Strange bogging and power gain???

[projectsleeperwoo]

Ok I've been having this weird problem with my leganza, first off I'll start with what I know.. The car is a 97 leganza with the 1.8l d-tech dohc Korean spec, 5 speed, new cat, new spark plugs, freshly cleaned throttle body, new tb gasket, problems were before all of the new stuff and the tb cleaning. I also did the air filter box mod where you remove the lower part of the box. The engine has a bit of blowby(pressure in the valve cover when I open the oil fill cap). When the car is idling and I hit the throttle WOT the rpms instantly drop, there is a pause, then start to rise quickly so I guess you could say a little "lag", then when I'm driving if I ease into the trottle it will accelerate kinda slowly up to about 4k rpms then it acts like I hit a nitrous button or something all the way up to about 6k to 6300 when I shift, then it does it all over again. It almost seams like it has V-tech or something. Also tonight I was on my way home driving up a hill in 2nd gear at about 1k rpm and I hit WOT and of course it bogged then slowly rose in rpm to around 4k then it immediately started making power and I had some crazy torque steer that almost made me go off the road... I have searched the internet and cant find anything like this and have never heard of these symptoms before. Alos when the car is idling every once in a while you can feel a bump in the steering wheel like a slight missfire but the tach never moves.

I know this is a lot to read and any help would be greatly appreciated...

thanks
-Justin

[benzino]

Could it be the computer not going into closed loop properly at WOT? That might be the tps?

[benzino]

so it's wot and leaning out and then closed loop kicks in and dumps a load of fuel in and matches the air coming in. Maybe? Lol

[projectsleeperwoo]

I'll check the tps... yea its very strange. also there is no smoke white, blue, or black comming from the exhaust at idle or any rpm with or without a load. Also its not throwing a check engine light.

[Daniel]

If you have the VGIS system than additional air ports are opened around 4k rpm giving you extra "kick".

VGIS-1 (600 x 406).jpg

Look at video
http://img688.imageshack.us/img688/4916/vgismovie.mp4 .

[projectsleeperwoo]

well I wish it was that simple but my engine deffently dosent have a VGIS

[projectsleeperwoo]

1 of two videos I made tonight showing the bog from idle. you can see that when I bring the idle up to around 2k then wot it responds right away but from a normal idle (about 900 rpms) there is a lag.
http://www.youtube.com/watch?v=VBBzQ-zTyR0&hd=1

second video took while driving every acceleration was wot, and no I don't drive the piss out of the car all the time. I also included a couple of segments of the system playing.

http://www.youtube.com/watch?v=z-5JjMxubao&hd=1