SRSmith

After fixing the MAF problem, my sr20 was running great.

Some time later, I noticed that the car "hiccupped" when it hit around 4000 rpm when accelerating. I thought it was probably my restrictive china filter, or that the car still needed the timing dialed in with a test light.

I bought a K&N and installed it. To do so I had to disconect the hot side of the intercooler piping for some modifications. I didn't start it that night.

Unfortunately it rained and I didnt have a hood on, but i didnt find any water in the intake. When I went to start it, it ran just fine for 4 minutes, and then it started running real rough. The ECU said it was a knock sensor.

I bought a new knock sensor, and it no longer threw the code. It still ran rough.

So I checked the timing with a light and its fine. I also intalled a wideband. The reading is good for the first 4 minutes after starting, but then it runs rough and the afr reads lean.

I swaped back in the old filter: still no change.

Here is a video:
https://drive.google.com/open?id=11R...JCQje7W0HD0LWf
Thanks in advance