I need to solve this issue, it's drivin me nuts.
When I aggressively accelerate on the freeway, the car seems to sputter and stutter during acceleration. I have had the wires, rotor, plugs replaced with factory. I get a misfire in cylinder 5 code. My mechanic at the dealership who I trust, he services on the side for me, can not find the problem, he indicates possibly a catalytic code has presented itself. I can not use this car at the peak performance it is capable of. Please help me to find this gremlin, so as I may smoothly jamm it past 90, as the car deserves to go. Safely of course. All points bulletin.

Regards;

Jimmy Scotsman

 

You check your O2 sensors, MAF, replace the cat, check your vaccum lines, check your turbo hoses. And if you find cracks in the vaccum lines and or turbo hoses replace them with Silicone ones either from SAMCO which can be bought from Viva Performance and or Stylin Motors Inc. The vaccum lines should be switched to silicone as well and can be bought from Stylin Motors Inc.

 

Replace cat, this means catalytic convertor?

 

Yes

 

Check O2 sensor.
Check compression for Burnt Valve.

 

Thanks gentleman, will heed your valued advice.
Scotsman