FC3S Murray

iTrader: (7)

Got your attention.

Good.

Here is the problem, I am experencing mad hesitations when boost is applied. I have regrounded the usual, have FCD, TPS good, Boost sensor good, blah, blah, blah. What the car does id at partial throttle when cruising the the car seems to accerlerate in stages.

not smooth at all but intermittent.
I don't think it is fuel since my wideband reads pretty stable reading; 14.4 to 14.1

Iginition maybe? Plugs are new, plug wires are new, checked coils= good. I couldn't perform the Coil check out procedure in the FSMsince I didn't have the mazda tool.

What would the symptoms be if coils are bad. I know that the leading fire individually and trailing fire simuntameously. So if the leading coil was bad would it still fire at normal cruising but once rpm increases with load would it have breakup?

Stumped and amrunning out of things to troubleshoot.

Reminder that I had this hesitation appear after running my fuel pump HOT. Tried the pump rewire but decided to go the hot route. Dont know if that would make difference.

Any help would be appeciated. Thanks?