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accelerator problem
10-21-2016, 12:45 PM
Post: #1
accelerator problem
I have a 2000 Explorer XLT with a ton of miles on it. Sometimes the accelerator will will not respond right away either on cruise or manually. It will finally catch, and then when it is backed off, it will do the same again. It finally won't respond at all and then the engine will die. If I wait a few minutes and restart, it will run OK. I have taken it to a local mechanic and also a Ford Dealership and neither could find a problem since it only happens sometimes.
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10-21-2016, 10:23 PM (This post was last modified: 10-21-2016 10:27 PM by Rupe.)
Post: #2
RE: accelerator problem
Shooting from the hip (figure of speech) I'd go for the cheap fix first... mostly because you say it's got high miles.

How long since the last FULL tune with changing ALL of the filters... especially the fuel filter?

See, from where we sit it's difficult to "feel" the difference between an ignition issue and a fuel delivery issue, etc.

That said, depending on how many miles it's got you may be looking at a fuel pump (in the tank so not cheap) or possibly a clogged cat converter. Fuel pumps generally last 140k miles, give or take, but you may buy time or help with the diagnosis if a new fuel filter seems to help, even if only a little. A clogged cat may be tough to pin down but they can be intermittent. The first hint of one going bad will be if there seems to be a rattle under the car. You can go around with a rubber hammer and bang on the exhaust system to see for yourself.... OR... have a helper jazz the throttle while you crawl under for a lookie-see where the noise comes from. (if there is a rattle)

If you get to the point where you feel it's a cat problem we can walk you through further diagnosis.

Second hint: A cat issue will probably not show up on a cold engine but does get worse as the exhaust system gets hot.
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10-22-2016, 10:12 AM
Post: #3
RE: accelerator problem
(10-21-2016 10:23 PM)Rupe Wrote:  Shooting from the hip (figure of speech) I'd go for the cheap fix first... mostly because you say it's got high miles.

How long since the last FULL tune with changing ALL of the filters... especially the fuel filter?

See, from where we sit it's difficult to "feel" the difference between an ignition issue and a fuel delivery issue, etc.

That said, depending on how many miles it's got you may be looking at a fuel pump (in the tank so not cheap) or possibly a clogged cat converter. Fuel pumps generally last 140k miles, give or take, but you may buy time or help with the diagnosis if a new fuel filter seems to help, even if only a little. A clogged cat may be tough to pin down but they can be intermittent. The first hint of one going bad will be if there seems to be a rattle under the car. You can go around with a rubber hammer and bang on the exhaust system to see for yourself.... OR... have a helper jazz the throttle while you crawl under for a lookie-see where the noise comes from. (if there is a rattle)

If you get to the point where you feel it's a cat problem we can walk you through further diagnosis.

Second hint: A cat issue will probably not show up on a cold engine but does get worse as the exhaust system gets hot.

Thanks for the help!
I think I failed to mention that this has only occurred so far at highway speeds.
I drove from Ohio to South Carolina and back last week. It ran great all the way down and only acted up on about the last third of the way back. I stopped to get gas at a Wal-Mart and then walked around the store. It ran fine the rest of the way then.
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10-23-2016, 12:41 PM (This post was last modified: 10-23-2016 12:42 PM by Garner.)
Post: #4
RE: accelerator problem
I would suggest having the computer scanned. Scan all systems with a Full Function Scanner, record all code NUMBERS, have the computer cleared, and post the code numbers here for review. My guess is that you will find a "Lean Fuel" code. This would lead back to what Rupe said about changing the Fuel Filter or the Fuel Pump is getting weak. A cheap way to test this theory is to go up a long, steep hill and apply the brakes slightly while trying to keep the speed up. If you trigger your power loss problem it's likely because you aren't getting enough fuel.

Please let us know what you find.

Thanks for using the forum,
Garner

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