I have a DynoTune WB O2 in the truck with digital readout. I think it is a branded LC-1. Everything has been fine up until this a.m. Outside temp was high 30's-low 40's and it was reading the typical start up 12.8-13.2. Once it was warm it was still good at 14.6. After I got on the road the AF started running lean at 15.0-15.2. Any acceleration would go rich to 9.2-10.2. When cruising at 55-65 it would hover around 15.0 and occasionally blip up to 15.2. I also noticed that the engine temp was running higher than normal. Not hot, just higher by about 4-6 degrees. I had to get on the throttle once to make a semi-evasive manuever but couldn't watch the guage. But after that it was pegged at 49.5!!! I stopped, shut the truck down and re-started. That cleared the guage but it still ran a bit lean for the remainder of the commute.
Anyone got any ideas???
'02 Silverado Z-71, STS Turbo @ 10psi, TRT Custom FMIC, Comp 222/218/115 cam, Patriot Gold Dual Springs, Hardened Push Rods, 60# injectors, 160 Thermo, FAL E-Fans, Nelson Harness, Yank 2600, Built Rock On VacMod 60E Transmission,Walbro 255 fuel pump, ASP Underdrive pulleys, Gibson Shorty Headers all polished up with a Nelson Street Tune
Reply With Quote
