EXPO305
Member
When i accelerate it jerks up to about the 40-45 mph range. The check engine light is not on...Any ideas or help will be appreciated
02 Expo jerking HELP!!!!
- Thread starter EXPO305
- Start date
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1997SCEBFEX
Full Access Members
305,
Could be a multitude of things from air cleaner, fuel, MAF, sludgy intake.
Does it ping/detonate?
How many miles on it & since your last service?
Any recent service?
Does it do it all the time; or when hot or cold?
Vacuum leak?
Could be a multitude of things from air cleaner, fuel, MAF, sludgy intake.
Does it ping/detonate?
How many miles on it & since your last service?
Any recent service?
Does it do it all the time; or when hot or cold?
Vacuum leak?
OP
OP
EXPO305
Member
We got the truck in may and it ran perfect...i only had an oil change so far, it doesn't ping or make any noises it just has that hesitation when accelerating. No service lights are on.
1997SCEBFEX
Full Access Members
Sounds like vacuum-related.
Others??
Others??
thebeast1190
Full Access Members
It could be a vacuum leak but it could be something else. Its hard to tell without codes. I would take it to your mechanic.
walnuts4x4
Full Access Members
with jerking under acceleration I would put my bet on a low grade miss coming from one of the COPs (coil on plug)... depending on the severity of the miss sometimes taking the OD off can trick the motor into a different power band and avoid the jerking... otherwise you will have to wait for the CEL to come on since a low grade miss will not trip the light or do a tune up of plugs and coils
Marv02
Active Member
How old is the trans fluid My first Ex did the same I cant remember if the OD light came on or not but something else to take a look at.
Other wise Coil pack but If you get a new cheep set off E-Bay the plugs dont fit as good as OEM but after some fighting with them they do fit.
And I had 1 of the new coil packs that were bad I just had to swap one at a time until I found it.
Other wise Coil pack but If you get a new cheep set off E-Bay the plugs dont fit as good as OEM but after some fighting with them they do fit.
And I had 1 of the new coil packs that were bad I just had to swap one at a time until I found it.
joecrotch
Full Access Members
I would bet the farm on spark! If you have cop's check em. This was the problem mine had when I first bought it and what led me to find this forum 
anyway mine was spark traveling down the boot and plug to the head where it was grounding. get codes read! and if it has a misfire in any cylinder change your plugs!
here is how to check your COP if you have them.
http://www.f150forum.com/f6/how-test-coil-pack-17249/
anyway mine was spark traveling down the boot and plug to the head where it was grounding. get codes read! and if it has a misfire in any cylinder change your plugs!here is how to check your COP if you have them.
http://www.f150forum.com/f6/how-test-coil-pack-17249/
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