Hie everyone.

I have a bit of a problem with my truck carb. I have experienced som problem with "blowouts" both thru the exhaust and the carb. Not often by now and then. So I dissassambled the carb in the believe of that it got to much fuel. What I found was a set of 35 jets????? is this ok or not??. I believe that it would be somewhere arond 48, someone told me, anyone??.

If i screw in the air/fuel mixture screws to the bottom the engine still runs, defenetly not good but it runs.

I have also tried spraying "startgas" in swedish sorry, arround the intake and carb to look for vacume loses. But it was all good.

In what end would I start, New jets, renovation kit......... suggestions.

All info and help gladly appreciated.

 

C3TF-9510-K = C3TZ-9510-U (Auto-Lite/Motorcraft CA-271)

Original application: 1963/64 F100/700 292 2V

1964/72 Ford Truck Parts Catalog / Carburetor Parts List #14A

D4AZ-9A586-A .. Carb Kit (Motorcraft CT-499-D)

78-9533-B .. Jet #48 / 0-5,000 ft. (Motorcraft CJ-55)

C1AZ-9533-B .. Jet #46 / 5,000-10,000 ft. (Motorcraft CJ-20)

C1AZ-9533-F .. Jet #44 / 10,000-15,000 ft. (Motorcraft CJ-24)

Ford sold Auto-Lite circa 1971, then started Motorcraft, retaining the original Auto-Lite part numbers.

 

usually, these 'blowouts'... backfires... indicate a lean condition... but this is not a 'tell all'.

yes, to me it sounds like the jets are too small... and by what Bill posted confirms....

 

You have a blown power valve. that's why it idles with the screw all the way in.

 

Thanks everyone.

I would be surprised if the powervalve is blown judging by the backfires I have been experience

Is it possible to see on the powervalve, if I dissassamble the carb, visually that it is Blown? I took a look at it here the other day but I could see any visual damages on it.

If I buy the carb kit that Numberdummy referes to does it include the part for the powervalve as well.

Best regards Jimmy

 

Numberdummy:

What am I doing wrong? I cant find the jets part number on FTEPARTSGUY.com

Best regards Jimmy

 

Yes, the power valve is included.

D4AZ9A586A .. Carb Kit (Motorcraft CT-499-D) **

Available from Ford

MSRP: $31.52 / ftepartsguy.com price: $18.91

This kit fits all Ford 2V carbs from 1962 thru 1974.

I listed the jets for your information, they are no longer available from Ford (they do not come in the kit)...I'll see if I can find them elsewhere.

** When typing part numbers into the website = REMOVE the hyphens, as I did above.

 

Thanks

I found the carb kit, and that is a definit buy, but I also need the jets.????

I am at the moment looking around on different webshops to find the jets.

Best regards

 

I found the #48 jets, I sent you a P/M on who has them.

If you want the others I listed, I'll look for those, too.

 

It would be great if you could find the other as well

I appreciate your effort very much

Thanks Numberdummy

 

Straight from Holley's(I know you have a A.L.) web site.


If you have a carburetor older than 1992 (or you have experienced
an extreme backfire) and expect a blown power valve,
use this simple test. TEST: At idle turn your idle mixture screws
(found on the side of the metering block) all the way in. If your
engine dies the power valve is not blown.

 

I found 2 of the C1AZ9533B's (#46) and 1 of the C1AZ9533F's (#44)

The same place has these that has the #48's.

EDIT: The other Ford obsolete parts source I search, doesn't have any.

 

I say fix your blown P.V. first then you can play with the jets, I think you can do the jets "on the truck" anyways.

When you take the PV out you can suck on one side of it and if it lets air pass the diapham is ruptured(I will be)

 

The power valve that comes in the carb kit is: 0-5,000 ft. = C0AZ9A565B

There are two others that do not come in the kit:

5,000-10,000 ft. = C3AZ9A565D / & / 10,000-15,000 ft. = C0AZ9A565A

Found 10 each of all three at the same place that has the jets...see post #12.

 

Thank you very much numberdummy I will contact them and see if they can ship them me in sweden othervice I will visit Fort Laudon v 20, maybe they can ship them to the factory there.

Thanks again what would I do without the internet and guys like U

You made my day