98ZEMT

iTrader: (5)

Yep, I have the dreaded PO121. My car has been dynotuned after cam install. The idle still kinda sucks. But only when its cold. But almost everytime I take off now it goes into limp mode. It's driving me nuts. I assume its in the tune. What is the solution to this? I've read about desensitizing the tps. But I also read that is just a band aid. That something else is actually wrong with the system. Someone please enlighten me. Thanks.

Old Geezer

iTrader: (3)

What tuning suite was used to do the dyno tune??
datalogs and a .tun file posted may let others see wtf is wrong.

98ZEMT

iTrader: (5)

I think he uses hp tuners. Not sure. But now I'm throwing a po102 and the car is running like ****! Is this a bad maf? Or related to the po121?

1BAD_LS1 Tunes

iTrader: (8)

your tuner should have disabled your setup from being able to have that error!!! when you have a big cam it will cause this error...

Error min map to 0 and error max map to 100....

98ZEMT

iTrader: (5)

I found out the po102 code was due to my tuner hooking the rear o2 sensor back up under the tranny crossmember instead of above it, causing the o2 sensor connector to catch something and break in half making the wires short against the crossmember. Now that light is off. Thank God. It kept blowing fuses and I couldn't figure out what the hell it was. Since then I haven't noticed the limp mode again but I didn't drive it very far. So, I guess I'll wait and see.