I have a 86, SD, 5.0L HO stang. The engine has been running great up until a few days ago. I will not idle. It surges and before anyone says pull the codes the KOEO codes are 11. I can not pull the KOER codes since I can not get the engine to idle. When I can get a relative idle as soon as I throw the ECU in to test it dies. I did get one code 98. Dead computer?
Allen
Allen