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Re: Adjusting timing propane engine and impco 425 mixers
Posted: Fri Dec 07, 2018 4:18 pm
by storm
Caddy123 wrote: ↑Fri Dec 07, 2018 3:43 pm
Ok last question.
1 mixer doos not respond on the idle screw (2000 miles on it) only if i screw it in far.
Ps mixer 2 is new! Respond perfect.
Or do i have a vaccuum leak?
2 things come to mind
1. Idle diaphragm may be faulty (hole in it?)
2. Do you have a separate regulator/converter for each mixer? If yes swap them over and see if the difficult idle setting changes to the other mixer.
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Fri Dec 07, 2018 5:43 pm
by Caddy123
Test
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Fri Dec 07, 2018 6:05 pm
by Caddy123
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Fri Dec 07, 2018 6:23 pm
by storm
There is a size (how many Megabytes) limit on attachments. If your test didn't work it may be because you are trying to attach a file that is to large.
I just did a test and 2MB seems to be the limit, anything over that and it won't even try.
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Sat Dec 08, 2018 2:03 am
by Caddy123
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Sat Dec 08, 2018 2:59 am
by storm
Nice plenum. You have 2 Impco E regulators, from my understanding they are better off being mounted with the vapour hose at the bottom.
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Sat Dec 08, 2018 5:23 am
by Caddy123
Jes there impco E regulators.
I know there upside down.
This was better for the vapor hose.
I drive 3000 miles a year in the summer.
I can reach them easy so i can clean and check them on the( i think) 10000 miles.
Screw the top of and go
So the rest of the evaporator can stay on plase
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Sat Dec 08, 2018 1:16 pm
by storm
Have you swapped the regulators (or mixers) around to see if the idle tuning problem switches to the other mixer?
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Sat Dec 08, 2018 2:32 pm
by Caddy123
No i have a little vaccuum problem.
The mixer that not respond have a gasket leak.
My mate have welded the plenium but i have not check for straightness so i must take it appart and milling it.
Next week.
If its ready you hear.
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Tue Dec 11, 2018 9:19 am
by Caddy123
Is this a good afr reader for my set up (i like the$)
From edelbrock only it measures with 0.5 v and not 0.1v.
there expencive.
https://www.amazon.com/Edelbrock-6593-F ... B00062YBES
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Tue Dec 11, 2018 10:21 am
by storm
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Tue Dec 11, 2018 2:09 pm
by Steptoe
I use an inovate, older model.
The vapour hose go to the bottoms as LPG is not clean.. has oils/wax and such in it.
With hose at the bottom, these flow thru and drop out.. at the top or side collect very quickly inbehind the diapham.
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Wed Dec 12, 2018 1:20 am
by Caddy123
Thanks for the input.
I turn the regulators and buy a good afr.
Gr Danny
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Wed Dec 12, 2018 1:41 am
by Steptoe
If it just points downwards.. does not need top be actually pointed down all the way.
Just enough , so the wax cant accumulate.
I put near on 200,000 miles near vertical and had a little build up in the cnr at the bottom.. not enough to effect anything.
If built up, clean out with kerosene and a paint brush.. if bad may need a bit of a soak.
Re: Adjusting timing propane engine and impco 425 mixers
Posted: Wed Dec 12, 2018 2:13 pm
by Caddy123
Ok thanks steptoe i check them
