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91 Chevy Wont Start When Engine Gets Warm


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saviour2012
New User

Oct 15, 2012, 5:41 PM

Post #1 of 6 (3771 views)
post icon 91 Chevy Wont Start When Engine Gets Warm Sign In

Hello I have a 1991 Chevrolet Truck C3500 1 ton P/U 2WD 7.4L TBI 8cyl the problem is when I drive my truck for a while i turn it off then try to turn it back on wont start I have to open the hood and let it cool off for 30 minutes or so before it turns back on also when i turn the key it doesen't make any sound it wont crank does anyone have an idea what it might be

Thank You


nickwarner
Veteran / Moderator
nickwarner profile image

Oct 15, 2012, 5:54 PM

Post #2 of 6 (3761 views)
Re: 91 Chevy Wont Start When Engine Gets Warm Sign In

First make sure you have good clean connections at the battery and the starter. If you do and the wire is also in good shape you are likely getting heat soak in your starter. There are several types of shields or wraps out there to help this.

This one is from Mr.Gasket and Summit Racing sells it for $23. You can also find ones that are an aluminized wrap that you zip tie on the starter.


saviour2012
New User

Oct 15, 2012, 6:16 PM

Post #3 of 6 (3739 views)
Re: 91 Chevy Wont Start When Engine Gets Warm Sign In

Thanks Nickwarner for your reply I chked the the connections to the battery and all looks fine starter is couple months old and I do have a shield I even changed coolent sensor.


nickwarner
Veteran / Moderator
nickwarner profile image

Oct 15, 2012, 6:23 PM

Post #4 of 6 (3730 views)
Re: 91 Chevy Wont Start When Engine Gets Warm Sign In

Your coolant sensor isn't going to stop this from cranking over. When you checked the battery connections did you actually unbolt them and work them out of the rubber housing? These side post terminals are awful at holding in corrosion without letter you see it. Have you had the battery tested on a load tester to be sure it is capable at all times of delivering power? A marginal battery won't like being hot anymore that being very cold. Do you have a multimeter?


saviour2012
New User

Oct 15, 2012, 6:28 PM

Post #5 of 6 (3722 views)
Re: 91 Chevy Wont Start When Engine Gets Warm Sign In

I've had my battery tested its good the thing is that when i try to turn the truck on it wont i open the hood let it cool off and it starts back on


nickwarner
Veteran / Moderator
nickwarner profile image

Oct 15, 2012, 7:14 PM

Post #6 of 6 (3704 views)
Re: 91 Chevy Wont Start When Engine Gets Warm Sign In

When it won't turn over, see if you have power to the small trigger wire of the starter solenoid. If you do, then you need to do a voltage drop test on the power and ground side. If it passes that then you likely do have a bad starter.






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