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1999 Ford Ranger idle and acceleration

Tiny
ROBIN BIGGIE
  • MEMBER
  • 1999 FORD RANGER
Engine Performance problem
1999 Ford Ranger 4 cyl Two Wheel Drive Manual 153.00 miles

I have changed what the computer codes have said.
2 Oxygen sensors EGR pressure switch, EGR vacuum switch, checked for vacuum hose leaks, replaced 2 year old spark plug wires with new ones,
Mass air flow sensor, was not on code but I changed it any way. My spark plugs are only 1 yr old and they are top of the line Bosch.
Last Saturday I replaced the valve cover gasket and I was extremely careful not to get any thing in the motor and this fixed my oil leaks.
acceleration is sputtering and idling is rough power is not their.
I take very good care of my truck so I am at a loss for what it could be
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Thursday, June 24th, 2010 AT 5:16 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1. Defective spark plug
2. Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4. False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Idle air control valve.
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Thursday, June 24th, 2010 AT 6:10 PM

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