE PICK UP COIL IN YOUR DISTRIBUTOR IS GOING OUT BUT ITS PROBABLY THE MODULE SINCE THE PICK UP WILL SET A CODE AND THE MODULE WILL NOT

10-28-2009, 01:51 PM	#4
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 9,547	and leo gets got again.