HI!... I don't want to hyjack this thread but tonight while cruising the strip, my truck started bucking and shuddering. It felt just like when your running on 6 or 7 cylinders due to a bad cop or a mis firing plug. I limped the truck home and started pulling plugs. All the plugs were good but the gap was off a bit. I had them set at 0.45 and they were at 0.55. It's been about 6000KMS since they were installed. So I re-gapped them and checked all mu cops and reinstalled everything. Start up the truck and it runs like crap again, just like a mis fire. Now the stupid SES light finally decideds to come on and I scan the codes with my XCAL-2. I also pulled P0171 and P0174 codes. Running lean on bank 1 and band 2. The weird thing is, that my INNOVATE MOTORSPORTS WIDEBAND gauge is telling me the truck is running pig rich at 10.5:1 at idle. It's usually at 14.7:1 (STOICH). Now I went throught the list on the FORD service CD. Now I have a mechanical fuel pressure gauge on my truck. 32PSI at idle and 41PSI at WOT. This is constant and has not changed. So it's not a fuel delivery or fuel pressure problem up to the fuel rail. Fuel filter is new. No fuel leaks and FPR (AEROMOTIVE) works fine. Vapour recovery system checks out, no vacuum leaks, PCV works fine, no leaks after the MAF, oil dipstick is seated, EGR system checked out fine.
I did run some C-16 race fuel in the truck a few weeks ago. It's leaded. But it was only 5 gallons diluted into 20 gallond of SUNOCO 94. Tomorrow I'll pull the O2 sensors and check them, also pull and clean my 42LB fuel injectors. If those two thing don't work, I'm lost due to everything else has been checked and triple checked.