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Old 03-05-2011, 10:38 AM   #11
ChevyTech
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Join Date: May 2004
Location: Minnesota
Posts: 4,620
Re: 87 Chevy 350 TBI low Idle issue

The fuel pressure regulator is in the TBI unit.

You could have dual tanks with two perfect fuel pumps and still have low fuel pressure.

The fuel pressure regulator springs break.

Here is photo of a fuel pressure regulator spring from a vehicle with a surge:

Photo from this thread, which has some good information:
http://67-72chevytrucks.com/vboard/s...d.php?t=347247
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
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