I have a 1997 Chevy S-10 4WD/ Auto/4.3; has anyone found that a faulty oil pressure sensor causes the ECM to shut down the fuel pump?

Asked by Sep 30, 2014 at 11:57 PM about the 1997 Chevrolet S-10 2 Dr LS 4WD Extended Cab SB

Question type: Maintenance & Repair

Started the truck cold on a morning a couple of weeks ago, drove about 2.5 miles and it just shut down.  Wouldn't start again.  Felt and sounded like it was out of gas, so I borrowed a gallon, poured it in and tried again, cranked but would not start.  Thought gas level might still be too low somehow so went and bought 5 gallons and a can of cold start.  The added gas did nothing, but when I cranked the engine and sprayed the cold start into the air intake, it sputtered and started.  Good, thought that was it and drove away another 1/2 mile when it happened all over again.  This time no amount of cranking, ether, battery jumps, etc. produced anything.  Three hours later we towed it home. I could hear the fuel pump coming on, but no start. I found almost no pressure at the fuel line test port, concluded the filter was probably clogged, changed it, found better volume at the test port, but not much better pressure.  Still no start.  Changed the pump figuring the problem was either with the pump or the pressure regulator and thought the pump an easier fix.  Still no start. Fuel pressure reading at first key on/engine off cycle was about 5lbs.  Cycled it again and it rose to about12lbs, again and pressure rose to 25lbs. Did this again and again until at about the 5th or 6th time it arrived at something over 60lbs briefly then fell to 52lbs, where it remained.  If it fell at all after that it was very slowly. I had been told that the injector required 61-65 lbs pressure to fire.  So I concluded the pressure regulator was at fault.  Replaced the regulator, started the truck, checked the fuel pressure again with engine running and it read 52lbs!  Fine!  Some wrong info;  Gave it gas and the RPMs went right up.  Problem solved.  Thought a test drive was in order.  Drove about 2.5 miles, the engine died, and here we are again.  It seems to me that something is turning the fuel pump off after the engine has been running a little while.  Could it be the oil pressure sending unit is sending a bogus signal to the ECM and triggering this problem?

5 Answers

58,415

Or a bad fuel relay,

2 out of 2 people think this is helpful.
31,265

Yeah or both.

10,090

I think AutoZone will test the relay for free.

615

It could also be the 'Gas Tank Filter" & 'Not the 'In-line Filter'... Sediment that is sucked up thru this filter from inside the gas tank can get clogged as well. Check to see if the 97' S-10 has this filter and let us know, ok?

Hi! The trouble turned out to be a faulty ignition control module. I had it tested at the beginning of my effort to repair the truck but it tested OK. However after making all the rounds and finding nothing worked, I retested the module at two 'other' parts stores and it came up BAD. Returned to the original testing location, retested and the unit was declared 'good'. Bought a new module-problem solved! Thanks for the suggestions, anyway. JC1948

Your Answer

Add photo

Related Questions

  • 2003 s-10 wont start 11 answers

    2003 s-10 4.3 turns over wont start . It has obd-2 p0016,p0101,p0128,p0155,p0335. I replaced the fuel pump a filter .I have power to the relay, jump the relay and pump doesn't come on. Grounds are ...

    2003 Chevrolet S-10 3 Dr LS Extended Cab SB

    -

    Maintenance & Repair

  • 1999 Chevy S10 oil pressure drop. 6 answers

    1999 Chevy S10 oil pressure drops to 0 when at a fool stop. Changed the Sending Unit Sensor, Oil, and still same issue. Is this normal?

    1999 Chevrolet S-10 2 Dr LS 4WD Extended Cab SB

    -

    Maintenance & Repair

  • have no fuel pressure on fuel rail of 98 S-10 2.2L 4 answers

    I've changed the fuel pump, fuel pressure regulator, fuel relay, the PCM, crankshaft position sensor. Could the ICM be shutting the injectors down? have fire, just no fuel. tries to start on start...

    Chevrolet S-10

    -

    Maintenance & Repair

  • Can the ignition control module on a 1997 Chevy S-10 be tested on a testor , be passed as OK and still be failing when installed on the engine? 2 answers

    Truck would start, but would not run when throttle was opened. Replaced fuel pump, Pressure regulator,and filter. It started right up, responded to throttle just fine, and I took it out for a test ...

    1997 Chevrolet S-10 2 Dr LS 4WD Extended Cab SB

    -

    Maintenance & Repair

  • my oil pressure gauge drops to 0 while driving 57 answers

    While driving my oil pressure gauge randomly drops down to 0. I have to pull over and shut off my truck for a minute or so and restart it. The gauge goes up a little or some times back to normal. How...

    2003 Chevrolet Silverado 1500 Ext Cab Short Bed 4WD

    -

    Maintenance & Repair

S-10

Looking for a Used S-10 in your area?

CarGurus has 1,398 nationwide S-10 listings starting at $995.

ZIP:

Search Chevrolet S-10 Questions

Chevrolet S-10 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,050
#2 John Saffrahn
John Saffrahn
Reputation 890
#3 Trebor66
Trebor66
Reputation 880
View All

Related Models For Sale

Used Ford Ranger
186 Great Deals out of 6,243 listings starting at $1,595
Used GMC Sonoma
5 Great Deals out of 422 listings starting at $1,995
Used Toyota Tacoma
712 Great Deals out of 32,024 listings starting at $2,995
Used Ford F-150
3,136 Great Deals out of 200,439 listings starting at $1,273
Used Dodge Dakota
131 Great Deals out of 3,874 listings starting at $1,500
Used Chevrolet Blazer
1,216 listings starting at $1,699
Used Nissan Frontier
406 Great Deals out of 21,330 listings starting at $2,200
Used GMC Sierra 1500
1,085 Great Deals out of 56,551 listings starting at $1,600
Used Dodge Ram 1500
484 Great Deals out of 11,746 listings starting at $1,795
Used Chevrolet C/K 1500
932 listings starting at $1,999
Used Chevrolet Camaro
620 Great Deals out of 38,658 listings starting at $2,995
Used Chevrolet Tahoe
997 Great Deals out of 30,889 listings starting at $1,495