s14 engine twitches, and some other goodies...

[pitesy]

Hi!

Just in advance, I'm not 100% familiar with some technical words, because I'm from Hungary. So sorry about misspellings, and other grammatical errors.

So here it goes:

Engine is stock sr20det. On lower rpm's, especially between 2000-2300 the engine "twitches". Feels like it just won't fire, or cuts, or something like this. When I try to be gentle, it just gets worse. I hope you got my point. On higher rpm's I haven't experienced this. I bought the car yesterday, and had to drive it back home 1100 km's.
The car boosts fine, fuel consumption seems okay, and engine power feels okay also. Idle is fine aswell.
The previous owner said there were problems with the coils, he replaced them, and now it seems to be okay. I thought about checking/replacing plugs, checking the wires...


So please guys, any ideas where to start?

[Yeah_Mick]

has it got a dump valve?
unplug the o2 sensor and try driving without it, see if it makes a difference

[pitesy]

No, it doesn't have a dump valve.
I'll try it without the o2 sensor, we'll see. Thank you for the answer!

Edit: one of my friends gave me a hint. Could it be the TPS, if it's worn out?

[Yeah_Mick]

i doubt it'll be the tps very much

[Do A Skid]

Where is the o2 sensor? I need to try this :S Sorry for hijack

[pitesy]

Thank you Yeah_Mick!
I'll check the o2 today.

Do A Skid:



In the turbo elbow.