slow smooth acceleration at full throttle

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Oct 15, 2006 | 07:36 PM

Kool88vette

Thread Starter

Drifting

Joined: Oct 2006

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From: Citrus Heights California

slow smooth acceleration at full throttle

Why is my 88 vette quicker at 3/4 throttle? It bogs down at full throttle and then accelerates at a slow steady pace. If I start at 3/4 throttle and then floor it after I get rolling it is quicker. Lots quicker. Is it my TV cable?

Oct 15, 2006 | 11:55 PM

goldeneye_vet

Burning Brakes

Joined: Jun 2002

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From: sd

Improperly adjusted TPS is a possibility. Best to get your FSM and follow the troubleshooting charts to see where you stand.

Oct 16, 2006 | 12:58 AM

Aggravated4life

Race Director

Joined: Aug 2000

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Cruise-In II Veteran

Clogged converters can do that inside the exhaust...but the basics I would check first is timing,TPS as mentioned,fuel pressure,etc.

Oct 16, 2006 | 07:35 AM

Kool88vette

Thread Starter

Drifting

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From: Citrus Heights California

it has a new car sound convertor. I have an adjustable fuel pressure regulator set at 40lbs. I messed with that and 40lbs seems to work best. I hate to sound stupid but what is the tpi?

Oct 16, 2006 | 07:37 AM

Kool88vette

Thread Starter

Drifting

Joined: Oct 2006

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From: Citrus Heights California

Quote:

Originally Posted by Kool88vette

it has a new car sound convertor. I have an adjustable fuel pressure regulator set at 40lbs. I messed with that and 40lbs seems to work best. I hate to sound stupid but what is the tpi?

I mean the TPS and the timing is set to 11 degrees.

Oct 16, 2006 | 07:46 AM

Kool88vette

Thread Starter

Drifting

Joined: Oct 2006

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From: Citrus Heights California

Quote:

Originally Posted by Kool88vette

I mean the TPS and the timing is set to 11 degrees.

I found it TPS is a throttle position sensor. I will check it out and THANKS!

Oct 16, 2006 | 08:20 AM

Sam Lam

Melting Slicks

Joined: Apr 2002

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From: St. Charles, MO Route 66 Corvette Club

Why is the timing set at 11 degrees before top dead center? The factory spec is 6 degrees BTDC and some run it to 8 and maybe 10. I have acquired a scan tool and now realize why the factory suggests 6 degrees timing advance. I recommend going back to "6" on the timing and set the tps to .54 volts.

Oct 16, 2006 | 12:04 PM

goldeneye_vet

Burning Brakes

Joined: Jun 2002

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From: sd

Start with the basics covered and everything set back to stock. When you have that set than you can make changes but like Sam says without a scan tool you'll be making changes without knowing the effects of those changes.