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Engine Specific Tech
94-95 5.0 - Specific
fuel pump question
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<blockquote data-quote="MustangChris" data-source="post: 911534" data-attributes="member: 10830"><p>fuel pumps rarely "go bad" like a mechanical device. these are electric units. They are either broken, or working.</p><p></p><p>if you think its the fuel pump, i suggest cleaning your MAF. Unplug your battery for 5 minutes and plug it back in. If that doesnt help, and you still think its your pump:</p><p></p><p>then, i would go to the trunk, dig out the wires that run to the pump and check them with a meter.</p><p></p><p>Fill the car 1/2 full of gas (the pumps are fuel cooled, be sure to try and always stay at least 1/2 full) with gas from a "different" station. if you go to the same station every time for your gas, and they got a bad batch, you could be filling your car with bad gas for months... (dont fill the car all of the way up, as you may have to drop the tank.)</p><p></p><p>after this, i would test your fuel pressure at the rails. this is a simple process.</p><p></p><p>if all this goes okay, let us know.</p><p>and we'll go from there.</p><p></p><p>a 302 expert will have to chime in to tell you what kind of numbers you should expect on the meter, what fuel pressure you should see at the rail, etc. etc.</p></blockquote><p></p>
[QUOTE="MustangChris, post: 911534, member: 10830"] fuel pumps rarely "go bad" like a mechanical device. these are electric units. They are either broken, or working. if you think its the fuel pump, i suggest cleaning your MAF. Unplug your battery for 5 minutes and plug it back in. If that doesnt help, and you still think its your pump: then, i would go to the trunk, dig out the wires that run to the pump and check them with a meter. Fill the car 1/2 full of gas (the pumps are fuel cooled, be sure to try and always stay at least 1/2 full) with gas from a "different" station. if you go to the same station every time for your gas, and they got a bad batch, you could be filling your car with bad gas for months... (dont fill the car all of the way up, as you may have to drop the tank.) after this, i would test your fuel pressure at the rails. this is a simple process. if all this goes okay, let us know. and we'll go from there. a 302 expert will have to chime in to tell you what kind of numbers you should expect on the meter, what fuel pressure you should see at the rail, etc. etc. [/QUOTE]
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fuel pump question
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