Good morning I ham beating my brains out chasing a problem
the truck is a 4.0 82k miles automatic transmission.
it will be slow to fire probably 4-5 revolutions. then it will fire. it will run decent until the truck goes into closed loop then it will have a slight surge when idling I can hear when it goen into closed loop as the rpms will drop down real low than it will go into surg mode.
it also has a slight stumbling issue at the start of the throttle range maybe 20 percent in
while under a load or under acceleration it seems to run fine just at cruzing speed about 45 mph, or in nuetral about the same thottle
what i have replaced.
Mullfer
Cat (was plugged)
02 sensor
TPS
Fuel filterr
spark plugs
map sensor
Crank position sensor
mods
firewall ground direct from battery cleaned paint assed no-ox
