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V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters
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Old 09-28-2013, 09:30 PM   #1
tspina94
 
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Question not receiving enough gas when first start, causes it to almost stall and very low acc

i have a 1998 v6 mustang 5speed with a single mod (intake) all els stock.
when i first start up car it doesnt receive enough gas that i give it and it causes it to buck and shake almost to the point of stalling at first gear, after 10-15 mins of driving its fine and it respawns normally.
i have no idea whats wrong with it, its almost like it take really long to warm up but to the point of stalling is extreme and not normal . need help please !!!
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Old 09-29-2013, 12:29 AM   #2
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Ok do you have a check engine light on?
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Old 09-29-2013, 09:04 AM   #3
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No I don't, no dummy lights or anything. It has about 113,000 on it. When I first start my car though the temperature stays on cold for like 15 mins then makes its way to normal in the middle slowly, I don't know if that's just normal though.
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Old 09-29-2013, 11:51 AM   #4
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Kinda normal. Mine takes about 5 min to start moving. Maybe a little longer.
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Old 09-29-2013, 04:25 PM   #5
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Well I understand the car needs to warm up but 15 mins is long, and I live in FL so it's already not cold here haha, I don't know if there's anyway to improve this, maybe new spark plugs or mass air flow or something.
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Old 09-30-2013, 12:45 AM   #6
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Another question is, how long has it been since youve changed the fuel filter? And if hasn't been to long how much pressure are u getting from the fuel pump?
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Old 09-30-2013, 02:20 AM   #7
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Quote:
Originally Posted by tspina94 View Post
Well I understand the car needs to warm up but 15 mins is long, and I live in FL so it's already not cold here haha,
Unless its over 100 degrees on a daily basis, it will still take some time for the car to warm up. Warmed up is the motor temp at around 180-190 degrees (depending on your thermostat).

I would also test your IAC valve (idle air control valve). Search the forum there are a lot of post with similar symptoms. Good luck..
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Old 09-30-2013, 02:08 PM   #8
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That I don't know, I never asked the previous owner of the car, but I'm willing to change it always.
And okay thank you, I'll look into testing it, appreciate the feed back.
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Old 09-30-2013, 11:50 PM   #9
MaxOrbit

 
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Quote:
Originally Posted by tspina94 View Post
i have a 1998 v6 mustang 5speed with a single mod (intake) all els stock.
when i first start up car it doesnt receive enough gas that i give it and it causes it to buck and shake almost to the point of stalling at first gear, after 10-15 mins of driving its fine and it respawns normally.
i have no idea whats wrong with it, its almost like it take really long to warm up but to the point of stalling is extreme and not normal . need help please !!!
Going out on a limb here but I'd suspect a faulty coolant temp sensor. It should tell the ECU that your motor is cold and enrich the mixture like an old time choke. I have no idea where this sensor is located.
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Old 10-01-2013, 02:46 PM   #10
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Okay that's sounds what it can likely be acutely, I think I may have a idea but I'll research to find it, thanks!
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Old 10-01-2013, 02:46 PM
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