# why is this running to rich? **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [April 20, 2008, 11:56am UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120 "2008-04-20T11:56:21Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![86maro](https://avatars.discourse-cdn.com/v4/letter/8/2acd7d/32.png) [@86maro](https://forums.speedlife.net/u/86maro)\ **Post date:** [April 20, 2008, 11:56am UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/1 "2008-04-20T11:56:21Z")
Ok so i have a 87 mustang with m.a.f conversion, the ex owner said he got diffrent injectors ,the cars running really really rich. does anyone know why? could it be something not hooked up right from the m.a.f? or the injectors? ---
**Author:** ![nelstoys](https://avatars.discourse-cdn.com/v4/letter/n/48db29/32.png) [@nelstoys](https://forums.speedlife.net/u/nelstoys)\ **Post date:** [April 20, 2008, 11:58am UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/2 "2008-04-20T11:58:42Z")
You need an adj. fuel reg. ---
**Author:** ![IROC-Z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/iroc-z/32/7389_2.png) [@IROC-Z](https://forums.speedlife.net/u/IROC-Z)\ **Post date:** [April 20, 2008, 12:01pm UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/3 "2008-04-20T12:01:40Z")
What size injectors did he put in? If they’re bigger than stock you probably need a tune or low your FP a bit. ---
**Author:** ![Nikuk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nikuk/32/7254_2.png) [@Nikuk](https://forums.speedlife.net/u/Nikuk)\ **Post date:** [April 20, 2008, 12:10pm UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/4 "2008-04-20T12:10:42Z")
Your MAF needs to be calibrated to your injector size. Do you know the part number for the MAF, and what color are the tops of the injectors? > [@nelstoys](#): > > You need an adj. fuel reg. It has nothing to do with the AFPR, unless you installed one & have it cranked up. ---
**Author:** ![nelstoys](https://avatars.discourse-cdn.com/v4/letter/n/48db29/32.png) [@nelstoys](https://forums.speedlife.net/u/nelstoys)\ **Post date:** [April 20, 2008, 1:21pm UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/5 "2008-04-20T13:21:15Z")
U cant just put bigger injecotrs without the map calabrated. Also a fuel reg. will be a good thing. Mustangs are anal.:thankyou: ---
**Author:** ![Nikuk](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/nikuk/32/7254_2.png) [@Nikuk](https://forums.speedlife.net/u/Nikuk)\ **Post date:** [April 20, 2008, 1:58pm UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/6 "2008-04-20T13:58:45Z")
> [@nelstoys](#): > > U cant just put bigger injecotrs without the map calabrated. Also a fuel reg. will be a good thing. Mustangs are anal.:thankyou: if by map, you mean MAF, then yes. That is what exactly what was posted just above yours. :roll: Of all the mustangs that I’ve had, there has never been a NEED for an AFPR… and they all ran just fine. :thankyou: ---
**Author:** ![86maro](https://avatars.discourse-cdn.com/v4/letter/8/2acd7d/32.png) [@86maro](https://forums.speedlife.net/u/86maro)\ **Post date:** [April 20, 2008, 3:30pm UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/7 "2008-04-20T15:30:05Z")
the color of the injectors are like yellowish orange. if i get a regulator and set that up i should be fine? ---
**Author:** ![BDR5oh](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bdr5oh/32/7315_2.png) [@BDR5oh](https://forums.speedlife.net/u/BDR5oh)\ **Post date:** [April 20, 2008, 4:04pm UTC](https://forums.speedlife.net/t/why-is-this-running-to-rich/47120/8 "2008-04-20T16:04:22Z")
you dont need an AFPR … is your car mass air … if soo … what meter … are your O2’s plugged in … soo many variables