I have been working on a truck i bought checked timing new plugs wires cap and rotor cleaned up carb and new gaskets changed in line plastic filter but I still missfires when I get about 3/4 throttle to w/of. I haven't got to the filter at the tank yet and I noticed front drive line had broken at sometime pinching the hard lines under the cab could that be my whole problem

 

IF (big IF) it is carb related did you adjust the float level while it was open? And, which Weber and is there a fuel pressure regulator going into it?
Also, which engine?

 

It's a 22re no regulator yes floats were adjusted carbs 32/36 electric choke. I notice that the clear fuel filter only has maybe 1/8 inch of fuel at all times shouldn't it be full

 

Was going to replace filter by tank and patch the hard lines that are pinched today see if that helps me out

 

Can't say if no reg is your current problem but just about all Webers (DGs, DCOEs, etc) need a regulator set at 2.5 psi (IIRC).
The pinch at the steel line may be acting like a regulator.
On filters where I can see the fuel it usually seems to be 1/2 to 1/4 full when not running.
Also, beware of the clear glass filters, they look nice but the o-rings can deteriorate and cause problems (fire) - been there.

When you cleaned out the carb did you blow out ALL the jets and passages? Also, what was in the bowl when you opened it?

 

I would say it depends on how crunched the fuel lines are; it wouldn't be acting as a pressure regulator, but rather a flow regulator. If it can only manage to keep the fuel filter 1/8 full I'd either say the flattened lines are restricting flow or you have a weak fuel pump. Is the fuel filter before or after the fuel pump?

 

It is before the pump I traced the pinched lines to find its the vent and return lines. Previous owner has re_routed the main fuel line

 

So far I've changed both filters tried another coil and igniter could it be the mechanical fuel pump? I guess I've never had one fail

 

Sounds to me like your best and cheapest bet is going to be getting a fuel pressure gauge on the line (close to carb). FPR and gauge combo would be best, but diagnosing what the problem is would be a lot easier if you knew what kind of pressure you were getting.

I have heard of people having their mechanical pumps loose pressure. They would still pump, but weren't up to the task when pressed.

 

I would say it's the mechanical pump. They die from time to time, a lot more often than electric pumps. That would be a cheap place to start, but as Bingle said, a fuel pressure gauge wouldn't be a bad idea either.

 

Just to be clear here you have a 22RE that was converted to a Weber carb correct?

 

Yes it's an re motor with an offenhouser intake and weber. I guess I will try a gauge and regulator and go from there

 

Didn't the RE engines have an electric pump?
and
Did you find debris in the fuel bowl and filter when you looked at them?

 

Yes Its a 84 truck that they put the re motor in with the webber and intake. I bought regulator and gauge new ngk iridium plugs and it fixed my backfire. Guess the plugs fouled do to excessive fuel still have a slight leak around carb base it runs a Lil ruff at cruising speed but overall it's much better

 

If the fuel pressure regulator is set a 2 - 2.5 psi and you still have a leak then you probably have another problem.
On a Weber you can over tighten things. The screws and any other screwed in part (jets etc.) should be snug but not heavily cranked down.

 

Ten 4 ya I have a 1 peice adapter for carb to manifold the webber kit came with one base gasket so tried to reuse the one on the bottom but it's looking like I need to replace it i have the pressure set at 3.5 should I go down 2.5

 

3.5 is way too much - 2.5 max. Yes a new gasket. I always kept a spare carb kit around when I had a 32/36 they're not expensive.

 

I'll have to tinker on it tomorrow get a new gasket and turn down pressure see how she dose