Ecm In Limp Mode/ Iac Error

My 93 K1500 Is Pulling Code 35 - Iac Error. I Replaced The Iac Last Year So Im Not Sure If The Valve Is Bad Or If Something Else Could Be Throwing This Code. The Truck Is Also Throwing Code 44 (o2 Sensor Lean) But My Truck Is Running Very Rich And Only Getting About 8 Mpg. I Think The Ecm Is In Limp Mode. What Should I Do To Get The Ecm Back To Normal?

I Need Advice!!

ALSO I HAVE HEADERS AND TRUE DUAL EXHAUST. DOES ANYONE MAKE AN O2 SIMULATOR FOR ANY OBD1 VEHICLES, A 93 SILVERADO 5.7 IN PARTICULAR? OR DOES ANYONE KNOW HOW TO GET AROUND AN O2 SENSOR READING LEAN BECAUSE OF HIGH FLOW EXHAUST?

:banghead: I HAVE "EXHAUSTED" ALL OPTIONS THAT I CAN COME UP WITH.

HELP ME................................................ ...............................

ALSO I HAVE HEADERS AND TRUE DUAL EXHAUST. DOES ANYONE MAKE AN O2 SIMULATOR FOR ANY OBD1 VEHICLES, A 93 SILVERADO 5.7 IN PARTICULAR? OR DOES ANYONE KNOW HOW TO GET AROUND AN O2 SENSOR READING LEAN BECAUSE OF HIGH FLOW EXHAUST?

:banghead: I HAVE "EXHAUSTED" ALL OPTIONS THAT I CAN COME UP WITH.

unhook batery for five mins

it wil reset the ecm

then put you factory exsaust back on till you find a sim

then try this old trick for performace put a 305 head on one side and 350 on the other then put a flowmaster on the factory exhaut have flowmaster placed uder the bed with no tail pipe this should give more low end touque and tough sound header don't do any thing but make your ecm go crazy

and summit or jegs has your sims