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1995 GT Mustang MS2 Surging Idle

  • Thread starter Thread starter oleydd970
  • Start date Start date Jul 27, 2024

oleydd970

Member
Oct 14, 2006
41
2
18
Miamisburg, Ohio
Jul 27, 2024
#1
  • Jul 27, 2024
  • #1
Hey Guys, it's been awhile since I've been on here. Late last summer My car got to the point it would not idle once it was warmed up. I noticed fuel pressure was dropping, which led me to find a vacuum leak on my 8-10 year old Holley adj. FPR. I have a BBK SSI intake and Fuel Rails on my car, which led to my dragging of my feet to replace the FPR due to concerns of creating a fuel leak with the BBK setup. I finally put a SVE adj. FPR on and have no fuel leaks. Before with the Holly FPR i was only able to get like 38 psi out of it. I have installed the new FPR and have it set for 40 psi at idle. I have recalibrated the TPS and run autotune. The idle has gotten better, but if I rev the engine, it wants to stall and hunt by overshooting and under shooting.I can keep it alive by the throttle and it will idle. But the car is un-drivable like that. If anyone can give me a hand here it would be greatly appreciated. Also, does anyone know of anyone offering tuning training, I would be willing to pay, obviously. I would just like to have a better understanding of what is going on, especially at idle. I understand how the IAC system works and all, just not how to adjust it for the MS2. I'll include a copy of my latest tune, and I have'nt recently logged any data, but I can if need or wanted. Thanks.
 

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