Digitalair

I've had my S2000 for over a year now. Long story short I've kept it pretty much stock to learn the balance of the car and grow with it as a driver. I've done several HPDE events and lots of autocrossing...long story short I let my friend drive the car after he let me drive his M4, he shifted from fifth to second gear on accident coming off of the freeway and I got a flashing check engine light. I got the car towed to my car and when I pulled the codes I got; P0300, P0301, P0303, P0304, P1399...what should I do? It's a MY2002 AP1 S2000 with a 171,xxx miles on it. Bone stock except for a high flow cat. What do I do? Please help.

windhund116

Well, for starters... I'd do a compression test and check your valve clearances. May want to inspect the valve train (including valve stem retainers).

Good luck!

Digitalair

Will do that tomorrow. I've done my own valve adjustments so I'll be sure to check to see if the valves have receded into the cylinder. What about the flashing CEL?

windhund116

Check the spark plugs, too. Your OBD reader have a "clear codes" option?

Digitalair

Yes it does. I have an OBD to USB cable and use EasyOBDII. What should I look for when I check the plugs? Should I clear the codes after checking the plugs and clearances?

windhund116

Just see if the plugs need replacing. Could have a lot of miles on them. If compression, valve clearance, retainers, and spark plugs check out okay --- try cleaning codes and see what happens. Hopefully, they go away. If they come back --- more diagnosis would be needed.

Good luck!

starchland

What was the road speed?

Digitalair

Plugs are roughly 15k miles old and they were gapped and torqued when I replaced them. What should they look like? I'm thinking of replacing the coils and adjusting the valve lash after doing a compression and leak down test. What could be the worst case scenario here?

Digitalair

Around 75mph. He instantly kicked the clutch as soon as he realised he ****ed up but there is no denying that the engine was mechacally overeved.

starchland

Yeah so I think that puts you into go find your buddies credit card territory