LONG cranking before start-up
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Safety Car
Joined: Nov 2006
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LONG cranking before start-up
Ive got to hold the key to "start" for a LOOOONG time before the car will start, Ill be soon pulling the carb off to install the "quadrajet diaper" and Im leaning twards drilling them out, tapping it nd installing permanate ones
1. how do I do this? (drill, tap and replace plugs)
2. could there be some other cause for my problem?
Miles
1. how do I do this? (drill, tap and replace plugs)
2. could there be some other cause for my problem?
Miles
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
This has come up many times and the answer aleways seem to be the gas . With the Q-jet carb they are more prone to evaperation. I'm sure others will chime in on this one. The Edelbrock carb I used for a while always started right up. Put the Q-jet back on and it takes a bit of cranking.
Thread Starter
Safety Car
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Thread Starter
Safety Car
Joined: Nov 2006
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no feul leaking, I just went out to check, I drove it today from 5-530 and its now 8, and about 88 degrees out, the vette has ben running about 10-15 degrees hotter than before and I still needed to use towels to lift my air cleaner off its so hot, shouldent it be cooled by now? maby my fuel is evaporating rather than leaking from the plugs
Miles
Miles
Burning Brakes
Joined: Oct 2004
Posts: 920
Likes: 1
From: Shelby Township Michigan
I also have a '72 and had a similar problem. In the end, I had the carb rebuilt and it fires up hot or cold with no problems.
If you are concerned about fuel evaporation, before starting the car, remove the air cleaner lid and hand actuate the accelerator pump. If you see fuel squirting in, this is not your problem.
What is your timing set up at? Have you recently tuned the car? Are you running points and have you replaced your wires lately?
Good luck,
Dino
If you are concerned about fuel evaporation, before starting the car, remove the air cleaner lid and hand actuate the accelerator pump. If you see fuel squirting in, this is not your problem.
What is your timing set up at? Have you recently tuned the car? Are you running points and have you replaced your wires lately?
Good luck,
Dino
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Thread Starter
Safety Car
Joined: Nov 2006
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I also have a '72 and had a similar problem. In the end, I had the carb rebuilt and it fires up hot or cold with no problems.
If you are concerned about fuel evaporation, before starting the car, remove the air cleaner lid and hand actuate the accelerator pump. If you see fuel squirting in, this is not your problem.
What is your timing set up at? Have you recently tuned the car? Are you running points and have you replaced your wires lately?
Good luck,
Dino
If you are concerned about fuel evaporation, before starting the car, remove the air cleaner lid and hand actuate the accelerator pump. If you see fuel squirting in, this is not your problem.
What is your timing set up at? Have you recently tuned the car? Are you running points and have you replaced your wires lately?
Good luck,
Dino
Ive got new wires, gapped my points and replaced my plugs about a year ago, timing not so sure on...butI didnt have this problem 2 weeks ago before the carb rebuild (I did myslef, not professional)
Miles
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Miles
Hopefully someone more experienced with the Q jet will chime in to answer your question.
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bump, how do I know when Im not running too rich or lean?
Ill prob. try it today, when I remove the carb to drill the plugs would it be OK to just leave my metering jets in the position they are in, or would I have to start from sctratch?
also I just went out and oushed my accelerator pump down and NO fuel was being squirted, so Im assuming my fuel is evaporating, what do I do about this?
Miles
Ill prob. try it today, when I remove the carb to drill the plugs would it be OK to just leave my metering jets in the position they are in, or would I have to start from sctratch?
also I just went out and oushed my accelerator pump down and NO fuel was being squirted, so Im assuming my fuel is evaporating, what do I do about this?
Miles
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
How about the choke? Even in warm weather a choke is needed for quick start of a cold engine. I have an electric choke on my Qjet. Just pump the gas to set the choke and fire it up.
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Safety Car
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I set the choke everytime I start it up, Im just thinking there is NO fuel in my fuel bowl, how its getting out Im not quite sure: evaporating, leaking out from the two plugs, or just syphoning back into the tank
Siphoning back to the tank can also empty bowls but my point was "if" the plugs were leaking he would have to fix them.If you do end up with an empty bowl after sitting all night you just have to determine. what is causing it.One way to eliminate the siphoning back to the tank is to clamp the rubber fuel lines at the pump and if its still emptying its not siphoning.
which rubber hoses are the ones mentiones in the quote? Ill plug them tonight to check
Miles
Siphoning back to the tank can also empty bowls but my point was "if" the plugs were leaking he would have to fix them.If you do end up with an empty bowl after sitting all night you just have to determine. what is causing it.One way to eliminate the siphoning back to the tank is to clamp the rubber fuel lines at the pump and if its still emptying its not siphoning.Miles
Burning Brakes
Joined: Aug 2007
Posts: 1,173
Likes: 1
From: Liberty Missouri
EDIT>>No need to "plug" just clamp it off with a pair of vice grips
Last edited by Theiskell; Jul 20, 2008 at 02:35 PM.
Thread Starter
Safety Car
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Burning Brakes
Joined: Aug 2007
Posts: 1,173
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From: Liberty Missouri
I’m not sure how your fuel lines are ran. I ran hard line all the way up to my carburetor so the only place I could clamp off a line is where the flex line goes into the fuel pump. If you have rubber line in other places I would say start at the carb and work back to the fuel pump a section at a time. I don’t know of a quick way to do it…. just clamp off a section overnight and see if you have fuel in the bowl the next morning if you do, work back until you don’t and that will be where your problem is.
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Safety Car
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Ill crimp it off after a ride it it today
What kind of epoxy should I use on the plugs (after drilling and taping)? and how will I know if Im running just right on my fuel mixture?
Thanks so much everyone for all the help so far! every responce hase been extremely helpfull
Miles
What kind of epoxy should I use on the plugs (after drilling and taping)? and how will I know if Im running just right on my fuel mixture?
Thanks so much everyone for all the help so far! every responce hase been extremely helpfull
Miles