Removing header and 3" exhaust to help stop stalling?

[208DSM]

so i have finally wasted too much time and money. i have a brand new 420A with 3,000 miles on it, i've had it back from the shop since April, it ran GREAT when i got it back, no stalls, no hesitation, nothing. then a month and a half later i put a header and full 3" Megan racing exhaust. about 10 days later i had my first stall. it just randomly died. car didnt overheat or anything. so about an hour later it started back up and i made it home from boise perfectly fine no problems. then it started doing it more and more. just randomly dies, when im driving at 25mph, 50mph, 70mph. so i replaced the fuel pump, fuel filter, crank sensor, cam sensor, cam sensor connector, coil pack, coil pack harness, upstream o2 sensor, IAC, cleaned the throttle body, fuel pressure check and everything was good, yet it broke down again. then 45mins later starts back up and drives good, when it runs it runs great. so ya, removing header and exhaust, good idea considering it never did it till i put the exhaust on? i think my header is making something too hot and causing it to stall. IF YOU HAVE ANY OTHER IDEAS PLEASSEEEEEE REPLY TO THIS. I CAN USE ALL THE HELP I CAN GET.

 

[92AWDHX40]

A header making it stall not sure, something else is going on you replaced all that, i would have had a shop in the area check it out first. Could be anything, that stuffs not cheap.

 

[208DSM]

A header making it stall not sure, something else is going on you replaced all that, i would have had a shop in the area check it out first. Could be anything, that stuffs not cheap.

i had a mechanic look at it, he said crank sensor, so we paid him $200 to replace it(which was ridiculous) and it did it again. i've had it hooked up to computers and everything and getting good readings on all components. i just know the header puts off MUCH MORE heat than my stock manifold did and i know lots of those parts are heat sensitive. i just dont know what else to check? could a bad cat do it do you know?

 

[volkerding95GSX]

Do you have a heat shield or heat wrap on the exhaust mani? Usually 3" exhaust is used by turbo DSMs, a full 3" on a n/a isn't the best way to go.

 

[208DSM]

no i thought about heat wrapping it but i just wanna go all back to stock exhaust. i know its WAY to big for a non-turbo, i picked the exhaust up for cheap and just wanted to test the sound, hate it haha. so im selling that and going back to stock exhuast and maybe do a 2 1/4 catback or somehting more suitable for my car.

 

[volkerding95GSX]

no i thought about heat wrapping it but i just wanna go all back to stock exhaust. i know its WAY to big for a non-turbo, i picked the exhaust up for cheap and just wanted to test the sound, hate it haha. so im selling that and going back to stock exhuast and maybe do a 2 1/4 catback or somehting more suitable for my car.

That sounds like a really good plan to me You never know what a full 3" exhaust is telling your MAF and ECU. If it was running good before while stock, a proper sized cat back should give you the sound and reliability you wanted in the first place. Good luck bud!

 

[208DSM]

Alright sweet!! thank you very much. its nice to have some encouragement cause this is getting old!! i want my baby on the streets again! haha. thanks again, i really appreciate it!