Hello, I’m looking for advice with my mothers car. It’s a 98 accord v6. 200,000 miles. Recently it started surging and and almost shutting off like a bad hesitation only when driving and trying to accelerate. Car idles fine annd revs fine while it’s in park or nuetral , and when it throws a fit while driving if you put it in nuetral it is fine. When you put it back into gear the fight is in again when trying yo accelerate. I have replaced the main relay, iacv, and tps(calibrated also). There are no engine codes except and Evap code. Anyone have any ideas?

 

Currently dealing with the same issue So far I replaced

Spark plugs

ignition coils

idle control valve

TPS sensor & calibrated

Map sensor

fuel regulator and Fuel Damper

upstream o2 sensor

PVC valve

EGR also cleaned all ports

No vacuum leaks
Good compression test
​​​​​​​
good fuel pressure

did you ever find out what was causing yours