please help ... stumble and bucking...

[streetyme]

Hello well so far to try and rid the stumble and idle issue, I have changed ...
1 TFI module
2 TPS sensor
3 IAC motor
4 cap and rotor
and re timed it.. still to no avail... I am open to any suggestions... one person told me I need to change over to mass air , cause speed density cant compensate for the exhaust changes... I can hear a sligjht miss at idle and If I give it gas wants to buck and sputter till I get into the higer gears. I looked fo a vaccum leak but, could not find any... any suggestions would be great..... I am running 12 degrees BTDC... Just dont know...

 

[Tanus]

definitely change to mass air, even if it doesnt fix problem, it will still be worth the money you spent.

 

[notchback]

i will only assume your talking about the '86 GT and not the

2006 John Demolet (?????)
or
1997 SHO taurus

your gonna hate me but check ur plugs, if they are platinum... throw them away. if they are stock coppers regap them all to .042"

see what happens

 

[streetyme]

sorry forgot about editing my sig the 06 is my mustang gt .... waiting on a sc ... I will defintely check the plugs...

 

[notchback]

oooh... that makes a diff

i got nuthin, and doubting the plugs now

 

[HISSIN50]

Since you noted that it misses at idle, run a cylinder balance test. You do this after pulling codes, so if you haven't pulled codes yet, do it all at once.

Hook up a vac gauge and note the reading. It should be about 20" hg at idle. On a SD car, it needs to be right about there.

An exhaust change alone on a SD car should be fine.

Good luck.

 

[streetyme]

Thanks HISSIN for the advice... I'll try those test this weekend...

 

[SMOKEDYA]

Yeah if i remember right SD cars dont get to bitchy unless you mess with the intake side of the engine! peace













john