TPS voltage- probe green/black wires on tps switch KOEO(key on engine off) should read 0.7v therebouts since i had a bigger t/body i had to slot the mounting holes to get this
Base Timing- on my ED, under the fuse panel theres a diagnostic terminal/connector, with the key off connect the top & bottom pins on the leftside of this port with a jumper wire, start eng & if done correctly car will automatically idle to about 1600rpm. with timing light connected adjust timing to 30deg BTDC or whatever you prefer mines set at 34deg, turn off key & disconnect jumperwire
1 cause of surging on manuals EECIV this is why mine surged abit & took a bloody long time b4 someone(other than ford) found the prob....
Maybe caused by a lack of neutral drive switch signal to the ecu.The switch is on the T5 box&looks like a reversing light switch. It provides a signal to the ECU to provide different idle calibrations if the car is in gear or not, there is NO fault code for this!!!! The switch has a 5v supply from ECU pin 30 & the return is to pin 46.
When in neutral,pin 30 should read 0v , in gear 5v ELECTRICKERY AINT YA JUST LOVE IT
Hope it helps someone