Lack off acceleration

190

Asked by Sep 17, 2016 at 05:46 PM about the 2001 Ford Expedition XLT

Question type: Maintenance & Repair

I'm having problems with my expedition not
accelerating. I haved changed many parts like spark
plugs, coils, MAS sensor, IAT sensor, fuel filter, air
filter and had a computer diagnostic done. And still
the same. I need help

17 Answers

19,085

Bad crank shaft sensor will make it do that, check it or replace it, it's located on lower front passenger side bolted to timing chain cover next to ur ac compressor

12 people found this helpful.
Best Answer Mark helpful
190

I have checked the crankshaft sensor and when I removed it, it had oil and dirt. It's that normal?

6 people found this helpful.
19,085

Oil is, too muck gunk is a sign of lack of oil changes

4 people found this helpful.
190

Thank you very much

2 people found this helpful.
190

Irodri911 is the crankshaft makes my expedition lack of horse power after being running for 15 - 20 minutes.?

8 people found this helpful.
19,085

Well, there's many things than can cause it, one is the crankshaft positioning sensor, and the others that u mentioned also vacuum leaks or a dirty throttle body

4 people found this helpful.
190

The vehicle has no vacuum leaks and everything else are clean. Do you think it might be the fuel pump.

3 people found this helpful.
19,085

Check fuel pressure to see if it's ok. When was the last time u replaced fuel filter, if u haven't, u may want to do it as a routime maintenance anyway

4 people found this helpful.
19,085

Check fuel pressure to see if it's ok. When was the last time u replaced fuel filter, if u haven't, u may want to do it as a routime maintenance anyway. Filter is located under truck by driver's side, u'll need special tool to release hoses from filter, just ask for it at ur local auto parts store

4 people found this helpful.
70

I need help I just got a truck 98 expedition when I start it ,it runs roughly and when I touch the gas while in park it sounds like it ain't running but when I let off the gas it is any reason why this is happening?

7 people found this helpful.
60

Okay so I replaced the fuel pump spark plugs and coils also replace the fuel filter the truck seems like it doesn't want to have to get up and go when it starts off in the morning when I go to drive in traffic check the air flow system PCV valves it also has a problem wanting to kick over still after replacing all this any suggestions please single mom trying to do it all on her own

2 people found this helpful.
60

I also noticed that when driving it after 20 miles per hour it kicks in better but the RPMs also go high but going from start till 20 miles it shakes and it doesn't want to have any get-up-and-go

4 people found this helpful.

I have changed out my starter,starter ,solenoid,spark plugs ,wires,coil packstill can't figure out why my 99 Ford expedition is losing power when hitting the gas

10

Paros

1 people found this helpful.

To guruLTKTX, try your intake manifold gaskets. Notorious for going out. Easy job. Most people just live with it when you don’t have to. Another is a monster. OIL PUMP. Root of most all problems below intake.

These engines especially the 3v are ahead of their time. I love them. After you know what to look for, you quit throwing parts at them. Well maintained, hands down some of the best engines I’ve owned. There’s some upkeep. But, for what you get, well worth it. Just a little FYI, you know the 5.4 liter expedition is only rated less than 200lbs difference in towing capacity as the 2500 suburban. Look it up.

I changed all of the above and still had acceleration issues. Very costly. So I spent 50 dollars and changed the crankshaft position sensor my self and BAM! Hello acceleration!!!

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