r33 (oil?) idle problem

[Fly_With_Sky]

On friday my r33 gts25t played up a little.

When i was driving up a hill, road conditions at the time made me take my foot off the accelerator and then i had to acclerate again. When doing this the car felt a little wierd when applying the gas. (speed was approx. 50km/h).

At the top of i hill i stopped in a little car park thing and the car was idling strangely indeed. It was searching for idle and couldnt quite get it right. The revs dropped to 200rpm and then the car stalled. During this the oil gauge dropped between the the 0 and the second bottom line (2). It has never gone so low before, and i have never had an idle problem.

I started her up again and gave it a little rev and she gave a little pop out the exhuast. The oil gauge was reading normal again and the car seemed ok once again. However, on the way home when having to stop at traffic lights i felt the idle to be strange again but it didnt fluctuate like the first time. Also, when applying a tiny amount of pressure to the accelerator the revs drop to 400rpm and then the car accelerated normally.

Got home and checked oil and everything was fine. A couple of hours later i took it out for another little drive and it seemed ok then after a little while the rpms dropped to 400 when taking off very slowly, then accelerates normally. Also on the way home i swear i saw the oil light go on when braking for an intersection then it was normal again.

This idle problem (or oil problem?) has never happened before in my two years of owning the car. Does anyone have any thoughts on what it may be?

Would it be the afm?? Will get it checked out if problem persists on tuesday or wednesday when i have time.

[Busky2k]

Sounds like you have an idle problem related to an intake leak or stuffed idle control valve or an AFM problem. Give the AFM a clean and check for leaks.

When the RPMs drop real low, like 400 and below, the oil pressure skydives and im not suprised if the gauge almost fell to zero. This is becaues the crank is spinning very slowly, so the oil pump is not pumping fast enough to replace the oil loss at the bearings hence, very low pressure indeed.

Btw you've checked your oil level yeah? (The oil light coming up during braking on the other hand is not a good sign ie next to no oil in the sump!... unless you have an auto and the revs dropped very low during this time and fits the explanation above)

[Fly_With_Sky]

yeah its an auto, didnt have any problem today when i took it for a quick drive. Very strange indeed...hopefully it was just a random occurance as oil level is on the H (high) mark.