sputtering and misssing

[blk92]

it will run fine for a min then i will stop at a light and it will miss and sputter at part throttle if i floor it it will clear up.
i have replaced the pcv valve, spark plugs, wires, cap and rotor,checked timming, fuel pump, fuel pressure reg. cannot fique out the problemshould i change the 02 sensors they have 115000miles on them or will a custom burned chio from murrillo motorsports clear it up

 

[racerraj]

Bump, I'd like an answer too.

 

[noslow5_0]

it could be a bunch of things.... timing, vacuum leak, running lean... do you have an afpr??? if so, try to richen it up some... run the codes, to see whats going on...

 

[noslow5_0]

oh and have you set or messed with the throttle stop screw or tps??? also how old is you IAC???

 

[blk92]

the iac has never been replaced when i unplug it it runs a little better

 

[jrichker]

Dump the codes and see what the computer says is wrong…

Here's the link to dump the computer codes with only a jumper wire or paper clip and the check engine light, or test light or voltmeter. I’ve used it for years, and it works great.

See http://www.troublecodes.net/Ford/
OR
See http://www.dalidesign.com/hbook/eectest.html for more descriptive help
OR
See http://www.mustangworks.com/articles/electronics/eec-iv_codes.html