stalls when i brake real hard

mrkmarine89 · October 27th, 2009, 08:50 PM

I just installed stage 2 comp cams and valve springs and it runs great until it comes to braking, if im going 55 mph and have to stop at a light i can either engine break it till first gear then put it in neutral and pump the gas, or if i use pure brakes the engine doesnt seem to find its idle and drops off and stalls, any suggestions would be great

black89GT · October 27th, 2009, 08:54 PM

But if you start her up and let it run it idles fine?

mrkmarine89 · October 27th, 2009, 08:55 PM

yea idles just fine drives just fine

mrkmarine89 · October 27th, 2009, 08:56 PM

i even bumped the idle up to see if that would help.. still stalled on hard braking

TheUNZippee! · October 27th, 2009, 08:58 PM

Sounds like you have a vacuum issue.

black89GT · October 27th, 2009, 09:01 PM

+1 I don't know much about those cars, but what about the IAC?

Trick Tuners · October 28th, 2009, 12:56 PM

Did you get tuned for the cams? This is a fairly typical issue for no tune.

October 27th, 2009, 08:50 PM	#1
mrkmarine89 Newbie 2003 Mustang GT Join Date: Oct 2009 Posts: 3	stalls when i brake real hard I just installed stage 2 comp cams and valve springs and it runs great until it comes to braking, if im going 55 mph and have to stop at a light i can either engine break it till first gear then put it in neutral and pump the gas, or if i use pure brakes the engine doesnt seem to find its idle and drops off and stalls, any suggestions would be great

October 27th, 2009, 08:54 PM	#2
black89GT Enthusiast 89 gt Hatch How fast can zippie go down? Join Date: Jun 2009 Location: CLEVELAND OHIO Posts: 783	But if you start her up and let it run it idles fine? __________________ Lakewood Uca's/lca's. FMS clutch w/Adj. , Hurst shorty, aluminum d.s. 3.73's Black Stang Crew Co-Founder The blood i bleed is black indeed

October 27th, 2009, 09:01 PM	#6
black89GT Enthusiast 89 gt Hatch How fast can zippie go down? Join Date: Jun 2009 Location: CLEVELAND OHIO Posts: 783	+1 I don't know much about those cars, but what about the IAC? __________________ Lakewood Uca's/lca's. FMS clutch w/Adj. , Hurst shorty, aluminum d.s. 3.73's Black Stang Crew Co-Founder The blood i bleed is black indeed

October 28th, 2009, 12:56 PM	#7
Trick Tuners Hardcore Enthusiast KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 2,436	Did you get tuned for the cams? This is a fairly typical issue for no tune. __________________ SCT Tuning, JLT intakes, Aeroforce OBDII gauges and PLX wideband products @ Trick Tuners My forums Xcal3 SF with preloaded tunes and free custom tunes for life for $379 shipped. Custom tunes based on actual data is extra.

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October 27th, 2009, 08:55 PM	#3
mrkmarine89 Newbie 2003 Mustang GT Join Date: Oct 2009 Posts: 3	yea idles just fine drives just fine

October 27th, 2009, 08:56 PM	#4
mrkmarine89 Newbie 2003 Mustang GT Join Date: Oct 2009 Posts: 3	i even bumped the idle up to see if that would help.. still stalled on hard braking

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