LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Hard to start and hesitation

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Old 08-23-2004, 04:28 AM
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Hard to start and hesitation

Okay here goes I have a 1993 trans am. Its a lt1 a4 My first problem. Car has a hard time starting after it sits for more than 30 min. I looked trought the search forums and found some things to test for I will do them tomarrow and get back to you with my results. Has anyone solved this problem if so tell me what you did to solve it. Second problem it hesitated a little of the line and in stop and go traffic only in first and second at low rpm's(under 2000). What might the cause be? This car is 100% stock and has only 97000 on it. Any and all help is very much appreciated
thanks Rusty

Last edited by tealman92; 08-23-2004 at 04:29 AM. Reason: forgot the mileage of the car
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Old 08-23-2004, 04:34 AM
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Re: Hard to start and hesitation

>I hope this link helps ... http://www.mainstreamtopics.com/foru...p?showtopic=78
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Old 08-23-2004, 08:11 PM
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Re: Hard to start and hesitation

Make sure you check your fuel pressure!
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Old 08-24-2004, 02:05 PM
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Re: Hard to start and hesitation

ok Ill check the fuel pressure and get back to the board
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Old 08-25-2004, 02:14 AM
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Re: Hard to start and hesitation

Ok here are my results
10 psi as it primes
0 after its done priming
So I guess my next step is find out where in loseing pressure.
Fuel pump or injectors right?
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Old 08-25-2004, 03:35 AM
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Re: Hard to start and hesitation

Originally Posted by tealman92
Ok here are my results
10 psi as it primes
0 after its done priming
So I guess my next step is find out where in loseing pressure.
Fuel pump or injectors right?
Sounds pretty brutal, it should be above 42 at priming (key on, engine off). It should stay there too. Engine idling it should be around 36 psi.
If your leaking through the fuel pressure regulator pull the vaccum line off the fuel pressure regulator to see if fuel is coming out. but i you got 10 PSI at prime thats waaay below spec. I'd put my money on your fuel pump...
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Old 08-26-2004, 03:26 PM
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Re: Hard to start and hesitation

Cool thanks man Im pretty much an expert in changing the pump in these cars since I have owned 4 of them so far. I can get it done in less than 3 hours so I know what I'm doing on saturday morning
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Old 08-26-2004, 04:21 PM
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Re: Hard to start and hesitation

fuel pump...same thing happened to me ....good luck on teh install
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