I have a ‘91 YJ with an auto trans
Recently did an engine swap
Jeep has 109k miles on it
new engine came out of a good running 90k miles Jeep
Engine came out of a ‘92
When driving it around town it runs fine
I am noticing that when you give it more than half throttle its not that responsive
On the the highway when you floor it
it does engage the trans kickdown
but it struggles getting up past 50
It has 31” tires on it
I have 3 other jeeps with 4.0 engines including a TJ with 33” tires
none of them are as slow to accelerate as this one is.
So i did the engine light code check thinking maybe its a map sense or tps sensor
I am getting codes in this order
12
75
73
35
55
I cant find 75 and 73 anywhere online for descriptions of them.
Anyone have any suggestions on where to start ?
I also just changed the fuel filter about 25 miles ago
and the trans is not slipping
it shifts firmly in to every gear
Recently did an engine swap
Jeep has 109k miles on it
new engine came out of a good running 90k miles Jeep
Engine came out of a ‘92
When driving it around town it runs fine
I am noticing that when you give it more than half throttle its not that responsive
On the the highway when you floor it
it does engage the trans kickdown
but it struggles getting up past 50
It has 31” tires on it
I have 3 other jeeps with 4.0 engines including a TJ with 33” tires
none of them are as slow to accelerate as this one is.
So i did the engine light code check thinking maybe its a map sense or tps sensor
I am getting codes in this order
12
75
73
35
55
I cant find 75 and 73 anywhere online for descriptions of them.
Anyone have any suggestions on where to start ?
I also just changed the fuel filter about 25 miles ago
and the trans is not slipping
it shifts firmly in to every gear