Sr20 bog during launch and smoke at idle.

[thang nguyen]

Hey guys, I just realized a problem with my engine a few weeks ago and can't seem to figure out.

1) Car bogs hard during stand still launch at any RPM....If I drop the clutch and launch hard the car just jerks crazy and RPM fluctuate drastically until I let off gas pedal and it stops and gradually add more throttle.

2) very rough idle with white smoke.....at a stop, sometimes RPM is somewhat steddy and sometimes it would fluctuate from 1K to 2K and hold, once it drops to 1K a puff of smoke exits and then it goes back to 2K for like 10 sec. The smoke looks white.

3) shake while off gas while in gear rolling....I was driving home from and while still in 5th gear i let off the gas to slowly decelerate without brake pedal, and the car seems to jerk back and forth as if the gas pedal was pressed. It does this in every gear.

Note: car is stock. Engine is stock with exception of BOV and Exhaust. Checked vacumn, and is right and tight. a little bit of coolant seem to leak behind the water pump pulley and no visible oil leak.

If any one has had these problems or know how to solve please help me. Thanks.

[dcmxsa]

Check your MAF and TPS

[da40]

i second that

[S13240]

How's the fuel filter and try clutch adjustment.

[thang nguyen]

everything looks okay. Clutch is fine, engages and dissengare smoothly but just cannot launch for some odd reason. fuel filter is new since swap, and gas tank was completely emptied and 93 octane gas use religiousy. Maf and TPS seems fine because normal driving is smooth.