ok guys heres the deal, when i bought my car it had sat in the guys back yard for 5 years, and then sat in my garage for another 1 or 2. now i changed the fuel filter a year ago it did fine, but a couple or months ago it was studdering and stalling real bad so i was praying it wasnt the fuel pump and changed the filter again. Well i was relieved to see that it cured the problem, at least for a little while, well a few days ago it started doing it again and im a little baffled, do you think that from sitting for so many years the gas crapified in the gas and now is clogging up filters like a mo fo, or do you think my fuel pump of pressure regulator is going bad. car profile is in the sig. thanks in advance

 

i'd drop the tank and take it to a radiator shop to be cleaned, there has to be lot of trash in it from the old fuel. my 68ss was same way from sitting for 20 plus years not being driven.

 

so you think thats what it is, you dont think my fuel pump is going bad, because i drove it for like a year before it started doing this, but for a year or so it was only slighty modified, ive picked up about 50-60 hp since then.

 

you can check the preasure on the fuel pump to see if it's with in spec or not, if it is i'd suspect dirt i nthe fuel system.

 

Yeah, I had the same problems when I got my car last year and it was dirt in the fuel system. Replaced the fuel pump while we were in there anyway though....

 

This is a very common problem for motorcycles as well. When gasoline evaporates, many components will precipitate out as various types of crud (technical description). The problem is, when you add fresh gasoline that in itself is insufficient, oftentimes, to re-solubilize those deposits. That's why, as was mentioned, you need to drop & clean the tank, flush lines, clean carbs, etc.

When I know that I am not going to be riding my bike for a while, I shut off the petcock and let the motor idle away the gas in the carb. Saves a lot of subsequent work months or years later. I know that's not too practical for injected cars but you might consider the use of a gas stabilizer. My wife and I use that in the fuel tank of our emergency generator.

 

if you let gas sit for too long it turns into terpintine (useless gas).

 

if you clogged up the fuel filters that fast then the filter (AKA Pick up "sock" )on the pump is most likely clogged too.