Hello nice people @ SXOC
I've been trying to debug stutter / bogging / hesitation issues in my recently bought Nissan 200sx s13 - CA18DET. The car is all stock (I think) except for a performance conical K&N air filter.
When I bought the car, just 1 month ago, it had a strange BoV, and while reving it stall / misfire @ 3k rpm.
In the meanwhile I removed the BoV, and the car got a bit better, now it revs to 7k, with some hesitation along the way. It's running rich, and the behaviour proves it, because when I punch the gas pedal in 2nd or 3rd it hesitates *hard*, but if I lift the pedal a bit it continues to rev.
Since then, I've cleaned my k&n air filter, changed the spark plugs (got the NGK Iridium ones), changed to gas filter (got a new one for the 300zx), and even tried changing the MAF.
Where should I go next ? ->
Lambda sensor
Earth wiring
Vacuum
Turbo boost leaks
.... ?
Any help would be apreciated, since no real good mechanics that know these cars here in Porto, Portugal.
Thanks & keep it up
Peppe