Problems with warm starts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1970 CST Short Wide** · 02-12-2022, 02:02 AM

Had this problem awhile back. My battery was bad and the problem went away after installing a new one about 6 months ago. I can take a 15 minute run to the parts house, go in ,get my parts , come right out and it just cranks. Usually
(cold) it fires with a touch of the key. After warm, Cycle the fuel pump a couple times and it reluctantly starts and needs to be cleared out to stay running. This is a 2002 LS1 with aftermarket harness. This is the only problem I’ve had with this since installing 2 years ago

HELP

**AussieinNC** · 02-12-2022, 08:38 AM

A couple of things to check

1/ Bad cold grounds. I would be checking every ground wire connection by removing it and cleaning both the ground connector and the surface it mounts to.

2/ Heat soak into the starter from a set of headers too close to the starter.

3/ Bad battery cables causing a voltage drop. Check the cables for signs of corrosion and replace if necessary.

4/ Check the alternator output is around 13.8 volts or more.

Hope this helps

Davidf · 02-12-2022, 10:43 AM

Leaking fuel injector(s)? Check for fuel pressure bleed off. Crank, but stop before it fires…check for wet plug(s).

**1970 CST Short Wide** · 02-12-2022, 12:52 PM

Quote:

Originally Posted by AussieinNC

A couple of things to check

1/ Bad cold grounds. I would be checking every ground wire connection by removing it and cleaning both the ground connector and the surface it mounts to.

2/ Heat soak into the starter from a set of headers too close to the starter.

3/ Bad battery cables causing a voltage drop. Check the cables for signs of corrosion and replace if necessary.

4/ Check the alternator output is around 13.8 volts or more.

Hope this helps

Theses are making good sense to check seeing that a new Battery seemed to solve last time this happened. Thanks

**1970 CST Short Wide** · 02-12-2022, 12:54 PM

Quote:

Originally Posted by Davidf

Leaking fuel injector(s)? Check for fuel pressure bleed off. Crank, but stop before it fires…check for wet plug(s).

This was the first thing I looked at last time and even put a New set in with no improvement. Thanks

**paul mora** · 02-12-2022, 08:46 PM

Leaking fuel injectors

**1970 CST Short Wide** · 02-12-2022, 10:02 PM

Quote:

Originally Posted by paul mora

Leaking fuel injectors

Pressure gauge holds a constant 58 lbs after shutting off

02-12-2022, 02:02 AM	#1
1970 CST Short Wide Senior Moment Join Date: Mar 2002 Location: Pittsburg Ca Posts: 4,189	Problems with warm starts Had this problem awhile back. My battery was bad and the problem went away after installing a new one about 6 months ago. I can take a 15 minute run to the parts house, go in ,get my parts , come right out and it just cranks. Usually (cold) it fires with a touch of the key. After warm, Cycle the fuel pump a couple times and it reluctantly starts and needs to be cleared out to stay running. This is a 2002 LS1 with aftermarket harness. This is the only problem I’ve had with this since installing 2 years ago HELP __________________ 1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565

02-12-2022, 08:38 AM	#2
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,204	Re: Problems with warm starts A couple of things to check 1/ Bad cold grounds. I would be checking every ground wire connection by removing it and cleaning both the ground connector and the surface it mounts to. 2/ Heat soak into the starter from a set of headers too close to the starter. 3/ Bad battery cables causing a voltage drop. Check the cables for signs of corrosion and replace if necessary. 4/ Check the alternator output is around 13.8 volts or more. Hope this helps __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

02-12-2022, 10:43 AM	#3
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: Problems with warm starts Leaking fuel injector(s)? Check for fuel pressure bleed off. Crank, but stop before it fires…check for wet plug(s).

02-12-2022, 08:46 PM	#6
paul mora Senior Member Join Date: Jan 2009 Location: huntington beach california Posts: 976	Re: Problems with warm starts Leaking fuel injectors __________________ Pulatoy

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