bad bucking... sumtimes

louierepo · 07-22-2012, 07:11 PM

I have a 1994 lt1 with 70k, car is cherry. Lately when driving and you try to accelorate she starts to buck, the harder u try to go the worse the buck is and a puff of black smoke. Mechanic has car for over two weeks now and doesn't have a cleu at what it is. Has no lights on or codes in computer. Gas is clean and 94 octane fuel filters are new and still does it. Any thoughts guys, thanks

Seabee 86 · 07-22-2012, 07:41 PM

Shooting from the hip I would guess a fuel pump.

lostvette · 07-22-2012, 08:09 PM

Change Mechanics Too !

Pappytinker · 07-23-2012, 05:23 AM

Just a guess;

http://www.buzzle.com/articles/sympt...regulator.html

toobroketoretire · 07-23-2012, 06:45 AM

Quote:

Originally Posted by louierepo

I have a 1994 lt1 with 70k, car is cherry. Lately when driving and you try to accelorate she starts to buck, the harder u try to go the worse the buck is and a puff of black smoke. Mechanic has car for over two weeks now and doesn't have a cleu at what it is. Has no lights on or codes in computer. Gas is clean and 94 octane fuel filters are new and still does it. Any thoughts guys, thanks

First have your mechanic check the fuel pressure. Then have him pull the spark plugs and see what they look like. If they all look good have him do an ohm test on each of the wires.

Hotrod · 07-23-2012, 09:44 AM

A black puff of smoke would indicate a rich mixture. Check your ignition system, the ign. coil could be on its way out or the feed for the coil or even the trigger for the coil. Had a problem like this before and it turned out to be a pinched ign. coil wire , the 12V feed.

07-22-2012, 07:11 PM	#1
louierepo Smokin Member Join Date: Jul 2012 Posts: 1 My Gallery	bad bucking... sumtimes I have a 1994 lt1 with 70k, car is cherry. Lately when driving and you try to accelorate she starts to buck, the harder u try to go the worse the buck is and a puff of black smoke. Mechanic has car for over two weeks now and doesn't have a cleu at what it is. Has no lights on or codes in computer. Gas is clean and 94 octane fuel filters are new and still does it. Any thoughts guys, thanks

07-22-2012, 07:41 PM	#2
Seabee 86 Smokin 750HP Supercharged Club Join Date: Oct 2008 Location: New Milford, CT Posts: 791 My Gallery	Shooting from the hip I would guess a fuel pump. __________________ "General Malfunction"

07-22-2012, 08:09 PM	#3
lostvette Smokin 750HP Supercharged Club Join Date: Nov 2010 Location: Naples,Florida Posts: 802 My Gallery	bucking Change Mechanics Too ! __________________ A Nitrous Vette is a HAPPY VETTE !

07-23-2012, 05:23 AM	#4
Pappytinker Smokin 2500HP Pro Road Racer Join Date: Nov 2008 Location: Limbo, USA Posts: 2,799 My Gallery	Just a guess; http://www.buzzle.com/articles/sympt...regulator.html __________________ "Because of the one-pointed time awareness in which the conventional mind remains immersed, humans tend to think of everything in a sequential, word-oriented framework. This mental trap produces very short-term concepts of effectiveness and consequences, a condition of constant, unplanned response to crises." Liet-Kynes - Dune

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07-23-2012, 09:44 AM	#6
Hotrod Smokin 1000HP Twin Turbo Club Join Date: Jun 2008 Location: A.C., NJ Posts: 1,392 My Gallery	A black puff of smoke would indicate a rich mixture. Check your ignition system, the ign. coil could be on its way out or the feed for the coil or even the trigger for the coil. Had a problem like this before and it turned out to be a pinched ign. coil wire , the 12V feed.

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