Fuel cutting out under load

Tiny
WESWALKER88
  • MEMBER
  • 1995 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 179,985 MILES
Truck will not go over thirty mph. The fuel cuts out and starts to sputter at 2000 rpm all the way to 3000 rpm. I have changed plugs, MAP, TPS, IAT, crank sensors, wires, cool pack, cool mod, fuel pressure, fuel pump, crank, timing gears and chain ECM/ECU. Checked grounds, injectors, head gasket. I check compression it is 180 across the board.
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Thursday, January 12th, 2017 AT 9:18 PM

27 Replies

Tiny
HMAC300
  • EXPERT
Scan for codes a nd check fuel pressure with a gauge. Then check for a vacuum leak pump pressure should be 41-47 psi.
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-1
Friday, January 13th, 2017 AT 7:12 AM
Tiny
LOU P
  • MEMBER
I did not see where you had mentioned a fuel filter, you will want to do a fuel quantity test with the key on. Should be one liter in thirty seconds if I remember correctly. Lou
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Friday, January 13th, 2017 AT 7:20 AM
Tiny
WESWALKER88
  • MEMBER
Cannot, fuel Schrader valve on this truck and does not codes stored check engine light will not even come on.
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Friday, January 13th, 2017 AT 7:20 AM
Tiny
WESWALKER88
  • MEMBER
Everything was good filter. It was the first thing, sorry.
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Friday, January 13th, 2017 AT 7:21 AM
Tiny
LOU P
  • MEMBER
Okay, if memory serves me you need to remove the fuel filter and install a T with a fuel gauge attached. Also, does the truck run bad only under load? Do you have a fuel injection service tool?
If so you may want to disable the fuel system and run the truck off the fuel service system. If it runs the same you know its not a fuel system issue. If it runs better then you know it is something with the fuel system.
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Friday, January 13th, 2017 AT 7:35 AM
Tiny
WESWALKER88
  • MEMBER
It runs the same I have already tried it.
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Friday, January 13th, 2017 AT 7:38 AM
Tiny
LOU P
  • MEMBER
Okay, well if you do not tell us what you have already done then how are we supposed to guide you in the right direction. :)
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Friday, January 13th, 2017 AT 7:44 AM
Tiny
LOU P
  • MEMBER
Partially disconnect the exhaust from the manifold see if the engine runs better. You could have a partially clogged catalytic converter.
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Friday, January 13th, 2017 AT 7:45 AM
Tiny
WESWALKER88
  • MEMBER
I have done so much I have forgotten.
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Friday, January 13th, 2017 AT 7:45 AM
Tiny
WESWALKER88
  • MEMBER
Okay, just got back from trying that no differences.
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Friday, January 13th, 2017 AT 7:50 AM
Tiny
LOU P
  • MEMBER
Forgiven :)
so either remove the o2 sensor and install a back pressure gauge or partially disconnect the exhaust and see if it runs better. You should never have more then 1-2 psi back pressure. Pretty sure its under one psi.
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Friday, January 13th, 2017 AT 7:51 AM
Tiny
LOU P
  • MEMBER
Okay, well if you ruled out exhaust and fue. I would take a closer look at the distributor and check the play of the shaft the rotor sits on. Also, the condition of the pick up coil. Not sure if I seen that you replaced that or not, but it sounds like you may have ignition breakdown. I would take a closer look at the distributor. Lou
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Friday, January 13th, 2017 AT 7:57 AM
Tiny
WESWALKER88
  • MEMBER
No distributor has two coil packs and in two and a coil module.
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Friday, January 13th, 2017 AT 8:00 AM
Tiny
WESWALKER88
  • MEMBER
And I have replaced both.
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Friday, January 13th, 2017 AT 8:02 AM
Tiny
LOU P
  • MEMBER
Oh sorry, thought this was a distributor style still. If I can come up with some better information I will reply back. I am sure another tech here has run across this and should chime in. Lou
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+1
Friday, January 13th, 2017 AT 8:14 AM
Tiny
WESWALKER88
  • MEMBER
Thank you.
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Friday, January 13th, 2017 AT 8:16 AM
Tiny
LOU P
  • MEMBER
Does it matter if the engine is hot or cold? Does it run differently?
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Friday, January 13th, 2017 AT 8:29 AM
Tiny
WESWALKER88
  • MEMBER
No it does not. I order a temperature sensor I just read that could cause this problem with Chevrolet's.
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Friday, January 13th, 2017 AT 8:31 AM
Tiny
WESWALKER88
  • MEMBER
Hot or cold runs the same.
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Friday, January 13th, 2017 AT 8:40 AM
Tiny
LOU P
  • MEMBER
This is a good one. Have you verified battery voltage at low and high rpm and at the engine control unit?
I think you said you did the timing. Do you have a scan tool that can read live data while the engine is running?
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Friday, January 13th, 2017 AT 8:57 AM

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