No Thunder in the THUNDERJET
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No Thunder in the THUNDERJET
Well I'm 'bout ready to give up and take it to my mechanic...I haven't rebuilt the carb (2brl), but that's about all...Starts good, but skips, good bit of white
smoke, will run for quite a while then suddenly cut off like it's not getting fuel.
Restarts ok but shuts off sooner...I can keep it going by feathering the accelerator, but if I let up it will die???
How does a 67 fuel tank vent ?
Thanks,
Mike
smoke, will run for quite a while then suddenly cut off like it's not getting fuel.
Restarts ok but shuts off sooner...I can keep it going by feathering the accelerator, but if I let up it will die???
How does a 67 fuel tank vent ?
Thanks,
Mike
Lead Driver
Joined: Jan 2003
Posts: 9,893
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From: Ohio
White smoke is not good. That usually means anti-freeze leak. What do the plugs look like? Any one of them look covered in white ash? Or is it just really cold were you are at?
There is no vent in these trucks. Usually I get a good whoosh of air when I take cap off my trucks when I run the tank down low.
Doesn't sound like that is the issue do to truck running when you pump the throttle. If it was not getting gas, it wouldnt run at all.
What's the "skip" about. A miss? Constant, or random. Consistent til truck quits?
Only when you pump pedal? That's accel pump not keeping up which is a common thing with those Autolite carbs. Linkage gets stiff and spring doesn't have enough tension to keep accel pump tight with throttle linkage. Thus it doesn't always get a good shot when you stab at pedal.
There is no vent in these trucks. Usually I get a good whoosh of air when I take cap off my trucks when I run the tank down low.
Doesn't sound like that is the issue do to truck running when you pump the throttle. If it was not getting gas, it wouldnt run at all.
What's the "skip" about. A miss? Constant, or random. Consistent til truck quits?
Only when you pump pedal? That's accel pump not keeping up which is a common thing with those Autolite carbs. Linkage gets stiff and spring doesn't have enough tension to keep accel pump tight with throttle linkage. Thus it doesn't always get a good shot when you stab at pedal.
Posting Guru
Joined: Sep 2003
Posts: 2,313
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From: Northeast LA
My truck was doing like this it would crank just fine and idle but after it warmed up it would die. A guy I had look at it told me the idle mixture screws were messed up and there was some pitting in the carb and it wouldn't let it idle right. I ended up buying a brand new holley 4412 and put it on there, and I have loved it since I put it on. It ran great right out the box. Just my .02 Hope you get it figured out.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
The gas tank is not vented, the gas cap IS!!
IF you have a non vented gas cap on your truck, that may cause the gas tank to collapse.
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Ford 2V carbs of this vintage have a crappy accelerator pump diaphragm and check valve.
When these little charmers go bad, when accelerating from a dead stop, or at speed, the vehicle tends to bog down, hesitate, acting like the motor wants to die.
Both these parts come with the carb kit or can be purchased separately.
D4AZ-9A586-A .. Carb Kit (Motorcraft CT-499-A)
C4AZ-9B559-A .. Accelerator Pump Diaphragm (Motorcraft CM-463)
C4AZ-9576-A .. Accelerator Pump Check Valve (Motorcraft CM-825)
CAVEAT EMPTOR: The accelerator pump & check valve are inside a 4 bolt cover with a lever on it, located at the front of the carb.
There's a COIL SPRING behind that cover, so take care when removing it, otherwise the spring will fly out.
IF you have a non vented gas cap on your truck, that may cause the gas tank to collapse.
--------------------------------------------------------------------------------------
Ford 2V carbs of this vintage have a crappy accelerator pump diaphragm and check valve.
When these little charmers go bad, when accelerating from a dead stop, or at speed, the vehicle tends to bog down, hesitate, acting like the motor wants to die.
Both these parts come with the carb kit or can be purchased separately.
D4AZ-9A586-A .. Carb Kit (Motorcraft CT-499-A)
C4AZ-9B559-A .. Accelerator Pump Diaphragm (Motorcraft CM-463)
C4AZ-9576-A .. Accelerator Pump Check Valve (Motorcraft CM-825)
CAVEAT EMPTOR: The accelerator pump & check valve are inside a 4 bolt cover with a lever on it, located at the front of the carb.
There's a COIL SPRING behind that cover, so take care when removing it, otherwise the spring will fly out.
Lead Driver
Joined: Jan 2003
Posts: 9,893
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From: Ohio
If the noise is from the tailpipe, then sounds like a misfire. Could be a few things, from simple to drastic. Plugs, wires, burnt valve?
Can't really see how it would be the timing chain. It's either working, or not. Could have jumped, but usually will continue to jump every time you shut it off(or try to start it). Usually not a once shot and then okay.
Can't really see how it would be the timing chain. It's either working, or not. Could have jumped, but usually will continue to jump every time you shut it off(or try to start it). Usually not a once shot and then okay.
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