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[ADEN]

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[ADEN]

Your recipe please?...

[ADEN]

I have the same noise after my diy attempt to service my m20 new bearings, rings, new sleeves and used pistons and rods my mech told me it is probably a piston pin out of specs (noise is coming from piston...

[ADEN]

I burned valves trying to tune leaner, My exhuast was poping pulsing till it lost power.
lesson learned....

[ADEN]

Check post #35....

[ADEN]

If you tested the pump (jumped) as mentioned and the pump is working but it is not working when cranking then suspect your crank sensor not sending a good signal....

[ADEN]

A lot af things will cause your issue most of them are tuning related. Are sure it is tuned good in the idle area?

M20s like idling on the rich side, Tune idle till your engine sound hap...

[ADEN]

If you have a MAP sensor then it's probably shot anything in the 5V circuit might be damaged.

[ADEN]

Forget about the O2, Is the car running,idling and free revving smoothly?

[ADEN]

Thanks alot man that's a good option....

[ADEN]

What is your charging voltage at idle?

[ADEN]

Thank you i will look for wasted spark coils with internal igniters since no IGBT source found....

[ADEN]

Are you running wasted spark?...

[ADEN]

Please give me your thoughts, I know i should have attached my tune file but currently i'm out of town....

[ADEN]

You are right, Maybe distributor limitation is the cause of this.

Please if someone succeeded to get the pops with the stock distributor please let me know i will be appreciated....