LT1 Problems

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Sep 3, 2006 | 08:54 PM

sebesta1990

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From: Michigan City Indiana

LT1 Problems

My whole family is gearing up for funfest. All are vettes are ready to go except my Dad's. Both of his C4s are acting up. 93 Vert and 95 Coupe. Hopefully someone can offer some assistance. The 95 will run fine for a while, sometimes an hour to just 10 minutes. After that it sputters and dies. He can wait for a while and sometimes it starts and sometimes it won't. The 93 sounds like it is missing and is lacking power. I know nothing about LT1s. I have an L98. Pleases help.

Sep 3, 2006 | 09:18 PM

vetteblack

Burning Brakes

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From: Houston PA

does either one have check engine lights on when they are running?

Sep 3, 2006 | 10:16 PM

sebesta1990

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From: Michigan City Indiana

The 93 did. He changed the module on it and the light went out. It still idles and runs like crap.

Sep 3, 2006 | 10:37 PM

BrianCunningham

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From: Boston, Dallas, Detroit, SoCal, back to Boston MA

Ignition module?
If so, check the plugs, they're probably fouled up after running with a bad module. You probably need to reset the idle speed motor as well.

Sep 4, 2006 | 12:12 AM

Jet-Jock

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From: Lake Mary Florida

Have either of them set any DTCs?

Sep 4, 2006 | 02:38 PM

runner140*

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From: Ft. Lauderdale Fl

You need to check for engine codes. Use your search to find out how to use a paper clip. If you have a code, get back to us and that will be a place to start trouble shooting.

Sep 4, 2006 | 05:51 PM

sebesta1990

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From: Michigan City Indiana

He has scanners. 95 had 42 code. after the module he didn't check it. at 162 deg the 95 started to die.

Last edited by sebesta1990; Sep 4, 2006 at 05:55 PM.

Sep 5, 2006 | 03:02 AM

REDC4CORVETTE

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From: Lahaina Hi

What is the fuel presure at Idle with the vaccum line to the regulator disconected?
When was the fuel filter changed.
E10 will take out a fuel filter .