360 Chrysler running like crap cont...

[Fastjeff]

Sorry. Problems that mysteriously disappear always return.

Jeff

[bill]

So far pulled port carb, turned upside down in to a shallow pan and dumped all the fuel from the carb. Put dumped fuel in glass jar and let it set for a couple hours. Nothing showed but pure gasoline. Next disconnected vent at tanks and blew thru to overboard vent. No blockage not even a spider carcass.
Just for the heck of it I pulled the caps and looked under them no water, no arcking or corrosion.
Moving on to the 12 volt system. I put a voltage tester on the + side of the coil, when the key is in the run position I have 8.5 volts. Watching the meter while starting, the voltage drops to 5 volts. I thought I was supposed to see 12 volts or what ever is available from the battery while cracking. This is were I am stand today..
bill

ps Making plans on taking boat out for a long run with Ron Spies manning the test equipment.

[bill]

Started and ran the boat motors at the dock for two hours, letting everything warm up. I went in to finish breakfast and when I came back to the boat the port motor had stopped and would not restart. I put a spark tester on number two plug and found no spark while cracking. I was getting 12 volt at coil while cranking. So I figured it must be a bad coil. Just bought a new Wells C819 coil and installed to replace bad coil. Started back up and ran for about a half hour. Stalled again and same thing no spark. Decided to change ICM .(ignition control module aka transistorized ignition box) After the change it started right back up. Let it run for about a 1/2 hour.
So far so good. Decided to take it out for a hard run for about 2 hours at 2800 rpms. Ron Spied has volunteered to go with me to the Detroit Freedom Fireworks. He is also going to pick up two new Wells ICM CR114 from Auto zone for me and I will install be for the trip up the river. Hope to finally put this to rest.
bill

[ericinga]

Remind Ron to bring his Snap-on engine analyzer / ignition system tester. It simplifies the ignition diagnosis.

[Fastjeff]

Keep your eye on the ballast resistor connections. The stock spade connector can loosen and cause all kinds of trouble. I replaced them with NAPA units that bolt the wires on.

Jeff

[bill]

Thanks for the ballast resistor information. Jeff I did buy two new transistorized ignition modules from Auto Zone made by Wells CR109
( Thanks Ron Spies) and they only have 4 pins, so I do not need the ballast resistor that feed the missing pin. Only the one for the coil. My spade connectors are all very tight. But it is on my bucket list to replace those dual risters with the single ones.. One more piece of the equation put to rest.
Tomorrow its off to the Detroit Freedom Fireworks show on the river for a good shake down cruise.
bill

[Fastjeff]

Uh-oh! May have spotted a problem.

As I read your post, you are running the Chrysler ignition modules. If so, the modules MUST use a resistor, regardless of how many pins it has. The module was NOT designed to run on a straight 12 volts and will eventually fry itself. (Guess how I found THAT out!)

A word on the 4 vs. 5 pin ECMs (ignition modules); Being super anal, Chrysler engineers set them up to run on two voltages, approximately 9 volts AND approximately 6 volts. That 5th pin in the module--and the second path through the ballast resistor--was for that 6 volt circuit. It was totally unnecessary and eliminate in CARS and trucks in later models.

Jeff

[tundrarules]

Hope Bill made it back.

[bill]

Well ...... About half way up to the fireworks mr. starboard decided to sputter out and stall. Boat full of people so we continued on with the port engine only. Got up there and anchored.Thanks Ron and Art. Did some simple checks but found nothing. Watched the fireworks which were amazing. After show ended I started up both engines. Pulled anchor. Again thanks Ron and Art. and headed home @ 1800 rpms. Got into the Livingstone channel and decided to try to give it some gas. Starboard would not get above 2500 rpm at full throttle. Decided to slow back down and continue at the 1800 rpm till we got home. Ron suggested taking exhaust houses off and checking for delamination inside. Pulled all the hoses off, back to the muffler, when I pulled the muffler off I found the baffles inside had deteriorated and were hanging down. I took a razor knife and removed the baffles, Installed the exhaust hoses and muffler. Started up the engine and there was no noticeable noise increase. I did the same procedure on the pot engine Ron and I are taking the boat out tuesday for a long ride. I ordered two exhaust flappers for the out side exhaust ports, don't need any hydro locking.

Jeff, I installed the new Wells CR109 4 pin ignition modules using the dual ballast resistors. The four pin module does not use the ballast resister. The wire from the ballast resister going to the 4 pin module goes to the missing pin on the nodule.

bill

[bill]

Hope Bill made it back.

Thanks for caring. made it back slowly but surely.