misfires

[pimpplaya32001]

i have a 1999 gt. when i crack the throttle past 25% the car starts missing on one or multiple cylinders. sometimes it does this alot other times it doesnt do this at all. temp, type of fuel and rpm range all seem to play a part in this mess. if anybody has any ideas or a fix please let me know.

 

[Chris2kGT]

i have a 1999 gt. when i crack the throttle past 25% the car starts missing on one or multiple cylinders. sometimes it does this alot other times it doesnt do this at all. temp, type of fuel and rpm range all seem to play a part in this mess. if anybody has any ideas or a fix please let me know.

Are you throwing any codes? Lets start there.

 

[pimpplaya32001]

no codes at all

 

[Chris2kGT]

Do you drive your car in all weather? If so did you make sure that when you swapped your intake that you made sure your COPs seated flush to the heads? I only ask because my car was sputtering horribly when I had water built up in a few of the wells.

 

[SubZero00GT]

Check your plugs.. If plugs are okay check coil packs.

 

[offroadrich]

Id check Plugs and wires first.

 

[02minrlgrygt]

i had like the same thing happen , it was a bad ignition coil which are known to go bad on mustangs

 

[RedFireCobra]

muffler bearings. check those

 

[Norwood]

muffler bearings. check those

Yeah i heard they can cause alot of engine problems...:nono:

 

[xxkazp3rxx]

I would check your plugs... typically when you get misfires it starts there... Could also be a dirty MAF meter... That has caused me to misfire in the past.

 

[scotts99snake]

I would start by changing your plugs. They are cheap.

 

[italianaqtpie]

Did you ever solve the problem?