please help, huge problem

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03-31-2009, 09:18 PM

HO5.0FOX5.0HO

Thread Starter

Join Date: Mar 2009

Location: Arkansas

Posts: 10

please help, huge problem

ok, we went through and cleaned all the injectors, checked all grounds, new mass airflow sensor, throttle position sensor, air charge sensor, temp. sensor, antifreeze, has no EGR, aftermarket headers, replaced all intake gaskets, polonium gaskets, getting right current off all sensors off sensor part, and PCM, IAC is bad, only misses when it gets hot. this is a 5.0HO 95 mercury cougar motor put into a 93 mustang LX convertable

PLEASE HELP been stuck on this BS for forever now

03-31-2009, 09:38 PM

gt884me

2nd Gear Member

Join Date: Feb 2006

Location: Iowa

Posts: 474

Did you say your IAC is bad?Check that ...Or could be your tfi module

03-31-2009, 09:48 PM

HO5.0FOX5.0HO

Thread Starter

Join Date: Mar 2009

Location: Arkansas

Posts: 10

wait.. whats a tfi, im old and not good with the whole abbreviation thing

03-31-2009, 09:50 PM

mustangsneverdie

5th Gear Member

Join Date: Oct 2007

Location: Georgia

Posts: 2,624

do a koeo/koer test on it to see what codes show up

04-01-2009, 08:56 AM

projectresto83

M.A.D. Motorsports

Join Date: Jul 2006

Location: Indiana

Posts: 8,014

The tfi module is the grey thing mounted on the front of the distributor. Common problem with them is missing or complelty dieing when they get hot. This is the reason why it was relocated to the fenderwell in 94.