Hello scotty,
after month long work still cannot find the issue.
acura tl 2001 starting stalling a little on highways at low rpm but at higher rpms there is not stall
sometimes the car does not start and after 5 minutes it starts but is stalling but i have to keep reving it stop the stall
things i did to resolve the issue
new spark plug
oil change and oil filter
cleaned egr valve
cleaned throttle body
cleaned intake
it is a v6 5 speed automatic
please help
How old is the fuel filter? Fuel pump? Air filter?
Fuel pump is 3 month old and rest were changed a month ago
Is fuel pressure up to specification? Are fuel injectors clogged? What do codes and live data show? A lot can go wrong on a 22-year-old car.
If the idle is surging it can be a stuck "Idle Air Control Valve".
The engine will cold start no problem, but have problems idling after restarting a warm engine.
Fuel pressue is for acura tl fuel injectors i checked looked ok to the mechanic i cannot get live data show and code is 1399 but it doesnt come everytime
P1399 is a Honda code for random misfire:
https://www.obdadvisor.com/p1399-code/
https://www.engine-codes.com/p1399_honda.html
When is the last time valves were adjusted? EGR valve was cleaned but if there is any plumbing associated with it was that checked?
Freeze-frame data when the stalling occurs would likely be helpful in diagnosis.
Fuel pressue is for acura tl fuel injectors i checked looked ok to the mechanic i cannot get live data show and code is 1399 but it doesnt come everytime
It is not surging it goes low around 0.1 and i have to rev it so many times to get normal