Car Idles - but won't rev up

trwebb26 · Post by **trwebb26** » Tue Jun 06, 2006 8:45 am

I've got a stock 78' Datsun 280z with MS&SE running 3.0 hardware & 3.0 bar map sensor. I'm running the 83' turbo dizzy and 240sx tb. I'm running the aeromotive FPR with idle (800rpm & 38kPa) at 36psi. Stock 19 lb injectors.

The car idles great... but when I step on the go-pedal it gets up to ~2500 rpm and really sputters, coughs, backfires, etc. What could cause it? Thanks!

trwebb26 · Post by **trwebb26** » Tue Jun 06, 2006 6:21 pm

I FIXED IT!!! I had to set the dwell to fixed (minimal) to get the MSD to work. But now I've got another problem. Megasquirt isn't controlling the timing. Changes in trigger angle don't affect the timing at all. Any ideas?

elturbonitroso · Post by **elturbonitroso** » Tue Jun 06, 2006 6:45 pm

i have the same problem you said that you fix the problen to change the dwell to fix minimal to hei 4pin.

jsmcortina · Post by **jsmcortina** » Wed Jun 07, 2006 1:44 am

Sounds like you are triggering off the wrong "edge" of the output signal, if you have wired it normally you need "inverted" spark output. Plus the normal dwell setting for MSD is 50% duty.

James

elturbonitroso · Post by **elturbonitroso** » Wed Jun 07, 2006 2:54 am

hi james i have the same problem and im using a 4 pin module and i put the 470 ohms across b and c or i have to put the 1k because i have the problem when i try to rev the car in like 2300 rpm the car dies.