Question about 1998 Ford Expedition

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Starts,idles, and revs fine, but hardly goes on the road, like a huge power loss! new plugs, wires, coils, and fuel pump.

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Hi,
May be related to a plugged catalytic converter in the exhaust system. You'll need to take it to a muffler shop to get fixed. You do NOT need a 'factory/original manufacture catalytic converter'. A universal one (much cheaper is fine).
Td

Posted on Nov 06, 2012

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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daves944
  • 1050 Answers

SOURCE: P0302 CODE

Probably has a plugged catalytic converter from the misfire that was on cylinder #2, which was indicated by the code. If you wanted to confirm the plugged cat, you could remove the precat O2 sensor and drive it. It will be noisy, but if you get an increase in power, you know you have a restriction

Posted on Apr 12, 2009

carsandcomps
  • 722 Answers

SOURCE: fuel pump relay losses power to yellow wire

If you wired it yourself, note: yellow is a source wire in most wiring systems - red - direct power (battery/fuse box) - yellow, relay switch to part/component (i.e. fuel pump{electric}); then ground.
Ground, if self-wired, can be grounded to the frame,body, any metal.

If the wiring is not the issue, replace the fuel pump relay, if haven't already. If this is not the problem, or has been replaced already, you may need to replace the fuel pump. NOTE: If this is the Ford e F250,350 etc. it may have a secondary fuel pump which would be located on the driver side mounted to the frame just behind the engine. I owned a 90 F250, 2WD, and no such part was installed. At least not there.

I had a similar issue with my truck, would start, sometimes run for a while and die, would drive, then randomly die while driving -

Check the fusable link next to the battery and ensure it is securely locked together - it is a twist and pull mechanism (plastic). This was the issue with mine. I tore the front of my engine apart thinking it was a timing issue, just to find out 4-5 times of doing that, that it was the fusable link - i too, replaced the fuel pump relay, fuse etc. -- check this first as it may be the cause (if carburated, also check all your plugs, wires, cap and rotor - if not carburated, have the coil packs tested - NOTE: the modular (coil packs sit/bolt to this) cannot be tested - look for bubbles, or sign of "boiled" sections. If such marking exist, it needs replaced. Have the coil packs tested anyway just to be sure. If they all test positive, your good to go - if not, replace as need - (also be suire to mark each one in the order they come off ) this doesn't really make any difference when you put it back together, however, this will let you know, in the event the modular is good, (no boils or bubbles etc) ; you will be able to determine which side (if three, left,middle,right) was the bad coil pack. Mark each, from left to right, as 1,2,3, or A,B,C - or however you deem suitable. This will be useful for reference in possible future occurrances.

I hope this information is helpful and you get your vehicle running smoothly. I understand your frustration with this particular issue, as it took me 2-3 months before I realized that the fusable link was the issue - had spent 3-4 hundred dollars in parts ---

Please let me know if I can be of any further assistance. Thank you,

carsandcomps
Guru, fixya.com

Posted on May 13, 2009

  • 14036 Answers

SOURCE: loss of power on acceleration. engine bucking.

check transmission fluid.change fuel filter and air filter.try changing up on where you buy gas .because bad gas causes problems.

Posted on Jun 26, 2009

  • 64 Answers

SOURCE: 1989 ford f150 loss of power

1989 is fuel injected, on the intake there is idle air control valve, make sure this is not dirty, also you may want to check the coolant temperature sensor, if the engine thinks it is warmer then waht it is the fuel air ratio will be off and your truck will run bad.

Posted on Jul 22, 2009

  • 52 Answers

SOURCE: 2001 focus. Replaced plugs, wires and coil pack.

Have you replaced the timing belt? if not i would highly recommend doing so. these cars need to have the timing belt replaced before it breaks otherwise it can and will cause major engine damage.

Posted on Aug 11, 2009

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