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1987 Chevrolet Blazer Repair Question


Topics covered: Engine, Engine mount, Fuel pressure.
Mileage: No information provided.

Asked on March 27, 2012

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?

Avatar Asked by xironworker

Answer

Replied on March 27, 2012

Check the actual fuel pressure with a gauge if its within specs-

Tiny Answered by rasmataz
68 questions asked
Replied on March 27, 2012

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.

Tiny Answered by Wrenchtech (expert)
14,743 answers provided
Replied on March 27, 2012

what pump system do you suggest i run?

Tiny Response from xironworker
1 question asked

Replied on March 28, 2012

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.

Tiny Answered by Wrenchtech (expert)
14,743 answers provided
Replied on March 28, 2012

thanks i will run engine mounted mechanical pump.

Tiny Response from xironworker
1 question asked
Replied on March 28, 2012

You need a different tank first.

Tiny Answered by Wrenchtech (expert)
14,743 answers provided

Replied on March 28, 2012

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?

Tiny Response from xironworker
1 question asked
Replied on March 28, 2012

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.

Tiny Answered by Wrenchtech (expert)
14,743 answers provided