need help with 91 firebird 3.1 vacuum hoses
#1
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Car: 1991 pontiac firebird
Engine: 1991 3.1l LHO
Transmission: Th700r4
need help with 91 firebird 3.1 vacuum hoses
I rebuilt a 1991 3.1l firebird and, I am having a problem finishing it up. I bought the Chilton 82-92 camaro/firebird repair manual book but the vacuum diagram they have doesn't match my firebird does anyone have any vacuum diagrams for a 3.1lv6 fuel injected 1991? or helpful pictures. this is about the best picture i have and it isn't that useful. What I mean by pictures is of where hoses start and end. particularly the hoses that come off the plug in the back of the throttle body, upper air intake's rear end, and what hoses attach to the charcoal cannister. anything you can give me I will be VERY thankful for. Also there are some palstic hoses running off a little plastic piece on the firewall I will circle it in the picture below in yellow i need to where the plastic hoses run from that thing.
P.S. Thank you ALOT
P.S. Thank you ALOT
Last edited by generalchase; 04-27-2010 at 11:58 PM.
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Car: 1987 Camaro Sport Coupe
Engine: 355
Transmission: 700R4
Axle/Gears: 7.5 inch 342
Re: need help with 91 firebird 3.1 vacuum hoses
That thing is a MAP sensor(manifold absolute pressure). hose should go to intake.
#4
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Car: 1987 Camaro Sport Coupe
Engine: 355
Transmission: 700R4
Axle/Gears: 7.5 inch 342
Re: need help with 91 firebird 3.1 vacuum hoses
just looked at my bird the map is conected to rear of the upper intake.
#5
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Car: 1991 pontiac firebird
Engine: 1991 3.1l LHO
Transmission: Th700r4
Re: need help with 91 firebird 3.1 vacuum hoses
thank you does the purge line from the charcoal canister empty in the passenger fender?
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Car: 1992 CAMARO RS
Engine: 3.1 V6 STOCK
Transmission: AUTO 700R4
Axle/Gears: 3.73
Re: need help with 91 firebird 3.1 vacuum hoses
you have a hose goes to the fuel pressure regulator that goes to the back of the throttle body and the map sensor goes to a port on back of the upper intake,also you have a vac line(from the back of the throttle body) going to the evap cannister to the passenger side,there is a third port on the block that is blocked as it is not used.Your cruise control shares a port on the back of the intake with the hot water valve,there is a check valve on that line before it goes into the port.
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#8
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Car: 1991 pontiac firebird
Engine: 1991 3.1l LHO
Transmission: Th700r4
Re: need help with 91 firebird 3.1 vacuum hoses
I bought the Pontiac service Manuel and here is the complete vacuum diagram.
Last edited by generalchase; 05-12-2010 at 01:40 PM.
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