Fuel Fuel Filter Bone Dry

[85foxman]

Ok guys, I'm stumped...my car seems to run on air...my car runs 5.5-6.5 psi for fuel pressure between mechanical pump and Carb but the fuel filter before the fuel pump is dry. My car starts kinda hard after driving and sometimes stalls while coming to a stop...any ideas? I'm running a 306 E cam 1405 edelbrock Carb with a summit racing mechanical pump.

 

[85rkyboby]

You should put the fuel filter between the pump and carb. Those pumps are meant to pull, with the filter before it strains the pump.

 

[85foxman]

I had the filter between the pump and carb and it did the same thing...I even dropped the tank to check the pickup filter and that was clean so now I'm stumped on why the filter is dry.

 

[85rkyboby]

Do you have a return line on yours?

 

[85foxman]

There is but its not hooked up under the hood...its clear because I blew through it when I had the tank out

 

[85rkyboby]

Is this while the engine is cold or hot, could be the choke? Did you adjust the carb or what? Is the fuel filter new or old? Have you looked for vacuum leaks by any chance?

 

[85foxman]

Its usually when its warm when it starts hard and stalls.

 

[85rkyboby]

electric or manual choke? Did you adjust the choke at all? Is the fuel filters new? Have you checked for vacuum leaks?

 

[85foxman]

Its a manual choke...no vacuum leaks...filter has 1500 miles on it...the choke isn't hooked up.

 

[85rkyboby]

what brand carb bro?

 

[85rkyboby]

Nevermind lol.

Sorry its late. What firing order are using for that cam?

 

[85rkyboby]

any other mods besides that cam? I have the same carb and they tune easy but I don't care for them performance wise unless on a stock motor. What pump are you running? You said the return is not hooked up under the hood. Do you have the return port capped off? Just trying to see how its not hooked up. Thanks, hang in there.

 

[85foxman]

I'm using the HO firing order...headers...chrome summit racing high volume mechanical fuel pump...the return line is open under the hood and hooked up on the tank...thanks for your help

 

[85rkyboby]

Have you tried using the regular firing order or even the 351? Some cams require the 351 order on 302, not likely but something to check into. Have you ran it with the return hooked up? Only other thing I can think of is bad pump... well back to the carb what are you idling at?

 

[85rkyboby]

No problem. I'm still new to the game of carbs and mustang for that matter but I have tackled what seems to be a ton of problems haha. I'm always adding new parts that seem to bring a world of trouble with them.

 

[85foxman]

Like I said the engine runs fine other then the dying sometimes at stop signs and it starts kinda hard once in a while...it idles at 1000rpms

 

[85rkyboby]

Hmmm. Its idling kind of high you could try backing it down but other than that I'm stumped. Maybe somebody will chime in to help in the AM. I'll ask a couple buddies of mine tomm., well in the morning.

 

[85foxman]

I've been battling this for 4 months now...its like its vapor locking but it doesn't effect running...I don't know if this matters but the car has 5/16 fuel line and my pump is 3/8

 

[85rkyboby]

If its vapor lock fix that return line. I still have mine hooked up. Na, I'm running the same stock lines and carb. only difference is our pump.

 

[85foxman]

Fix what with the return line? I have no place to hook it to under the hood...if I plug it nothing changes...sorry for seeming difficult...thanks for the suggestions