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CPS or Fuel Pump Problem?

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Old 05-25-2009, 07:19 AM
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Default CPS or Fuel Pump Problem?

I have a 1997 Jeep Cherokee with 298K and was still going strong until yesterday afternoon. I need help solving a problem. I was driving when my Jeep suddenly died, then started again, then died. I had to pull over for a minute, it started again...drove for several miles, then it shuddered and died. After a few seconds, it started, drove, then died. After an hour waiting for a tow, it started , dove 2 miles, then died. The tow came and took us home. Any ideas what the problem IS or could be? I may have a few. Help needed before throwing away several hundred $$ by unnecessarily going to "the local garage". Thanks in advance!

Dejan

Last edited by dejan; 05-25-2009 at 07:39 AM.
Old 05-25-2009, 07:29 AM
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If you tested your Jeep, you wouldn't be "throwing away" any money.

You can buy a fuel pressure gauge at Harbor Freight for $10. While you are there, buy a test-light for $5. These two tools will diagnose 90% of your Jeep.

Test fuel pressure at the test-port on the fuel rail.

Test for spark... pull the coil wire off and spin the engine.

No spark??? The green/orange wire should have battery voltage from the ASD relay while cranking. Have voltage???

Connect the test light clamp to the (+) terminal and check the other wire on the coil... it should "pulse" ground while the engine is cranking.

Check this stuff and call me back.
Old 05-26-2009, 10:49 PM
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try tps throttle position sensor
Old 05-30-2009, 05:19 PM
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Turned out to be the CPS
Old 05-31-2009, 01:52 AM
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cps cam shaft pasision sensor?
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