1998 Chevy S-10 Fuel Pump problems

POPO2965

MEMBER
1998 CHEVROLET S-10
6 CYL
2WD
MANUAL
120,000 MILES

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

4 Replies

RASMATAZ

MECHANIC
75,992 POSTS

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.

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Saturday, August 29th, 2009 AT 6:55 PM

POPO2965

MEMBER
1 POST

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

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Thursday, September 3rd, 2009 AT 11:57 AM

RASMATAZ

MECHANIC
75,992 POSTS

You need to actually hook-up a fuel pressure gauge to read the pressure to determine if its within specs.

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Thursday, September 3rd, 2009 AT 1:59 PM

JOERIN42

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8 POSTS

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.

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Sunday, September 13th, 2009 AT 9:57 PM