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Max777 · 08-24-2011, 10:28 AM

So, ever since I tore apart my car to paint the engine bay last year, it never ran quite the same after reassembly. I messed around with it but it never got very far, always running into issues.

This summer, I got tired of trying to make it work on the factory ECU, and had Chris Ludwig install a Haltech Sprint-RE standalone ECU, thinking that this would solve all my problems. He did a great job, and my car picked up 30ft-lbs of torque from stock on a Mustang Dyno, however we ran into an issue with the factory S4 TPS. Since it's a short range sensor, it only reads about 30% throttle input. Any more, and the ECU thinks it's being given 100% throttle.

This wasn't an issue for full throttle tuning, but it did result in a lot of hesitation during part throttle cruising. The recomended fix was to install an S5 TPS and throttlebody and use the full range TPS that normally controls the OMP function.

I also managed to score a godspeed front mount kit for cheap for the same person I got the TPS from, so hopefully they get here soon.

Besides the engine woes, I also have been neglecting the rest of the car for some time. It really needs a paint job, so I've been saving up for that.

08-24-2011, 10:28 AM	#2
Max777 Pirate Join Date: Mar 2008 Location: Central IL Posts: 1,323 Rep Power: 19	So, ever since I tore apart my car to paint the engine bay last year, it never ran quite the same after reassembly. I messed around with it but it never got very far, always running into issues. This summer, I got tired of trying to make it work on the factory ECU, and had Chris Ludwig install a Haltech Sprint-RE standalone ECU, thinking that this would solve all my problems. He did a great job, and my car picked up 30ft-lbs of torque from stock on a Mustang Dyno, however we ran into an issue with the factory S4 TPS. Since it's a short range sensor, it only reads about 30% throttle input. Any more, and the ECU thinks it's being given 100% throttle. This wasn't an issue for full throttle tuning, but it did result in a lot of hesitation during part throttle cruising. The recomended fix was to install an S5 TPS and throttlebody and use the full range TPS that normally controls the OMP function. I also managed to score a godspeed front mount kit for cheap for the same person I got the TPS from, so hopefully they get here soon. Besides the engine woes, I also have been neglecting the rest of the car for some time. It really needs a paint job, so I've been saving up for that. __________________ Rotaries:They are NOT that complicated!