1990 mustang way too rich
#1
1990 mustang way too rich
Got a 1990 mustang ECU (a9p) / harness in my 95 F150. Ran fine for a year after the swap. I recently had some down time with it (3 months) to install a new transmission / control module and a full lightning suspension. Problems started after the downtime.
It runs so rich that it will not start unless the tbody is cracked open a good 3 turns, hunts for idle and stalls after that. of course I can drive it power brakeing and runs good, just lacks power for obvious reasons.
Here is a list of non stock parts on the motor:
RPM heads
270/270 cam
#30 injectors
75mm MAF / t-body
performer 5.0 intake
EGR delete
351w bottom end
165 degree tstat
heavy duty clutch fan
2 core radiator
Checked so far:
vacuum - 15 inches on idle (once it settles down enough)
Fuel pressure regulator
ACT
ECT - changed
MAP
MAF
Cap / rotor / plugs (it was over due and the plugs were fouled black)
TPS
At a loss as to what to check next, if you tell me to revisit something I will, because I must have missed something.
It runs so rich that it will not start unless the tbody is cracked open a good 3 turns, hunts for idle and stalls after that. of course I can drive it power brakeing and runs good, just lacks power for obvious reasons.
Here is a list of non stock parts on the motor:
RPM heads
270/270 cam
#30 injectors
75mm MAF / t-body
performer 5.0 intake
EGR delete
351w bottom end
165 degree tstat
heavy duty clutch fan
2 core radiator
Checked so far:
vacuum - 15 inches on idle (once it settles down enough)
Fuel pressure regulator
ACT
ECT - changed
MAP
MAF
Cap / rotor / plugs (it was over due and the plugs were fouled black)
TPS
At a loss as to what to check next, if you tell me to revisit something I will, because I must have missed something.
#3
I was having problems with overheating last summer, 192 was too close to the hot side of the gauge.
I plan on putting in a 180 now that I have a good cooling system that can keep up.
I know that the 165 tstat will cause it to run a little rich, this problem happens as soon as I crank the motor, so it should be unrelated.
I plan on putting in a 180 now that I have a good cooling system that can keep up.
I know that the 165 tstat will cause it to run a little rich, this problem happens as soon as I crank the motor, so it should be unrelated.
#5
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