Thread: carb swap!
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Old 07-31-2008, 07:30 PM   #77
maroman88
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update!

got a 5 gal can of gas... now im actually getting a reading on the FP guage....

start the car... got it to run awesome! then the carb floods and car stalls. i lowered the regulator down to 3psi, as low as possible, and the same thing accurs....

i went back to all the paper work that came with the regulator and noticed it says the return line should be equal size or larger the then input line (from tank to regulator)... well the stock return line is one size SMALLER then the input line and it appears that the fuel is just backing up and pouring into the line to the carb.

if i pinch the line running to the carb and release as fuel is needed it will run perfect, but if i leave it alone again it floods and stalls...

i didnt read about this problem anywhere from the tpi to carb swap sites.... maybe since my car was originally TBI it had a smaller return line then TPI cars???

if thats the case only thing i can think of would be to pop in a TBI pump since they only run at 15ish psi IIRC as opposed to the 50ish psi for the TPI pump, thus allowing the regulator to not get backed up with the smaller return line..... if that makes annnyyyy sense lol
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