Car: 1986 Thunderbird 5.0 Aod speed density
Mods: Edelbrock upper and lower intake
65mm prof. Products throttle body
Sve cold air intake
Sve under drive pulleys
3g alternator upgrade
4 gauge power and ground wires
Bbk shorty headers, catless, flowmaster 44s
Charcoal canister delete
Egr, tab, and tad deletes
Driveshaft shortened 1"
Msd distributor, cap, rotor, and coil
Ford racing spark plug wires
New parts: Iac, act, ect, brake booster, master cyl., distributor, cap and rotor, cyl 1 injector, water pump, fuel filter, valve covers, belt.
Codes: 84 and 85.
Problem: the car likes to stall when cold or coming to a stop. It's stalls worse when it is cold. Recently I repinned and wired the act and seems to be a lot better. While doing so I figured out that with the act unplugged the car does not stall. It will idle at 1100 rpm in park and 800 in gear. With the act plugged in it will idle at 900-1000rpm in park and 600 in gear, but for about 10 seconds. After that it will chug to 400, then 800, down to 100 - 200, then back up and settle at 600 for about 10 more seconds and repeats the process. I cannot figure this out for the life of me. It's basically boiled down to ecu. Any help or advice appreciated.
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