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Ford Repair/89 ford ranger

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Expert: Dennis W - 10/14/2007


Question
the fuel pump pressure on my ranger W/2.9 engine only reads up to 20 lbs. with ign.on/ engine off, with engine running it will read 35 lbs.at idle. it is hard starting when cold.should i replace the fuel pump?   thanks. Tom.

Answer
Spec on this Ranger is 35-45 running, normally the pressure will be slightly higher with KOEO. If you can check the fuel flow (volume) this might help figure it out. Sounds like you have a fuel pressure gauge, if it has a valve to bleed off the pressure, depress this valve with the engine running, if the idle slows or dies, then the fuel volume is low and this could be a pump, or clogged filter. Fords can clog a fuel filter within 15-20K miles, so if you have not replaced it for a while it is a cheap thing to do to recheck your problem.

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Dennis W

Expertise

I am a retired Ford master tech specializing in electrical, climate control, emissions, driveability, chassis, brakes, and any light repairs. Currently employed by an independent shop that appreciates my knowledge and abilities. Cannot answer transmission or parts questions, these are not areas of my expertise.

Experience

37 years of auto repair, diagnosis, and emissions testing, in service staions, independent garages, and 20 years with Ford dealers.

Organizations
National Street Rod Association (NSRA)
International Automotive Technicians Network (IATN)
IAMAW (retired)
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Education/Credentials
Riverside City College Automotive technology program
Ford Master Tech Certified Engine and Chassis Master (Over 500 hours)
ASE Certified in 7 categories
6 years training in Union 76 Pro-tech program

Awards and Honors
4-time Technician of the Year at Almaden Lincoln Mercury
Ford Master Tech
Union 76 Pro-tech Master tech

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