B18 engine problem

[mokus]

Hi!

A friend of mine bought an MC2 1.8 vti +LPG.

Today I drove the car and it has a strange engine problem.

Pulls almost fine, nothing too bad problem, so its stock"ish" power I think.

Only problem is, when I drive it easy (throttle lightly, normal city drive), throttle disappears for 2-3 seconds, I feel it on the pedal, nothing happens, then it kicks and pulls again.

Its around 2600-2800rpm, i drove it in 3th gear, and I could repeat the problem again, so its that range, where its bad,

Any ideas? :\

[dmrichards]

could be a misfire? check the plugs, leads and cap and go from there 

[Guest mokus-phone]

Plugs are new, leads are old blue ngk.

Im thinking about the dizzy or o2 sensor

[Krzys]

Change the leads first chap, cheaper option and won't hurt anyway.

[dr_broon]

O2 sensor fixed it for me, but mine only did it shortly after a warm start, or when there was lots of standing water on the road. 

[mokus]

Thank you.

A little update. Leads changed to new ones, but it was still bad, especially when warm.

My friend changed the rotor, he said it looks better now. Tomorrow I gonna go there and check.

Next step is coil change, maybe ignition control module change. Then if its still sucks, next will we o2 sensor.

Thats the plan

[dogg1210]

Check tps mines was misfire on very light throttle.  Needed adjustment just a little and it sorted problem 

[mokus]

Today it didnt started with warm engine. I drove there, it was there 1 hour already. Took apart the dizzy, nothing looks wrong. After two tries it started.

BUT the dizzy... its a f*ckin aftermarket sh*t*

Inner end of the shaft is like loosen, contol module not NEC... its a s**tty dizzy. Even the seal of the cap was a bit big for this dizzy...

but it has a TD-86U sticker on it.

I think all the problem is from this s**t :\

I told him to buy a complete oem one, Or rebuild my old spare one.