I know this is the most common problem for fox mustang but this has everyone stumped.
Car was originally a 4 cyl. and I have converted it to 5.0 efi. harness and a9l computer. The car will start then die. I can feather the throttle for about 1 min and get it to idle but soon as you blip the throttle hard or restart it will immediatly surge to point of dieing. dies at stop light/signs. I can not get this car to idle right what so ever. here are the mods
Stock 95 short block
flo tek heads (gt40 aluminum X equivalent) 1.90in 1.56ex 180 runner 58cc
B-cam ( I know its a dinosaur cam) (cam is 4 degress advanced)
Explorer lower and upper (port matched to heads)
Scorpion 1.72 stud mounted rockers
Professional products 70mm throttle body
Under drive pulleys
Granatelli CAI
Stock injectors
Stock mass air meter
Ceramic shorty headers
High flow cats/ x pipe/ magnaflow mufflers (2.5in all the way)
Aluminum flywheel/driveshaft
New IAC with bypass (fully open)
I have done the serging idle check list and everything checked good.
TPS voltage at .98
Cleaned 1o pin
O2 are switching (both new)
Mass air at .9 volts at idle
Grounds are good.
ACT and ECT voltage/ohms measure good (both new)
IAC good (new)
No codes
Fuel pressure 38 plugged 42 unplugged (new pump)
Timing set 10 degress spout out, 21 spout in (new distributor)
New plugs/ wires/ coil
Reset the KAM on every adjustment
I have swapped PCM and mass air with known good parts off another modded non tuned fox
so i'm starting to rule out electrical. The injectors and mass air come off a perfectly good car.
The car will idle with the mass air unplugged or with a small vaccum line unplugged so the car i know is runing rich. the plugs are black and only have 20 miles.
Can anyone point me in the right direction please.
Car was originally a 4 cyl. and I have converted it to 5.0 efi. harness and a9l computer. The car will start then die. I can feather the throttle for about 1 min and get it to idle but soon as you blip the throttle hard or restart it will immediatly surge to point of dieing. dies at stop light/signs. I can not get this car to idle right what so ever. here are the mods
Stock 95 short block
flo tek heads (gt40 aluminum X equivalent) 1.90in 1.56ex 180 runner 58cc
B-cam ( I know its a dinosaur cam) (cam is 4 degress advanced)
Explorer lower and upper (port matched to heads)
Scorpion 1.72 stud mounted rockers
Professional products 70mm throttle body
Under drive pulleys
Granatelli CAI
Stock injectors
Stock mass air meter
Ceramic shorty headers
High flow cats/ x pipe/ magnaflow mufflers (2.5in all the way)
Aluminum flywheel/driveshaft
New IAC with bypass (fully open)
I have done the serging idle check list and everything checked good.
TPS voltage at .98
Cleaned 1o pin
O2 are switching (both new)
Mass air at .9 volts at idle
Grounds are good.
ACT and ECT voltage/ohms measure good (both new)
IAC good (new)
No codes
Fuel pressure 38 plugged 42 unplugged (new pump)
Timing set 10 degress spout out, 21 spout in (new distributor)
New plugs/ wires/ coil
Reset the KAM on every adjustment
I have swapped PCM and mass air with known good parts off another modded non tuned fox
so i'm starting to rule out electrical. The injectors and mass air come off a perfectly good car.
The car will idle with the mass air unplugged or with a small vaccum line unplugged so the car i know is runing rich. the plugs are black and only have 20 miles.
Can anyone point me in the right direction please.