2002 Ford E-Series Van Rough acceleration, smooth idle

Tiny
DANIELTB
  • MEMBER
  • 2002 FORD E-SERIES VAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 89,986 MILES
At start-up, the van idles fine, no misses. But as I drive, after a few minutes, the van begins to hesitate and lurch. As I accelerate aggresively(ie. Up a hill) it has a hard time and power is very low. If I stop and put in park, it still idles fine.
I replaced the easy stuff (plugs and wires) but to no avail. Not sure if the O2 sensors need replacing or not.
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Friday, January 9th, 2009 AT 7:46 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi:
Make sure the catylatic converter isn't in the process of plugging. Listen for hissing from exhaust or other sounds. Also, it the check engine light on? Have you had the computer scanned?
Also check for vacuum leaks.
Joe
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Saturday, January 10th, 2009 AT 2:38 PM
Tiny
DANIELTB
  • MEMBER
Yeah the check engine light is on. And as it starts to stumble through accelerating, the check engine light flashes for a bit then goes solid again.
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Sunday, January 11th, 2009 AT 1:13 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Here is what I suggest, most nationally recognized parts stores will scan the computer for free. Take your van to one and have them check that for you. It will identify where the problem is coming from.

Let me know what you find.

Joe
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Sunday, January 11th, 2009 AT 1:15 PM
Tiny
DANIELTB
  • MEMBER
Just for giggles I'm going to clean the mass airflow sensor off. I've been reading that a dirty one can affect poor mileage as well as cause these symptoms which I have noticed a loss of about 25-30 miles off per quarter of a tank. It's been a gradual loss of mileage up until now with the poor performance just coming up recently.
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Sunday, January 11th, 2009 AT 6:33 PM

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