1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

1998 v6 please help!!!!

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Old May 5, 2018 | 10:03 AM
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Default 1998 v6 please help!!!!

My truck has been having this problem for a while now every morning if I want to go crank it it will not start the motor turns fuel pump pressure is there it just does not want to start but one hour later and it starts no problem I replaced fuel pump replaced water temperature sensor I even tried starting fluid but nothing it won't start
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Old May 5, 2018 | 10:16 AM
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Is the check engine light on?
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Old May 5, 2018 | 10:18 AM
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Originally Posted by oldchevy
Is the check engine light on?
yes its a performance code for the cat
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Old May 5, 2018 | 12:16 PM
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After an hour later when it does start, how does it run?
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Old May 5, 2018 | 12:18 PM
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Originally Posted by oldchevy
After an hour later when it does start, how does it run?
it runs fine sometimes it stutters to switch between gears
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Old May 5, 2018 | 1:35 PM
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The cat may be clogged causing back pressure. Since you have a code on the cat, it might be worthwhile to have it checked out.
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Old May 5, 2018 | 1:39 PM
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Originally Posted by oldchevy
The cat may be clogged causing back pressure. Since you have a code on the cat, it might be worthwhile to have it checked out.
I've also have had miss fires could that be a problem too?
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Old May 5, 2018 | 1:52 PM
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Yes, I have seen that before.
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Old May 8, 2018 | 8:52 PM
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misfires can definitely be from the cat, if its clogged it can cause backpressure. oldchevys got it right.
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