Rev.LowBuck
Active member
Hey guys, I really need some help on this.
Recently installed a boneyard Duraspark 2 module and distributor in my 200. I blocked off the SCV port on my carb and am using manifold vacuum to the dizzy.
Crack the throttle just a bit and it DIES. No backfire, just bluh. Smack the throttle to the floor gets me the same thing.
Feather the throttle oh so very gently and it stumbles through til it revs.
Checked and double checked my timing marks for TDC.
Vacuum advance canister holds vacuum until I take my tongue off the line.
Good smooth idle with initial advance at 10-12 degrees.
Advancing the timing to ridiculous will mitigate the problem enough to get it down the driveway and onto the road but driving very gently it feels like the spark is laying down. No pinging but I can't get into hard enough to make it ping anyway.
12+ volts to the MSD Blaster 2 coil. Replaced the MSD with factory coil- no change.
Disconnected the white (spark retard) wire from the solenoid- no change.
Before installing the dizzy I did the "recurve mod" replacing the lighter spring with one from Mr Gasket 925D. Having read of trouble with this I put the original spring back in but no remedy. Then I replaced the heavy spring with the 925D, still nothin'.
So is it the ported vacuum?
Bad Module?
Something else?
I have a rudimentary timing light with no dial back and no tach.
Thanks in advance
Steve
Recently installed a boneyard Duraspark 2 module and distributor in my 200. I blocked off the SCV port on my carb and am using manifold vacuum to the dizzy.
Crack the throttle just a bit and it DIES. No backfire, just bluh. Smack the throttle to the floor gets me the same thing.
Feather the throttle oh so very gently and it stumbles through til it revs.
Checked and double checked my timing marks for TDC.
Vacuum advance canister holds vacuum until I take my tongue off the line.
Good smooth idle with initial advance at 10-12 degrees.
Advancing the timing to ridiculous will mitigate the problem enough to get it down the driveway and onto the road but driving very gently it feels like the spark is laying down. No pinging but I can't get into hard enough to make it ping anyway.
12+ volts to the MSD Blaster 2 coil. Replaced the MSD with factory coil- no change.
Disconnected the white (spark retard) wire from the solenoid- no change.
Before installing the dizzy I did the "recurve mod" replacing the lighter spring with one from Mr Gasket 925D. Having read of trouble with this I put the original spring back in but no remedy. Then I replaced the heavy spring with the 925D, still nothin'.
So is it the ported vacuum?
Bad Module?
Something else?
I have a rudimentary timing light with no dial back and no tach.
Thanks in advance
Steve