I have an 1987 chevy s-10 blazer with a carburated 283cid engine. Fuel pump is in gas tank. My vehicle starts running poorly and I notice my fuel pressure regulator reads 2lbs so I turn it up to 4.5lbs runs great for a few miles. Then the pressure reads 2lbs
i have to keep adjusting my fuel pressure regulator back up to 4.5lbs do you think my regulator or my in tank pump is going bad?
Check the actual fuel pressure with a gauge if its within specs-
March, 27, 2012 AT 10:48 PM
If you converted that system from a return type system to a returnless using a regulator, you will just fry the pump. Those pumps aren't designed to run that way.
March, 27, 2012 AT 11:56 PM
What pump system do you suggest I run?
March, 28, 2012 AT 12:02 AM
It's a conversion that really should never have been attempted. It requires a different fuel tank and external fuel pump, preferably the engine mounted factory pump. These modifications aren't even legal to do.
March, 28, 2012 AT 12:08 AM
Thanks I will run engine mounted mechanical pump.
March, 28, 2012 AT 12:09 AM
You need a different tank first.
March, 28, 2012 AT 12:49 AM
Can I not just pull the pump put back the sender, then put an in line pump and a mechanical on the block. Plus the regulator?
March, 28, 2012 AT 12:54 AM
No, because the sender will no longer reach the bottom of the tank and you will have an extra line going into it. It also requires a vented tank which is illegal now. You can't just think you are going to "old school" and EPA certified car. The fines start at $2500.