2006 mustang Gt starting issue

[st577]

Joined: 03.24.10
Posts: 6


2006 Mustang Gt, Predator U7140, V.9r04 Univ_Rev
I went from using 87 performance tune to firm shift 93 octane then back.

Now when I start the car it will not idle unless I give it gas on startup. It revs then stalls. I have mod parameters 3.73 gears, K&N fipk, 800 rpm neutral, 800 rpm drive, traction control off.

I had changed the tune to run at Bradenton now need it changed back to daily driving.

car will drive and idle but not at what I have it set at any suggestions?

Thanks Mike

[mikel]

Try the K&N tune...

[st577]

went back to original backup and seems to have corrected itself, will try going back to a different tune in a few days, thanks. Mike

[st577]

well it was short lived, changed back to 87 tune still has start stall issue, went back to stock and get limp mode, tried several tunes all have start stall issue, I had changed the plugs to autolites, and then had start stall issue My guess is I need to look for a vacuum leak.

[st577]

ok I got the original backup working ok car starts and idles, but I have 3.73 gears and if I modify the tune I get the wrench. What could be the problem. Car will not start and idle any longer with the canned tunes. the only change I made was autolite sparkplugs?

[mikel]

sounds like a non tune related issue

[st577]

why would the rpm change in the modify tune not take? how can I remedy this?

[st577]

Problem solved removed and cleaned throttle body had dirt around the butterfly's choking it out, no problem with start and now idles where i program it.....