Open loop or closed loop? Spout or no spout. - Ford Mustang Forums : Mustang Forum
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post #1 of 3 Old 09-08-2012, 08:25 PM Thread Starter
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Open loop or closed loop? Spout or no spout.

Having issues with car running and starting once it heats up. Don't know if it has anything to do with it, but just wondering if anyone recommends open loop over closed loop and spout out over spout in.

Here's what I'm running:
331 with 67mm turbo 7-10 lbs
60# SD inj.
Pro tube with pmas
AFR 185
Eddy 2
All tuned through moates.
Bank 1 o2 only. No egr

If anyone is running 60# inj, can you tell me what high and low slope you have.
I know I have to fix my gap, I'm sure it's way to big, as it was set to n/a specs, but I don't think that would cause the stall and no hot start issue I'm experiencing.

Replaced and checked all common culprits, tps, pip, coil, grounds, etc.

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post #2 of 3 Old 09-09-2012, 10:58 AM
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My car when warmed up if i go to re-start it ...It starts right up..but if it sits for awhile it wont just cranks...So i press the pedal to the floor,it starts right up...from what i was told its in the tune something to do with the injector value on start-up..i havent brought it back to get that corrected yet..other then that my car runs great so it doesnt bother me to my weird mind its like a theft one will know how to start it....

Turbo installed!!!!
87 GT Vert.On3 turbo making 14 psi,Trickflow TW 170cc heads,TF street heat intake,70mm TB,stock cam,1.6 roller rockers,Snow performance stage 2 meth kit,42# injectors,340 lph fuel pump,AOD,Lentech VB,electric OD 3000 stall.3.55's
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post #3 of 3 Old 09-09-2012, 04:34 PM
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It's common to have rich cold start issues in the tune since the whole time your tuner is messing with the car it is warmed up and they will never see what needs to be adjusted to get it to start good cold. I had the same issues and it took some time to get it fixed as the tuner could only see it for 5-10 minutes a day so it took him a few shots after letting the car sit and fully cool each time he adjusted something.

Open loop (wot) ignores the o2's and is obviously all in the tune, so if that not right its most likely a tune issue. Closed loop where it adjust fuel for part throttle and crusing uses the 02's so if the issue is closed loop could be some tuning or a bad 02 sensor etc.

07 Grabber Orange GT Prem/Vert/6060/3.55
S&H Twin turbo kit, 6262 oil-less Comp turbos
9:1 compression 281, turbo cams, e85
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