1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
08-13-2010, 07:30 AM
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Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73
1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
Ok I have a 1992 firebird with a 305 tbi, the car has 175,000 miles and I've noticed that my car has a slight surging feeli to it while slowly accelerating, I changed the TPS but still does this what could this be?
08-13-2010, 08:10 AM
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Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
1. Check for codes, never replace anything without knowing its really faulty.
2. Setup a fuel pressure tester and see if fuel is the problem.
2. Setup a fuel pressure tester and see if fuel is the problem.
08-13-2010, 08:58 AM
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Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
Also what are some ways to check your fuel pressure?
08-13-2010, 09:48 AM
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Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
<IMG>http://cfm-tech.com/images/product/tbiadapterandpsigauge_s.jpg</IMG>
Stock TBI system runs around 13PSI but I have seen engines run as low as 9 PSI. Anything less than 10-11 PSI you'll get stumbles and less than spirited performance. With miles that you have on you car it is likely that you have OE Fuel pump. Ninety percent of the time fuel pump is tired and output section hose connecting FP to the gas tank feed through is leaky.
Start with fuel pressure test....
//RF
08-13-2010, 10:23 AM
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Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
I purchased one from Autozone and its perfect, part number is CP7817. Its $50 but can save you the time and money of going around replacing parts that don't need to be replaced. Also yes it can throw codes without the light coming on, do the paper clip method and extract the codes and maybe that can shed some light on what might be going on.
08-13-2010, 10:40 AM
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Car: 1992 Pontiac Firebird Convertible
Engine: 5.0 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: 1992 Firebird 305 TBI hesitation/surging while accelerating slowly??
I purchased one from Autozone and its perfect, part number is CP7817. Its $50 but can save you the time and money of going around replacing parts that don't need to be replaced. Also yes it can throw codes without the light coming on, do the paper clip method and extract the codes and maybe that can shed some light on what might be going on.
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