Found the location.
Replaced it.
made the engine run better, but did not fix the problem.
If I drive on hwy at sustained speed of 60mph or better, after .5 miles the engine starts to run rough
I am thinking that it is running out of fuel.
I have replaced
fuel filter
O2 sensor
fuel press regulator
Fuel pump sounds steady when turning key to on posistion with engine off.
The fuel pump runs for about 1 - 2 seconds
I also get check engine light when at hwy speed.
light stays on until engine is shut off.
when restarting, check engine light is off.
Codes are
172
122
412
1.9 liter
auto trans
what next?