new 502 ramjet

[phijon]

why is the timing mark jumping all over about +or- 10 degrees

[sg4356]

more than likely it is your dist. is the dist. new or used. as you bring the rpm up does it stop moving around.

[pat mccarthy]

well i never played with the ram jet dist but that the first place to look sounds like no curve springs or the cam is walking ? or no thurst plate on the cam ?

[phijon]

pat being a new gm performance crate motor it would be my luck what would be the easist way to check the dist

[pat mccarthy]

take the cap off and the rotor there should be curve springs under the rotor ? if no cuve set up under the rotor a solid shaft then the it is doing all curve with a control box then it could be a bad box or bad ground ? or they did not put the cam hold down plate on the cam ? i had a boat engine about 17 years ago do something like this it it was bad spark plugs messing with the control box

[ted dehaan]

are you running the ramjet fuel inj. and dist. should be controlled by the e.c.m.....ted

[phijon]

thank's guys i got to thinking and the (i guess) distantance from the coil to the dist about 2ft using a reg sparkplug wire was the problem i got a coil wire remounted the coil and all's well