studder under a load

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11-04-2008, 06:40 PM

crider4_6

Thread Starter

Join Date: Dec 2007

Location: OK

Posts: 45

studder under a load

car will studder under a load but not under wot and fuel psi is 35 at a idel and 60at wot
and no codes any help ????
just put plugs in and still doing it new fuel filter and still doing it ???

11-04-2008, 06:52 PM

blackstallion666

4th Gear Member

Join Date: Jun 2007

Location: Cumberland County NJ

Posts: 1,369

probably a bad coil. Have its scaned it may have a code pending that hasn't triped the light yet. might tell you what cylinder is the problem

11-04-2008, 07:16 PM

LynnBob Mustang

5th Gear Member

Join Date: Aug 2007

Location: PA

Posts: 2,243

Yep, check your COP's if your a '99 and up. Mine stumbled at 1200-1500 RPM and my COP's at 105K were going bad. I replaced them and it fixed it.

Lynn

11-04-2008, 07:43 PM

99MustangGTman

Join Date: Feb 2007

Posts: 13

Maybe when you installed the plugs you forgot to re-plug the COP connectors?

11-05-2008, 08:04 AM

crider4_6

Thread Starter

Join Date: Dec 2007

Location: OK

Posts: 45

i have grenitelli cop's and it done it b4 i changed the plugs but thanks i will try all of that i have 2 sets of cop's and the grenitelli set and the sct scanner will not read it !!!! i got a buddy at ford i will have it cked