I really need some help on this one guys.
I go to drive my car and I get a CEL light. I have quite a few mods, and the CEL comes on very infrequently but at random times. So I just blew it off for a little while to see if it would just go back off like it usually does. Unfortunately, it was on for about 3hrs ( not constant driving) and my car started acting like it was running on 3 cylinders. I have new bosch platinum 4 spark plugs.
Please help if you have any sudgestions or if you would like a better description just ask.
Please help and thanks a lot.

I recommend going to autozone and see what the code is.

Make sure your wires are snapped all the way onto the spark plugs.

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

make sure they are gapped properly

I had the same problem when I put in the new cams. My first suggestion would be to check out the trouble codes or pending codes for the MIL(malfuncion indicator lamp). My problem was the MAP sensor, and the EGR system. I first replaced the MAP sensor and that did not fix it. When I replaced the Exhaust Gas Resurculation Valve and Solenoid, it ran like a charm.

AEM Cold Air Intake, HP Racing Header, Greddy Evo Cat-Back Exhaust, Centerforce Dual Friction Clutch, JET performance ECU, MSD ignition, Crane Valve components, Crower Stage 2 Cams.

Do you think that my AFC controller could be causing any problems due to it tricking the MAP sensor?
Where would be the best place to get the parts?

thanks for you help guys, much appreciated.

Little side note....
Worts luck this morning. I wake up to my mother telling me to go look at my car cuz my step dad just backed into it. I am in the navy and am only home on vacation for 5 days. Now I have no ride, and a way to get back to my command until my car is fixed

what are your "mods"? this might help us tell you what the causes might be.. also check what the code is and let us know.

-97 GS (First project, 299 whp)(sold)
- 97 RS 2.6 last numbers: 306hp, 352tq @16psi (Dead, parted out)
- 99 GS OZ, Hahn Kit, 56k miles (Sold)
--------
- 00 Nissan Maxima GLE (Daily Driver)
- 02 Audi A4 1.8T Quattro

Mods as follows....

2.5" AEM cold air
Greddy 4:1 Header
Greddy Evo 2.5" cat back
2.5" Test pipe
Crane Stage II cam (#14 I believe)
AEM adjustable cam gears (Just set to 0 degrees)
Top Speed lightened underdrive crank pulley
S-AFC II
Ground control coil overs
Front strut bar
Front and rear Suspention Techniques sway bars
18" Motegi MR7 rims

Unfortunately I didn't have an oportunity to get that code checked out because of my idiot stepfather backing into my car. Repairs are going to cost $3000.00...
I can't stand my family sometimes...

I am betting the code is either the MAP or FRU.

thanks guys