• PO303 and 304 codes
  • Started by pacmanzx2
PO303 and 304 codes
on: April 08, 2011, 05:43:47 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
Ran a code check and got a PO303 and 304 cylinder misfire codes. Can anyone recommend any possible causes and/or solutions for this problem?
It would be much appreciated. Thanks.


Re: PO303 and 304 codes
Reply #1 on: April 13, 2011, 09:26:12 AM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
Plugs, wires, coil pack first and easiest things I would check out first.
MMI CAI, ZXTuner Header, 2.5" Stainless Tru Bendz, MSD Coil, Ford Racing Wires, TWM STS, SCT xcal3, Cam Gears W/ VCT Delete, Fiddy Flywheel, Spec Stg. 2 Clutch, UDP, 16" TSW, S/R Cluster, S/R Knob and Boot, 98 VC, Steering Wheel/Hub, VIS CF Hood


Re: PO303 and 304 codes
Reply #2 on: April 21, 2011, 03:50:47 PM
« Last Edit: December 31, 1969, 04:00:00 PM by Guest »
I have already changed the plugs,wires,and coil. Could valve float be a possibility?