Calling all Thermoquad Experts! again...
#521936
11/09/09 09:53 PM
11/09/09 09:53 PM
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Joined: Jan 2003
Posts: 857 The Dalles, OR.
Dusted_Ya
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 857
The Dalles, OR.
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Okay been having problems with my 73 440 thermoquad in cold weather not wanting to stay running until warmed up and today after the truck was warmed up and been driven around a little bit acted like it was going to stall so I tapped on the pedal to give it a shot of gojuice and it stalled anyways and then sounded like it ran backwards. Then it wouldn't start. I finally got it to start and run but now if I let off the gas it just stalls. No idle! I know I have to disassemble and inspect but what should I be looking for that might have went bad?
Retired Mopar fanatic
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Re: Calling all Thermoquad Experts! again...
[Re: Dusted_Ya]
#521951
11/10/09 01:33 PM
11/10/09 01:33 PM
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Joined: Jan 2003
Posts: 826 Stone Mt, GA.
DEMONSIZZLER
super gas
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super gas
Joined: Jan 2003
Posts: 826
Stone Mt, GA.
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Sounds like a lean condition. Generally speaking, a lean T.Q. will have a poor or no idle circuit until the engine and intake are warm enough for the fuel and air mix to atomize. At this point, the engine will gain most of the idle circuit but will likely still be lacking, David.
ThermoQuads:stock, street/strip and race;
800/850 cfm's, 860/910 cfm's and 1,000 to 1,060 cfm's.
New parts for all OEM 1971-1984, Competition Series and SuperQuad carbs and custom fabricating.
Carbs bought and sold. Consulting on pre-purchases
so you get the right carb the first time.
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Re: Calling all Thermoquad Experts! again...
[Re: Dusted_Ya]
#521960
11/10/09 11:15 PM
11/10/09 11:15 PM
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Joined: Jan 2004
Posts: 9,066 Eugene, Oregon
minivan
master
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master
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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Quote:
UPDATE: Well pulled the intake off and sure enough, as suspected, it was sucking oil and air from under the valley pan. Now I remember why I always say NEVER try to reuse gaskets... That must have been why the truck was running hot all the time! Also I have a new problem! Seems the reason why it's not been running right is because I have no spark sometimes!!! ARGH! [/quote
Curious about this... How can you tell it been doing that after pulling the intake?? What do you look for?
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Re: Calling all Thermoquad Experts! again...
[Re: Dusted_Ya]
#521964
11/11/09 01:42 AM
11/11/09 01:42 AM
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Joined: Jan 2004
Posts: 9,066 Eugene, Oregon
minivan
master
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master
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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Quote:
Assuming you are talking about sucking air from under valley pan? There will be oil all over your intake runners of the heads and valley pan.
thanks
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