Random missfire code

[badassgsx]

Ok guys so I got my car running finally
As I am driving everything is fine until I turn my ac on then I got a random missfire code
300 and my power unit is super hot don't know if that has anything to do with it what do you guys thing I have a 1g in a 2 g

 

[NHerron]

It's the con of swapping a 1G into a 2G bay. The 2G crank and cam signals are separate sensors and therefore higher resoluation than the 1G CAS combo. Any minute stretching of the Tbelt can cause a problem along with several other variables.

There is a few things to do, among them is buy the Kiggly crank sensor.
Kiggly Racing - kigglyracing.com

Or this list of stuff from RRE

================================================================
How do I get rid of the Random Misfire studded and check engine light?
================================================================

RM (Random Misfire)The ECU is flagging a misfire condition because the crank
sensor which originally drove the hyper accurate signal for the 2G ECU has now
been replaced and simulated by the not so accurate 1G CAS. The only remedies
for this symptom once you have it is:

1. Start over again and do it the original RRE way by modding the oil pump case
and keep the crank signal. RRE does not do it this way anymore, so why would
you?

2. Wire in a potentiometer on the barometric sensor wire going to the
ECU,thereby fooling the ECU into thinking you are at very high elevation (low
barometric pressure) so it doesn't check for RM. This sounds simple, but if you
don't tune the engine to compensate for the additional timing, you will end up
turning your piston's to goo which also kills your turbo. (Not a recommended
fix)

3. Cutting the TPS sensor wire. This actually appears to work for some
people,but since TPS is useful for data logging and tuning, its not a good long
term fix. This may also effect engine performance during times when the ECU uses rapid changes in throttle position.

Best:

4. Buying DSMLink and clicking a tiny little checkbox which basically disables
the ECU logic that checks for RM.

 

[badassgsx]

I do have link so just uncheck missfire dtc

 

[NHerron]

We need the staples button around here...
Good luck

 

[badassgsx]

What does that mean

 

[NHerron]

Ever heard the staples catch phrase? It goes "Staples, that was easy!" They sell a gag button you can hit and it will say "that was easy"

 

[badassgsx]

Never heard it but yeah I hope it's that easy