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93 formula fuel problems

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

93 formula fuel problems

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Old

Feb 8, 2009 | 04:51 PM

#1

Black93_Formula

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Staging Lane

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93 formula fuel problems

well i was mainly wondering how can you for sure tell your fuel pump or fuel relays are bad because i figured out wut i thought was tranny problems is because my fuel pump is bad. the engine back fired and lost power and showed the same symptoms of when a fuel pump goes bad. (ive been driving a vehicle when this has happened) any input would b helpful. thanks

Old

Feb 8, 2009 | 05:42 PM

#2

TECH Junkie

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From: LA$ VEGA$

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get a gauge and test fuel pressure before you go spending money.
be ready to do a fuel pump

Old

Feb 8, 2009 | 08:23 PM

#3

TECH Senior Member

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From: Orange County, CA

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Quote:

Originally Posted by 96lt1m6

get a gauge and test fuel pressure before you go spending money.
be ready to do a fuel pump

+1. Reading the fuel pressure is the only way to tell if the pump is going bad. The fuel pump relay will work or it won't, if it's bad, you'll have no pressure at all and the pump won't come on.

Old

Feb 8, 2009 | 08:29 PM

#4

12 Second Club

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From: Lincoln CA

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if its the fuel pump i would recomend the trap door metted to changing it.its a lot easier the dropping the tank

Old

Feb 8, 2009 | 08:30 PM

#5

Black93_Formula

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alright thanks guys. hopefully i wont have to replace the pump cuz ive done it before on other vehicles and its not somthin i wanna do again lol

Old

Feb 8, 2009 | 10:41 PM

#6

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From: Decatur, TN (N-W of Athens)

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And to make sure it's a relay, you can swap with another one (make sure they're the same), or just hotwire the pump at the relay (bypass the relay).

Old

Feb 8, 2009 | 10:45 PM

#7

Black93_Formula

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Staging Lane

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ok thx man. wut should be the normal fuel pressure range?

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Old

Feb 9, 2009 | 12:46 AM

#8

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From: Decatur, TN (N-W of Athens)

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39 key on, ignition off. ~41psi idle with vacuum line ON and about 43.5 idle with vacuum line OFF (of the regulator that is).

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1993, 93, bypass, firebird, flowmaster, formula, fuel, located, location, problems, pump, relay, removal

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