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Well guys, this just never ends. I checked the BP sensor and it was fine. I pulled codes again and I think I got rid of the 22 in KOER but still get 25, 42 (of course) and 77. I'm not sure about the 22 and 77 because they may be due to Operator Error. I'll pull codes again tonite. Average gas mileage, about 15 city/highway. Sometimes it pumps out black smoke and sometimes it doesn't, but runs like a pig most of the time. Still boosts fine but stumbles on occasion. After it's warmed up, it has trouble idling when I stop, then will come up to 1K rpm if it doesn't stall completely. When that does happen, I'll start it up and it settles right on 1K rpm. Is this the TPS going south? I recently cleaned the IAC and adjusted the TPS.
Did the fuel system diagnostics and if my gauge is correct, it's pushing 70 psi at idle, I know, way too high (I will check again tonite with engine off and pump jumpered). When I drove, the fuel pressure either stayed around 70 or went below during boost. This all seems to be pointing to my Fuel Pressure Regulator because the rich running started right after I put the Walbro 255 in.
I've searched and read just about everthing but looking for a little guidance.
HELP!!
MJ
Did the fuel system diagnostics and if my gauge is correct, it's pushing 70 psi at idle, I know, way too high (I will check again tonite with engine off and pump jumpered). When I drove, the fuel pressure either stayed around 70 or went below during boost. This all seems to be pointing to my Fuel Pressure Regulator because the rich running started right after I put the Walbro 255 in.
I've searched and read just about everthing but looking for a little guidance.
HELP!!
MJ
1986 TC stock with full option package. K&N, DIY boost valve at 14 psi, Walbro 255.