2000 Chevy S-10 running like a junker

Tiny
GBOD
  • MEMBER
  • 2000 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 120,560 MILES
I have my 2000 S10 know for 9 months I have had the tune up done distributor cap replaced computer swapped map sensor mass sensor plugs wires compression check fuel injection swapped and its all fine. Now in a shop they are saying it might be a fuel rail but I don't have a rail what I got looks like a spider it starts up good but I hit the gas it bogs down and cylinder 4 is missing would the crank sensor have something to do with it or anything else I am lost or could it jump time. I been stuck for a month without my truck.
Wednesday, October 27th, 2010 AT 11:57 AM

20 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
What is the fuel pressure? This is very important on that engine.
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Wednesday, October 27th, 2010 AT 12:25 PM
Tiny
GBOD
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Fuel pressure is at 65 and goes down to 45 pressure is good replaced pressure sensor to
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Wednesday, October 27th, 2010 AT 12:44 PM
Tiny
WRENCHTECH
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What do you mean "goes down to 45"? When?
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Wednesday, October 27th, 2010 AT 12:47 PM
Tiny
GBOD
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65 to start and 45 once its running I doubled check at the time with the haynes Manuel
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Wednesday, October 27th, 2010 AT 12:55 PM
Tiny
WRENCHTECH
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That's your problem. These engines require a MINIMUM of 55 PSI at all times or you will have problems.
They usually won't even run at 45.
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Wednesday, October 27th, 2010 AT 12:57 PM
Tiny
GBOD
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  • 11 POSTS
I have had it dianogised by two diffrent shops and both says the pressure is fine I could be wrong on the whole amount of pressure but will check thanks could there be something else some said if I have a crack in the crank sensor it could be the issue and if it is the pressure is that the pump or what would I replace
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Wednesday, October 27th, 2010 AT 1:05 PM
Tiny
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Hi gbod, Welcome to 2carpros and TY for the donation

Check the fuel pressure and get back with the readings we start here
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Wednesday, October 27th, 2010 AT 1:10 PM
Tiny
WRENCHTECH
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Believe me, a Vortec will not run right at 45 PSI.
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Wednesday, October 27th, 2010 AT 1:24 PM
Tiny
GBOD
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Ok thanks I will let you know ASAP thanks agine
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Wednesday, October 27th, 2010 AT 1:28 PM
Tiny
RASMATAZ
  • MECHANIC
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I'll 2nd that-also at 52-BTDT
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Wednesday, October 27th, 2010 AT 1:38 PM
Tiny
GBOD
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Starts up at 61 and stays at 55 fuel pressure
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Wednesday, October 27th, 2010 AT 3:03 PM
Tiny
RASMATAZ
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Fuel injection swaped-You need to open it up and physically check the fuel pressure regulator and the nut kit

Is this 55psi while its running? If so shutdown and monitor the pressure how long it takes to go zero
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Wednesday, October 27th, 2010 AT 5:30 PM
Tiny
GBOD
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Cylinder 4 is miss fireing but got gas and good spark the hand held comp is saying p0300
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Friday, October 29th, 2010 AT 11:32 AM
Tiny
RASMATAZ
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Random misfires-normally caused by vacuum leaks and bad fuel-checkthe no.4 plug/compression and injector
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Friday, October 29th, 2010 AT 11:38 AM
Tiny
GBOD
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Done everything and number 4 has a miss still pressure is good spark is good change fuel injection no change
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Monday, November 1st, 2010 AT 2:08 PM
Tiny
WRENCHTECH
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You should have an injector balance test done to it. Those injectors do go bad and they can be changed individually.
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Monday, November 1st, 2010 AT 3:32 PM
Tiny
GBOD
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It's a bran new injection its one piece to its the v6 4.3
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Monday, November 1st, 2010 AT 3:43 PM
Tiny
GBOD
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It's the vortec motor I have replace fuel injection I have tested the harness on it I have done all senors be sides nock senor I have took the valve cover off I have check compression and fuel pressure I have done most of everything could the knock senor make just one plug miss or what?
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Monday, November 1st, 2010 AT 3:49 PM
Tiny
WRENCHTECH
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It's not one piece. It has replaceable fuel injector solenoids. This is a sequential injection system.
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Monday, November 1st, 2010 AT 3:50 PM
Tiny
GBOD
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That's not the point I swaped the whole unit and I have fuel
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Monday, November 1st, 2010 AT 3:55 PM

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