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Cendensor and Propane questions

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Cariboo4x4

08-10-2020 13:03:23




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1997 international v8 404 has no spark. It has a condensor mounted on coil. No points in distributor. Just a 8 lobe device and magnetic pick-up device. Is the condensor used with the updated device in distributor?

Also I unknowingly removed idle air fuel mixture screw out of top center of impco 300A propane device above carb. I read online you need a special guage or gas engine analyzer to set screw right. Im sure I could set it up close yet any tips?

Thank you

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Nordic

08-13-2020 22:43:44




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 Re: Cendensor and Propane questions in reply to Cariboo4x4, 08-10-2020 13:03:23  
If you do determine that coolant is getting into a cylinder (or more) before you tear off the heads remember that you have coolant circulating through the propane regulator as well just in case there is an internal leak in it.



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Cariboo4x4

08-11-2020 21:20:52




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 Re: Cendensor and Propane questions in reply to Cariboo4x4, 08-10-2020 13:03:23  
Oh yes thank you for tge Pertronix tip. I researched that. I believe the Pertronix 1484A ignitor will work on this truck. I assume once its all hooked up with present coil and an ignition wire to coil I can toss the Prestolite Ignition module (gold box) just not 100% sure yet sounds like it. Maybe someone here know for certain?



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Cariboo4x4

08-11-2020 21:15:29




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 Re: Cendensor and Propane questions in reply to Cariboo4x4, 08-10-2020 13:03:23  
Thank you guys. I found out the condensor on ground side of coil is for voltage spikes. The coil resistance tested well for primary test. Also secondary side good. I cleaned all connections. Then through more research found out how to tune propane idle mixture. If its adjusted to rich it wont start. I set screw 3 turns our and it finally started. I had a buddy keep rpms up to 2000 and adjusted mixture for sweet spot. Then I had him drop it a 100 rpm and again adjusted it to sweet spot. It would start to die if too lean and start to die if too rich. We kept doing that till it was at 500 rpm. So... so far so good. I am not very familiar with propane.

Then a weird thing happened. Engine sounded like it was missing on one of the 8 cylinders at idle. As I was putting truck in another area of yard it started puking white smoke or steam. It just happened for a few seconds and then went away completely. It did not smell like coolant being exhausted. I blew a head gasket on a gm 350 last summer and could totally tell white smoke/steam reeked of cooked coolant. I was thinking the cylinder that wasnt firing started firing and excess propane and possible moisture in that cylinder became cooked up. I couldnt find any evidence on net of propane burning white. After engine cooled down, engine oil was clean and slightly black (normal) and coolant was still up to normal level. I figure pull plugs and check for a really clean plug or coolant in cylinder. Ill crank it over with all plug out too see if coolant spews out. If that checks out, start it and pull one wire off at a time to see which cylinder is not firing. Then check plug wire resistance and\or test sparkplug.

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Duner Wi

08-11-2020 19:43:57




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 Re: Cendensor and Propane questions in reply to Cariboo4x4, 08-10-2020 13:03:23  
You might have ignition module problems as to the no start.

This might be a possible solution for a 1977 model.

https://loadstarparts.com/Pertronix_MV_404_392_Engines/p17699



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John Saeli

08-11-2020 08:14:14




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 Re: Cendensor and Propane questions in reply to Cariboo4x4, 08-10-2020 13:03:23  
I can't help w/ the propane, but I think that "condenser" on the coil is a radio noise suppresser. Do you know how to check a coil?



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