I purchased this sn95 a few months ago and it has been giving me problems ever since. Apparently my problem is coming from my 70mm BBK throttle body. Im being told to clean it or sand the blade or use a dremel or drill a hole...blah...blah..blah. How about i pull the sum***** off and slap a stocker back on there! Can i do that?
Mods:
Gt40 intake
Twisted Wedge heads
24 inj.- 255 fuel pump
aftermarket exhaust
and the damn EGR was deleted.
To answer your main question yes stock t-body is fine... Will it cure your surging idle IDK.
If you haven done a base idle reset that would be the first on the list..
http://sbftech.com/index.php/topic,1031.0.html
Second the PP t body is known for its poor quality that is why you've heard about sanding and drilling. Usually a burr on the casting or blade will let it hang up here and there.
Third verify you TPS is good and voltage is within spec.
Fourth make positively sure there's no vacuum leaks.
Fifth check MAF signal wiring resistance ...... Pin D on the MAF and pin 50 on the computer (dark blue/orange wire) should be less than 2 ohms. Pin C on the MAF and pin 9 on the computer (tan/light blue wire) should be less than 2 ohms
There should be a minimum of 10K ohms between either pin C or D on the MAF and ground
you can also try clocking the meter if your running a CIA, it sometimes helps.
sixth make sure your ECT and ACT sensors are aren't all gunked up. clean if needed
Seventh make sure you pcv is functioning properly.
If all fails break down and spend the money on a tune.