under load bucking...

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Nov 7, 2006 | 06:31 AM

gui88ford

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From: Maple Grove, PA

under load bucking...

hey everyone,

i'm noticing a bucking starting to get worse for me.....basically only happens up to around 2,200 RPM's....then clears up....1st through 4th gear....2nd and 3rd being the worst...my truck is a 5 spd also...

i was thinking clutch.....truck has a little over 80K....origional clutch.....

no check engin light either....thats one reason i'm thinking clutch...

thanks for the help...

Nov 7, 2006 | 06:43 AM

projectSHO89

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From: St Louis

Probably plugs/wires.

They dont always set a CEL until the misfire gets severe enough.

Steve

Nov 7, 2006 | 06:57 AM

gui88ford

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From: Maple Grove, PA

mine has COP's...

Nov 7, 2006 | 08:07 AM

valiantski

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it could be one of your coils.

Nov 7, 2006 | 08:57 AM

gui88ford

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From: Maple Grove, PA

how would i go about testing them to find out if one is bad or not????

Nov 7, 2006 | 09:22 AM

VetteTech81

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Quote:

Originally Posted by gui88ford

how would i go about testing them to find out if one is bad or not????

This is where the fun starts.. you can pull them one by one and use a spark tester set the gap large and see if you have consistant spark.. if you find a weak one, replace it and the plug.. there is other ways I am sure.. anyone else have some suggestions? Of course I would want to see if there is any scan data that may help like missfire counters that would cut the chase shorter..
-=Rick

Nov 7, 2006 | 09:30 AM

scottie2hottie

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From: Honkytonkville

most parts stores can test the coil- take em up there and have them test all of em

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Nov 7, 2006 | 10:31 AM

projectSHO89

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From: St Louis

Quote:

Originally Posted by gui88ford

mine has COP's...

Okay, then...you didn't say what year and engine you have....

My answer now is - probably plugs/COP.

A scan tool that reads Mode 6 data will display the MISFIRECNTs for individual cylinders long before any misfire DTCs are set. of course, these scan tools are not at your local auto parts stores. A decent independent shop or a Ford dealer (of course) will have one.

Steve

Last edited by projectSHO89; Nov 7, 2006 at 10:35 AM.