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Anonymous Posted on Mar 26, 2012

Chevy s10 wont start

My truck will crank but not start. Has 45 psi at key-on and can hear fuel pump. This is on a 99 s-10 truck with the 2.2. Any suggestions?

1 Answer

Joe Taylor

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  • Chevrolet Master 2,229 Answers
  • Posted on Mar 27, 2012
Joe Taylor
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Just a thought, it could be the antitheft system "passlock" this can turn your injectors off if not functioning correctly. (that's the antitheft, can't run with no injectors). You would see a light on the dash that says SECURITY or ANTITHEFT. This link explains.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

5 Related Answers

Anonymous

  • 491 Answers
  • Posted on Dec 29, 2008

SOURCE: 1995 Chevy Silverado cranks normal but won't start

could be the fuel pump or the filter could be clogged. prolly cost between $400 and $800 to fix depending on the shop and their prices so its hard to say how much. again this is just a guess

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Anonymous

  • 239 Answers
  • Posted on Dec 31, 2008

SOURCE: 86 Chevy wont start

check for spark by removing a sparkplug

Anonymous

  • 366 Answers
  • Posted on Mar 18, 2009

SOURCE: chevy s10 pickup fuel pump does not work

check for blown fuse,defect. pump relay,if ok, check power at sending unit connector,if power is there ,pull pump from tank inspect connections going to pump,if ok,replace pump,if no power at send.unit conn.probe elect.circuit,for open circuit damage.

Anonymous

  • 3 Answers
  • Posted on Apr 19, 2009

SOURCE: new fuel pump replaced on 2000 chevy s-10 blazer, no fuel

BAD FUEL PUMP


Anonymous

  • 1382 Answers
  • Posted on Mar 21, 2010

SOURCE: 2001 expedition cranks but wont start

If the engine cranks over normally when you attempt to start you car, but the engine does not start, the problem may be NO FUEL, NO SPARK or NO COMPRESSION. The engine needs adequate fuel pressure, a properly timed spark and normal compression to start.

1) To find why the engine won't start, remove the air inlet tube from the throttle body, push the throttle open and spray a small amount of aerosol starting fluid into the engine. Crank the engine. If it has spark and compression but NO FUEL, it will start and run a few seconds before dying. If it does NOT start, it probably has NO SPARK.

2)Another method to check for spark is to pull a spark plug wire off of a spark plug (if it has plug wires, coil-on-plug ignitions do not) and place the open end of the plug wire near a metal surface on the engine. Have a helper crank the engine while you watch for a spark. DO NOT hold the wire while doing this as it can shock you. If you see a spark, the problem is not spark, but most likely NO FUEL or NO COMPRESSION. If you do not see a spark, the problem is in the IGNITION CIRCUIT.

3)Proper fuel pressure is critical for fuel injected engines to start and run. You should hear the fuel pump inside the fuel tank buzz for a couple of seconds when the ignition is turned on (no buzz means the pump is not running and the engine is not getting fuel). You can smell the tailpipe for gasoline vapors after cranking the engine. If you smell gas, the problem is likely not fuel but NO SPARK. You can also remove the plastic cap and press the schraeder valve test fitting on the fuel rail to see if there is any fuel pressure to the engine (not a very accurate test because fuel pressure must be at a certain level for the engine to start, for that you need a gauge). Even so, no fuel at the fuel rail would tell you fuel is not getting to the engine..

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1999 Chevy S10 2.2. Occasionally my truck will crank but won't start. After waiting 10 mins it will start just fine. What causes this?

sounds like your fuel pump is going out. Next time it happens remove fuel cap and have someone turn ignition to the on position not crank. You should hear the fuel pump run for 2-4 second. If you don't hear it come on then try beating your gas tank hard with a rubber mallet while Ignition is in on position.listen for fuel pump to come on. If it starts after this then fuel pump it ?s.
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Just because it pumps gas doesn't mean it is at the exact pressure it should be? Most fuel pumps have a psi of 40 to 45 psi, your fuel pump could be pumping at 25 psi or less which is not enough to start your car even though you can see some fuel pumping out. A simple tool to check fuel pressure can be bought at any auto parts store, check the specs on the fuel pump for your 02 Chevy first to see at what pressure it works, then use the fuel pressure gauge to check it. Anything less than what the specs on your fuel pump are suppose to be and you have a bad fuel pump?

Let's say your fuel pump works at 43psi, you hook up the fuel pressure gauge and you find that it reads 25 to 30 psi, that means it's not enough fuel pressure to start your engine.
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Make sure battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
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