My 1991 Toyota 4x4 Pickup with a 22RE engine with 5 speed manual tranny has been running roughly at idle. A mechanic friend of mine ran a test that showed a code for the for the speed sensor. Could the speed sensor be causing the rough idle? Also, there is a lack of power on incline. Last winter in a headwind I had the gas floored in fourth gear just to keep up speed on the freeway. The engine is tight, uses no oil and has good compression in each cylinder. I'd really like to know about the consequences of a bad speed sensor. Thanks in advance for any helpful info.
PS. Plugs, wires, cap and rotor are all new and new cat converter is installed. Ran rough before and after these improvements. Thanks again!