Weird possible timing issue - 20det

[smart_garrett]

Hello,

So at my last track day a couple weeks ago everything was going fine but after a couple sessions all of a sudden when i was pulling into the paddock, my car would not idle at all and had horrible misses below 2k rpm. Everywhere else in the rev range it ran fine an did not break up. Now I've done some testing so I went with the simple stuff first: plugs gapped right, r8 coils(deletes the ignitor). That did nothing. So then i replaced my coolant temp sensor and checked tps voltage, that fixed the idle issue. So I went to check my timing. With the light the first time i checked the marks were so far past advanced that it would have been blown up by now, so I was confused and shut the car off to have a drink. Came back and started it up again to look and now it was a little past the last mark at 30* degrees and was able to get it to 20, with the cas retarded almost all the way it allowed me too. I then went for a test drive and the car ran fine but when pulling it out of the driveway it died. I pulled it in to check the timing and it was the same at 20*. So i went to drive again and got out on the road and got on it, it reved up fine and built boost with no missing, but felt like it had legitimately zero power, and off throttle it gurgled a bit. I replaced my cas and that changed nothing. I'm stumbled at this point. Any pointers??

Thanks for any help. 

[GTSBoy]

Check for a slipped crank pulley. The timing marks could be telling you lies.#1 plug out and screwdriver down the hole looking for TDC would be the first step there.

Remember that an RB20 has a switch in the TPS for idle. It doesn't rely on the ~0.45v that the 25s do.

Otherwise, your weird issue is weird and will always be something unexpected!