Fuel Pump

Tiny
JAYSON.WAGNER
  • MEMBER
  • 2002 ISUZU RODEO
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I tested the fuel pressure using a test kit. Registered at 40psi, stepped on the gas then the pressure dropped to 33psi. I changed the fuel filter.

Recommendations on replacement brand/type, etc?
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Tuesday, February 22nd, 2011 AT 8:56 PM

6 Replies

Tiny
WRENCHTECH
  • EXPERT
The pressure spec for this engine is 41 to 55PSI and should NEVER go below that. The pressure should actually increase when accelerating. It appears you have a bad fuel pump.
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Tuesday, February 22nd, 2011 AT 10:32 PM
Tiny
JAYSON.WAGNER
  • MEMBER
Wrenchtech,

Thanks for the reply!

I took the advice and replaced the fuel pump. Then tested the fuel pressure again. Registered at 42psi and increased to 48psi when I stepped on the gas. Thought the problem was fixed but took it for a test drive around the block and the vehicle has the same issues. Top speed of 10mpg, stuttering, bogs down when I step on the gas, check engine light on, then she died on me. I sat there for a few mins and then it started again. It's feels like it's a fuel line/pressure issue but could it be something else? Any advice with this is greatly appreciated!
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Thursday, February 24th, 2011 AT 2:14 PM
Tiny
WRENCHTECH
  • EXPERT
What is the code number being stored from the check engine light?
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Thursday, February 24th, 2011 AT 2:15 PM
Tiny
JAYSON.WAGNER
  • MEMBER
I have a scanner coming tomorrow and I let you know. I need a day off from this. Thanks wrenchtech.
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Thursday, February 24th, 2011 AT 2:26 PM
Tiny
JAYSON.WAGNER
  • MEMBER
Wrenchtech. The code came up as "#2 cylinder misfire" and I knew that wasn't the issue so I ended up bringing it in for a professional diagnostic test. Catolytic converter was the issue. She runs like a dream now. Thanks for assisting and i'll recommend this site to anyone with vehicle issues and is a "do it yourself".
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Tuesday, March 1st, 2011 AT 8:26 PM
Tiny
WRENCHTECH
  • EXPERT
Glad to hear you got it resolved.
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Tuesday, March 1st, 2011 AT 8:28 PM

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