Recently built a b20v type r style pistons skunk2 valve train. I drove the car for around 200 miles and only died on me once had no other problems. Got it tuned and had to get temp 9 ngk 5238 spark plugs and torco accelerator because my engine was pinging. Car got tuned ran great. About a week later I blow vacuum seals on intake manifold car dies will not start. Plug it back up and starts up eventually. Now the car sputters at 4 or 5000 rpm but than picks back up. Car than dies when I come to a stop sometimes not right away idles fine than just turns off. And I replaced cap and rotor with orieley parts recently, cleaned iacv. Haven't changed fuel filter in about a year. No error codes tuned on s300. Please help. Would it be injecters? I bought used 440 rc. Fuel filter? Have walboro 255. Fuel pressure at around 50psi.

 

so is it tuned on these 440's and on 50 psi?


I would roll back to your tuner and have him datalog it

 

Yes tuned on 440 and the 50 psi

 

what cams?

having to run ngk 9's and octane booster on an rs machine "itr" piston sounds like you have **** tune.

i had a similar build using the "itr" pistons, gsr head, skunk2 pro 2's and i had ZERO pinging...

 

Using s2 pro 1 compression is around 12

 

Bad gas maybe? Like I said, time to see your tuner so he can see whats going on.

We/You can sit here and take stabs in the dark, but hooking up a laptop will be the most accurate and quickest to pin point the issues.

 

Ya going to change fuel filter, cap and rotor, check spark plug gap, because they never tapped them I believe. And if that doesn't work burn off this gas I got and see how that goes. Will give my tuner a call before hand. I have dataloged this, any suggestion ob what to look for. I am pretty new to using my s300

 

Ya going to change fuel filter, cap and rotor, check spark plug gap, because they never tapped them I believe. And if that doesn't work burn off this gas I got and see how that goes. Will give my tuner a call before hand. I have dataloged this, any suggestion ob what to look for. I am pretty new to using my s300

 

Ya going to change fuel filter, cap and rotor, check spark plug gap, because they never tapped them I believe. And if that doesn't work burn off this gas I got and see how that goes. Will give my tuner a call before hand. I have dataloged this, any suggestion ob what to look for. I am pretty new to using my s300

 

Ya going to change fuel filter, cap and rotor, check spark plug gap, because they never tapped them I believe. And if that doesn't work burn off this gas I got and see how that goes. Will give my tuner a call before hand. I have dataloged this, any suggestion ob what to look for. I am pretty new to using my s300