Question for you Joe

[02S281]

I've been having an issue since installing the KB 2.1 kit on my car. Sometimes when its WOT and i shift into 3rd or 4th high in the rpms the car bogs down, doesn't do anything, sometimes actually shuts off if i don't get out of the throttle immediately. If i get out of the throttle, wait a couple of seconds, then it is fine and i can get back on it.

Im really confused on what it could be, i've talked to KB several times but its nothing they say. I personally think it might be a bad tune that i got that came with the kit and im hoping that a tune from you guys will fix this issue.

Have you ever heard of this problem before? and do you think you could resolve this issue?

 

[02S281]

bump

anyone have any ideas?

 

[02S281]

Joe you still on here? lol

 

[MaximumRisk]

It sounds like you the car is running really lean, like you are running out of fuel. Which fuel pump are you using? Injectors?

 

[MaximumRisk]

DO you have a wideband installed? if so what are your AFRs when it shuts off?

 

[02S281]

I don't have a wideband installed unfortunately, i know i need one.

That what i though about the car getting really lean, but why is it only when shifting high in the RPM's?

Its 36lb injectors, stock fuel pump w/ KB BAP.

 

[MaximumRisk]

maybe your injectors are maxing out or you might not have enough pump (even with the BAP) or your tune might not be supplying enough fuel at those RPMs. No real way of knowing without a wideband though.
My advice to you is not to drive the car until you know for sure; you do not want to melt a piston. Call the guys at Mustang Magic and have them go over your tune and go from there
l

 

[magic maker]

Sorry it took so long to get back to you, I've been really busy @ the shop. The bog may be caused by the tune, but I doubt it. Let me ask you a question, how much fuel was in the tank when you had the problem? If you were below 1/4 tank that could be the cause.

 

[irishpwr46]

a lot of cobras have the problem with dying out below 1/4 tank

 

[02S281]

Sorry it took so long to get back to you, I've been really busy @ the shop. The bog may be caused by the tune, but I doubt it. Let me ask you a question, how much fuel was in the tank when you had the problem? If you were below 1/4 tank that could be the cause.

It's all good man. Sorry i haven't gotten back to you about getting to the shop on that sunday, i just want to figure out this matter first.

No, actually the most recent was right after i filled up. It like bogs down, kinda dies but if i get outta the throttle for a few seconds then its fine. Like someone mentioned above, maybe its getting really lean? Which would probably come with the tune KB set me with right?

 

[magic maker]

We have seen KB tunes that were very lean, so could be. Better get it on a dyno to check. Joe

 

[02S281]

Alright, give me a few more weeks and i will be down.

You said $500 right since i can only get in on sundays since i have the police academy on saturdays.

I will call you to set something up and see your availability for sundays.