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#1 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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emergency engine help needed
im on vacation 350 miles from home and my truck is giving me major problems. the first half of the trip went very well. then i noticed that my milage started to suck. when i would come to idle, the truck would barely idle and the exhaust was rich and smelled like raw gas. i pulled over and pulled my carb of (qjet) and disassimbled it. i noticed that there was fuel puddled in the intake. i then bent the float down a little and it made it run better but it still idled rough. i called sean murphy and he said that the fuel pump may have gone out and was putting too much p.s.i. out. im going to change out the pump tomorrow. is there anything else i might be missing.
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
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#2 |
Registered User
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
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Re: emergency engine help needed
did a vacuum line come off the tranny or elsewhere?
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#3 |
Step Brother
Join Date: Sep 2007
Location: K-town
Posts: 4,029
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Re: emergency engine help needed
![]() Last edited by Cyclone44; 03-17-2008 at 09:19 AM. |
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#4 |
Registered User
Join Date: Feb 2002
Location: Vacaville, CA
Posts: 2,746
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Re: emergency engine help needed
Is the Q-Jet from Sean? If not the well plugs could be leaking badly and cause this (if Sean built the carb he usually takes care that those won't leak). Just another possibility. Also check the needle valve for dirt holding it open.
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![]() ![]() 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI |
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#5 |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,521
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Re: emergency engine help needed
Here are the numbers for the emergency contact list in this post by Josh:
http://67-72chevytrucks.com/vboard/s...d.php?t=159313 You might give that a try. LockDoc
__________________
Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 03-17-2008 at 08:37 PM. |
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#6 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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Re: emergency engine help needed
i will check the vacuum line. im in south padre island tx. im about to get the new pump on and i will let yall know.
__________________
1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
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#7 |
Registered User
Join Date: Jan 2007
Location: South Florida
Posts: 158
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Re: emergency engine help needed
The float may be bad. They will absorb fuel and sink causing the motor to run rich and flood out.
Rob |
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#8 |
Registered User
Join Date: May 2006
Location: North x Northwest BC
Posts: 62
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Re: emergency engine help needed
My guess too would be dirt in needle float valve....had a simular problem and it eventually cleaned itself...ran like crap and would not idle for a while though since it was getting to much fuel.
This happened after a fuel filter change on the carb (Q-jet) |
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#9 | |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: emergency engine help needed
Quote:
Anyway, I've had the same problem in the past and it's always been the carb. As mentioned above, I'm with the carb group. I've had to clean the bowl out real good and either replace or clean the needle valve, the seat and also make sure the float is good. Please let us know what you find. Last edited by 68gmsee; 03-18-2008 at 05:34 PM. |
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