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bogging/ stalling/ high idle

Old 02-05-2019, 05:31 PM
  #1  
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Join Date: Jun 2018
Posts: 18
Car: 1990 RS Camaro
Engine: 305 TBI
Transmission: 700r4
bogging/ stalling/ high idle

I have a 90 RS 305 TBI car runs fine for about thirty minutes then starts to bog at random intervals even while accelerating sometimes if I feather the gas I can keep it going. If I let it sit for a while it will run fine again for a while even with the engine temp at operating temp. I'm thinking it may be the fuel pump; is it possible that the pump is running hot and starts to fail until I shut the car off for a bit?
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Old 02-05-2019, 06:02 PM
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Join Date: Dec 2004
Location: Mile High Country !!!
Posts: 11,189
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: bogging/ stalling/ high idle

You can check fuel pressure to illuminate the pump. It could also be the ignition control module in the distributor they commonly fail when heated up.
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Old 02-05-2019, 06:11 PM
  #3  
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Join Date: Jun 2018
Posts: 18
Car: 1990 RS Camaro
Engine: 305 TBI
Transmission: 700r4
Re: bogging/ stalling/ high idle

I guess I should start with getting a fuel pressure valve (T bar valve I think) hook it between the TBI and fuel line right?
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Old 02-05-2019, 06:18 PM
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Join Date: Dec 2004
Location: Mile High Country !!!
Posts: 11,189
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: bogging/ stalling/ high idle

Correct , some testers allow you to place where the fuel filter goes. Drivers side rear frame rail. I think tbi fuel pressure is 10-12psi.

Last edited by Tuned Performance; 02-05-2019 at 06:22 PM.
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Old 02-09-2019, 06:05 PM
  #5  
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Join Date: Jun 2018
Posts: 18
Car: 1990 RS Camaro
Engine: 305 TBI
Transmission: 700r4
Re: bogging/ stalling/ high idle

I went ahead and tested it it stayed at 11 PSI, but it wasn't bogging at this point I have to drive it around for a bit before it will bog. On another note I was doing some research into the charcoal canister/ vapor canister and am focusing on that a bit because that sounds like that could be my issue as well. I can't find that much information on them nor do I really understand how it works. Anyways I have the enclosed canister I think from 89 and up does anyone know how to tell if those go bad or if there's a way to reuse it since it doesn't have a reusable filter?
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