Hey all,

A few weeks ago I started the car and it was really shakey, knew something was off. After about 5 minutes started hearing a noise, its hard to describe but can't hear it in Neutral, just in drive and after 2k rpm, when I accelerate gets louder. Its not a constant noise, pops are louder and some are not as loud and definitely gets louder the higher the rpms. If I shift to neutral can't really hear it.

Got home and plugged the nanocom, had a lot of misfires, at idle would just go up and up. Had errors p1300, p305 and p300. Checked the spark plug which I had changed earlier this year and looked fine. Changed the coil wire for that one cyl (cyl 5). Started the car and there were no misfires at all in idle on the nanocom. Still felt a little shakey and looking at the roughness tab on the nanocom cyl 5 still constant 2/3/4/5 while others are at zero and once in a while shows 1 or 2. Nothing on the misfire tab. Took it for a drive around the block, at first no further misfires seemed fine however the noise was still there, only in drive if I switch to neutral I can't hear it. Noise definitely concerns me. I also got the car to misfire again, had a few misfires on 5 again, way less and iddle again no more misfires.

I plan on changing all the spark plugs and wires but any advice on what this noise might be? I need to go take a video of it and wish I could hear it in neutral but only while driving around. Could it be the cats?

Thank you all!

Have had the p38 for a year now, has been wonderful.
Last week I noticed that after parking and engine cooling down a bit and back on it would slightly shake at idle for 10 seconds then go away. It has been driving fine after that. Also last week got a misfire on cyl 5 (p305 code), the service engine light was on. I cleared the code and has not popped up again (been about 200 miles). It also has been ticking only when warm, it sounds fine when cold and then will start a tick. I got the stethoscope out and its on the right side of the engine but can be heard almost louder on the right side tire well and under the car. Anywhere I put the stethoscope on the right side can be heard. Read the codes today and the p305 was not there but now have a p300 which I know is multiple misfires. I also took it for a drive with the nanocom plugged and it would throw misfires of cyl 5 (but the service engine light has not turned on and when I read codes with the nanocom it shows none)

I have read everything I could on the internet and a lot of cracked block/slipped liner. I want to figure this out myself and see if maybe its not something else because I go into catastrophe mode. Plugs, wires and coils have been done in the past 10-20k miles by the previews owner. Head Gaskets were done about 50k miles ago.

Video of the tick - https://imgur.com/a/p38-tap-I1WRgts

Thank you!