JUMPED TIMING????

[Jaino40]

I recently did the 248/248 exhaust cam setup in my 240sx and also advanced the timing 5 degrees.

Now the problem is that my car is misfiring..... and when i accelerate to 2500 rpm, it kind of hesitates a little then climbs back up. Also when i reach 3000 rpm, something from the motor makes a tin can like noise. Timing chain?? IDK I am confused. I use only 91 octane gas all the time. I've put Seafoam in my gas tank hoping to clean my injectors.

ANY help???

[Nskylinerb-25]

did you move your intake cam 4 teeth CCW. and I wouldn't advance the timing by doing the 248 on the intake you already put 1.7 advance timing on the intake I would put your timing back to 0.