MCX symptom on APEX Whats wrong?

[Boost It]

Thanks rxrider, I'm very happy now that they are running.
Stock fuel mapping was threw off because the turbo introduced forced air pressure to the system. Fuel air-ratios changed.

Ken_climb.......he used a Boondocker.

 

[rxrider]

Strange thing. Now we are having a similar problem on a friends Apex, much like the problem you had. We have had nothing but problems since we started the install. 1st fuel delivery for boost did fail on us, causing detonation. We put Wiseco low comp pistons in, and got a 320+ HP kit installed, now it sounds like it is running on 3 cylinders only???? Before we tore it down it ran on all 4. I think it is something wrong in the electronics but we have no way of troubleshooting it. Owner decided to take it to MCXpress to have them figure it out, luckily we are only 450 miles away from them.

 

[TURBLUE]

My MCX Turbos are working.
Brandon at CookCityMotorSports Cook City,Montana has fixed the problem.
It was not an install problem.
It is a fuel delivery problem.
The symptoms where:
1. a bottom end stumble or cough.
2. a 7000 rpm stumble or cough which caused the machine to surge.
How did Brandon achieved the fix?
Buy adding an EFI control box to alter the stock efi fuel delivery. (take a little here, add a little there).
Cold air intake (extended with an elbow to exspose the K&N fliter outside, back of the exhaust side cover).
Locate the air box air temp sensor out side .
Very Special THANKS to Brandon.

Which change helped the most? I have a bottom end bog

 

[Boost It]

Adding the efi control box.