Sputtering and bucking between 12 and 1400 rpm's on steady throttle

[DogVomit]

Is it my MAF?

It's making my ride a bad experience... but when I get on it a bit... It's love again... love being blown... no other way to go.

Unfortunately, running at 50 mph is required... that really sucks and my stang jerks like a pile of sheet!

Any ideas?

 

[Mike97gt]

i would start with replacing your plugs. many many times i have had 4.6's and 5.4's with this problem come into my work. i always start with new plugs and 99 percent of the time thats the problem.

 

[DogVomit]

i would start with replacing your plugs. many many times i have had 4.6's and 5.4's with this problem come into my work. i always start with new plugs and 99 percent of the time thats the problem.

Thanks but I changed my plugs about 3k ago to NGK's since I threw in the centri.

As a side note, it did it before I had the the Vortech install done.

 

[Mike97gt]

ok that rules out the most common. i would look at your tune then.

 

[exindust]

Tune or..

Fuel pump, fuel filter.

 

[the98stang]

+1

check the A/F ratio.

 

[jstreet0204]

If it was doing it before the SC install, that more than likely eliminates the tune as well. Have you checked your EGR? Mine caused some part throttle bucking. Try temporarily blocking it off with some gasket material and see if the problem goes away. If it does, you need to either replace the egr, or do away with it. Getting rid of it will require a modification to your tune to turn off the check engine light though.

 

[RAT]

I've heard a few things can cause this. EGR like mentioned above, carbon tracking on your plugs caused by the gap being to large, and the COPs having problems.
Here is a thread that has a lot of links and info on the coils and wires and problems cured by replacing the wires/connectors.

http://www.mach1mustang.org/vbulletin/showthread.php?t=7120&page=1&pp=15

 

[Mike97gt]

If it was doing it before the SC install, that more than likely eliminates the tune as well..

GOOD point i missed that he said it did it before the s/c install. i have seen some mod v-8 have egr problems that have caused misfires.

+ 1 on checking the egr system.