1998 Chevy S-10 Fuel Pump problems

1998 CHEVROLET S-10
120,000 MILES • 6 CYL • 2WD • MANUAL
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POPO2965
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I have a chevy S10 1998. Couple of days ago the "engine service" light went on, I disconneted the battery for turn it off.
2 days ago the fuel pump won't function, I checked the relays an connections, some one told me that the problem migth a faulty pump. Sudenly the pump started to work I used the truck an the next day again stopped functioning. I rechecked the relays connection etc. yesterday the pump"miracleously started I used the car, today in the morning too but not in the afternoon. Its weird because looks like the pump function ats it own. the engine light is on again. I read the books an mention something about a oil pressure relay etc. I am turne crazy, because looks that its not the pump, its something electrical
please help

R
Aug 29, 2009 at 6:49 PM
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RASMATAZ
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When you turn key to run do you hear the fuel pump? if not check ECM B fuse, fuel pump relay if so check the fuel pressure with a gauge and comeback with some results. Als check for injection pulses.
Aug 29, 2009 at 6:55 PM
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POPO2965
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Hello
thanks, yes I checked that fuse and the relay, both are OK noow where I should checks, or diconnect line for check the fuel pressure?
the pump is still functionig randomly

your help is extremely appreciated

R
Sep 3, 2009 at 11:57 AM
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RASMATAZ
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You need to actually hook-up a fuel pressure gauge to read the pressure to determine if its within specs.
Sep 3, 2009 at 1:59 PM
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JOERIN42
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My 94 S-10 would not start on certain days for about a month and left me in some not so nice positions at different times. I put a pop cycle stick down into the throtle body and turned it over, and had gas. I had spark. Battery was excelent. Somedays it would not start and the next it would. So I changed the timing chain. And after that it ran great, for about 2 days. On the 3rd day, it wouldn't start and I didn't hear the pump operate. As it turned out, the tank had a hole in it, and the sending unit was too. So if your S-10 starts today, but not tomorrow, chances are it's the pump. Good luck. I spent $600 for tank, pump, sending unit and several lines.
Sep 13, 2009 at 9:57 PM
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