running poorly when cold, under load, hot restart

[Brice k]

93 EJ22-t

Mods: DP/EX, BOV, fuel pump.

Good compression, new wires plugs.

Known issues: Slight oil consumption smoke on startup assumed to be valve guides.


Car lurches slightly and strugles to get above 3500 rpm before it's compleatly warmed up. this is no big deal to me as I try to warm her up before driving.

Often the car acts the same after I have shut it off for just a few minuets to run into the store. The problem usually clears up in 30 seconds to a few minuets of driving.

Somtimes when climing a fairly steep hill I get the same reluctance, bucking at and over ~3000rpm. to the point that I am in 3rd gear doing 40 mph on the highway.

I have recently checked the function of all major sensors (ect, maf, tps, map, etc)


Any sugestions are appreacatied.

[Legacy777]

Coolant temp sensor, replace it.