Fuel tank pressure
06-14-2018, 09:44 PM
#1
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Car: 1991 Pontiac Firebird GTA
Engine: 305 TPI 5.0L
Fuel tank pressure
I have a 1991 Pontiac Firebird GTA. After 30 minutes of driving at regular summer temperatures, when I stop at a light or intersection my car idles way down to around 300 - 400 rpms and almost stalls. It is a 305. 5.0L fuel injected engine. If I pop it in neutral it will rev back up to normal. When I got home I released the fuel cap and a gush of pressure released, enough for the cap to pop out into my hand. Anyone out there in the bird world have any info on this?
thanks
thanks
Last edited by GTAguy549; 06-19-2018 at 06:11 PM. Reason: New topic
06-14-2018, 09:57 PM
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Car: 1991 Pontiac Firebird GTA
Engine: 305 TPI 5.0L
Re: Dual rad fan issues
I'm not sure what the temp would be, seems strange driving for 30 minutes and don't hear them.
speed cut off above 35 mph? So at 70 on the Hiway they won't run?
speed cut off above 35 mph? So at 70 on the Hiway they won't run?
06-15-2018, 06:51 AM
#6
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Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: Dual rad fan issues
following the attached schematic, there is no speed cut off for the secondary fan.
06-15-2018, 07:35 AM
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Car: 1991 Pontiac Firebird GTA
Engine: 305 TPI 5.0L
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06-15-2018, 04:49 PM
#9
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Car: 1991 Pontiac Firebird GTA
Engine: 305 TPI 5.0L
Re: Dual rad fan issues
not sure what’s going on there.
06-16-2018, 04:52 PM
#10
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Dual rad fan issues
So is the car overheating or not? Scratching my head wondering what actual problem you're trying to solve.
FWIW - I can't hear my fans when they run but my car is kind of loud.
FWIW - I can't hear my fans when they run but my car is kind of loud.
06-17-2018, 11:27 AM
#11
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Car: 1991 Pontiac Firebird GTA
Engine: 305 TPI 5.0L
Re: Dual rad fan issues
seems to be working fine now, yay!!!
thanks everyone for your interest in helping though.
06-19-2018, 06:13 PM
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Car: 1991 Pontiac Firebird GTA
Engine: 305 TPI 5.0L
Re: Dual rad fan issues
New problem.....
I have a 1991 Pontiac Firebird GTA. After 30 minutes of driving at regular summer temperatures, when I stop at a light or intersection my car idles way down to around 300 - 400 rpms and almost stalls. It is a 305. 5.0L fuel injected engine. If I pop it in neutral it will rev back up to normal. When I got home I released the fuel cap and a gush of pressure released, enough for the cap to pop out into my hand. Anyone out there in the bird world have any info on this?
thanks
06-19-2018, 06:22 PM
#13
Re: Fuel tank pressure
https://www.thirdgen.org/forums/tpi/...eat-blues.html
You might clean your ufo as the call it valve.
I’m not sure that is your solution but maybe clean your iac.
You might clean your ufo as the call it valve.
I’m not sure that is your solution but maybe clean your iac.
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