Author Topic: The car Is suddenly Dead above 3K RPM (Read 2869 times)

fiftytakedowns · « **on:** September 06, 2009, 04:46:33 PM »

After installing my CAI I was pleased wiht the way it performed/ sounded.

but after a day of spirited driving, the next day I decide to do the same.

this time, Wehn I floor it, and it climbs the RPM, the car doesnt Act the same, it Feels like it has lost around 40 HP There are no symptoms, the car sounds a bit like Wide open throttle with not much of a complete combustions/not enough gas/ air or soemthing

doesnt seem to look like vacuum leaks.

I dont think the AFM has taken a shit.
The Cat also just took a shit, and has een rattling like crazy
Any advice?

Danny707 · « **Reply #1 on:** September 06, 2009, 08:02:26 PM »

Coil packs.

fiftytakedowns · « **Reply #2 on:** September 06, 2009, 08:46:53 PM »

I have COP i just replaced the coils.

you have said coil packs for evey problem I have ever had.

roundel318 · « **Reply #3 on:** September 06, 2009, 10:40:37 PM »

did you replace the cat?
can you put the stock airbox setup back on to see if the CAI is causing issues?
does it have a heatshield?
was it warmer around the engine bay the second time when you felt a loss of power?

fiftytakedowns · « **Reply #4 on:** September 06, 2009, 11:38:05 PM »

update:
I have not yet replaced teh cat,
I know the CAI is not causing issues, I was running with hood not fully closed when testing, so cold air coming in.

Also The I unhooked the TPS and took it for a spin around the block, did not make any difference when driving. Felt the same as if it was plugged in. Food for thought

fiftytakedowns · « **Reply #5 on:** September 06, 2009, 11:43:29 PM »

I sprayed the engine with brake clean to check for vacuum leaks, no difference. I tried squeezing vacuum hoses, only affected idle a bit. replaced other AFMs, to check if it was the AFM. took off the top of the AFMS to see if it was moving the barn door correctly, etc..

The most accurate way to describe what is happenening is that the car doesn't pull hard, I just kindof accellerates until I need to shift with Wide Open throttle, and the enigne is still being loud, yet sounds duller almost. (from the CAI)

roundel318 · « **Reply #6 on:** September 07, 2009, 10:50:21 AM »

If you unhooked your TPS with no change in engine behavior, something is up with it, I might imagine.
I unplugged mine and received a 1216 plus bad idle, driving wasn't too bad though other than the idle.
This was with a moderatly warm engine, perhaps it matters when its either cold or hot?
The 1216 code is standard with it unplugged and the ECU might even run on a alternate map based on the other values received from properly working sensors and meters when this is the case.
Food for thought indeed!
What about that cat, is it plugged?

romkasponka · « **Reply #7 on:** September 08, 2009, 04:16:29 AM »

check your lambda sensor...