98 ford expedition got low rpm and drives sluggish


Asked by Jun 08, 2013 at 06:51 PM about the 1998 Ford Expedition 4 Dr Eddie Bauer 4WD SUV

Question type: Maintenance & Repair

98 expedition got low rpm and drives
sluggish. Can anyone help me I can't figure
this out..

9 Answers


Oh it was cutting out and wouldn't start till I changed the tps and throttle air bypass valve but still got low rpm and sluggish driving..

1 of 1 people found this helpful.

sufficient fuel pressure? by 'cutting out' do you mean the fuel pump stopped working....then began working again? or the intake is so clobbered up with carbon from a defective EGR that it has trouble even running?

2 of 2 people found this helpful.
Best Answer Mark helpful

if it does it more in say overdrive with your foot on pedal Its probly a coil pack!


Plugged Cat? Check Engine light on? Bad gas?, Overheated Transmission? fuel pump? Loose nut behind the wheel? What else is going on with it. Every little detail helps.

2 of 2 people found this helpful.

the fuel pressure regulator has black butyl rubber hoses which are cheap and crack....replace them with silicone vacuum hoses (though more expensive) will last and last and will NOT leak...you see if there is not enough vacuum to the pressure regulator it will not produce ANY fuel pressure and be weak....and the leaking vacuum hose will make you run faster...with no uuumph...because the air/fuel ratio has been upset now....just another keen horror tip of lack of performance from your ole' pal judge_roy~

2 of 2 people found this helpful.

Cats been replaced,no check engine light, Idk bout bad gas, fuel pump good.. never changed egr but gonna try that.. but thanks guys for the tips on thangs that I should check.. thank you again

1 of 1 people found this helpful.

replacing it is gonna be cheaper then messin' around with solvents~


1 of 1 people found this helpful.

My 2003 expedition would go but very slow then its just got more speed and went why

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