What going on guys. Im fairly new to the Scion Tc's and need a little help. I have an 05 Tc with a Greddy Turbo . I recently replaced the Greddy plugs that I had with some AutoLite "XP's" and everything was going great until my car started breaking up under throttle and sometimes it stalls. I got a check engine light and checked it with a scan tool and its reading a coil pack malfunction with all cylinders.
Now my question is could this be because of the plugs? And reason why im asking is because a friend said it may be a problem with the emanage. Has anyone come across this problem before? I just wanted to check on the boards before I spent $100.00+ on new coil packs. Any help is much appreciated.

 

Put the old plugs back in, reset ecu and see if problem comes back. Ps if your changing plugs put in the IK24's. I think they are made by denso.

 

Also make sure the gap is correct.

 

Yesterday I replaced the sparkplugs w/ Denso IK22's. Stock heat range is 20, so the 22's are one step colder. They come pre-gapped at .028, so I figure that's fine for boost. I reset the ecu and went for a test run. Normal driving was fine, but as soon as I stepped into boost, the engine started breaking up and stalled. I pulled off the road and the engine code was the same as before...all 4 coils

Funny thing is that the entire set up has been fine for thousands of miles. It only started screwing up when some jerk used autolite sparkplugs

 

i've been having trouble blowing coil packs in my car as well. dont know why though?

 

i'd check to make sure all the plugs are tightened down first.

but otherwise, i'd say it seems pretty obvious. If it was fine before u changed plugs, then u changed plugs and its F'd up.....then its probably the plugs.

 

Does your car sound like an WRX sound? When you stepped the Gas does it seem that its doesnt have any horsepower? IF so then it is the Emanage. Thats what happen to me so i had to get a new Emanage.

 

omg.... the noobness is killing me! :D

don't even know where to start.

 

Nope. The car sounds exactly like it should. There are no errors in the emanage. I forgot to mention that it was tuned on the wastegate set boost levels. AFR is ~11.0-11.5 at full throttle.

 

Maybe bad gas?