I am puzzled! what am i missing?

[hbryant123]

i Have a 1974 chrysler 105 hp. To start with i converted it to 12volt coil, changed the wires, plugs, and the coil is new and new points. I unhooked the timing belt and spend the distributer with the key on and all 4 plugs are firing. It has an even 120 psi over all the cylinders. I took the flywheel off and checked the key and its fine. But when i put it in time and turn it over it wont start occasionally it will hit or backfire. just for giggles i sprayed starting fluid in the cylinders and still nothing. This engine ran great last year. Any help is appreciated! ive been working on this motor for nearly a month!

 

[Frank Acampora]

Re: I am puzzled! what am i missing?

Did you change from surface gap plugs to bent electrode? Surface gap plugs are used with CD ignition and while they may fire in open air, when installed in the engine they may fire sporadically or not at all.

You can use a plug like the OMC QL77.

 

[hbryant123]

Re: I am puzzled! what am i missing?

Did you change from surface gap plugs to bent electrode? Surface gap plugs are used with CD ignition and while they may fire in open air, when installed in the engine they may fire sporadically or not at all.

You can use a plug like the OMC QL77.

I believe they are what u call bent electrode. They just have the one thing the fire jumps to. They look like the style used in about everything like cars and lawn mowers.