| [ Total Views: 620 | Total Replies: 11 | Thread Id: 102800 ] |
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 charlie
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| posted on July 17th, 2013 at 06:29 PM |
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brosol 30/31 carby problem with idle solenoid
hi
i have a 62 beetle with a 1300 engine. i was told it was a 6 volt but it has a 12 volt battery? the problem is i just put a new brosol carb on it and
im only getting 8 volts at the cut off solenoid instead of 12, so the car wont idle. i have the solenoid wired to the hot side of the coil.
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AA003
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| posted on July 17th, 2013 at 06:39 PM |
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Is it on the + or 15 side of the coil?
Is it a standard coil or one with a resistor?
I read it on samba, so it must be correct.
Sometimes Volkswagen dealers sell spare parts. Amazing isn't it!
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charlie
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| posted on July 17th, 2013 at 06:59 PM |
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if your looking at the engine in the car, its on the right hand side, which has 9 volts when ignition is on, the other side has 0volts.
not sure about coil type, its silver with no name on it, maybe there is a resistor somewhere else dropping the volts for the 6 volt system?
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psimitar
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| posted on July 17th, 2013 at 08:28 PM |
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So the coil only has 9 volts? Or just the solenoid?
If only the solenoid then remove from the carb and use a test wire direct from the battery to the solenoid terminal and touch the solenoid body to a
chassis earth point. Does the solenoid pull back in properly and do you get 12v at the solenoid?
If all of this is OK then either the coil to solenoid wire is eating 3v or the carb earthing is a bit crap and the resisance this creates is eating
the voltage.
If neither of the solenoid tests work correctly then the solenoid is faulty.
madness is in the eye of the beholder  |
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charlie
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| posted on July 19th, 2013 at 05:29 PM |
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ok thanks
yeah i did wat you said and the solenoid worked, so i will look into the quality of the earthing. is there anywhere else in the engine bay i can get
12v from?
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psimitar
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| posted on July 19th, 2013 at 06:39 PM |
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Depends on your year of engine. If generator with regulator mounted on genny or fanshroud then 12v output there otherwise no.
Did you say you got 12v at the coil positive? If so then the engines/gearbox earthstrap is working well so points towards earthing issue with carb.
Twinport motor earth thru the centre manifold support bolt and singleport thru the cylinder heads. Try running an earth wire from the carb mounting
stud to an engine case bolt. See if you get full 12v then. If so you defo have a carb earthing issue.
madness is in the eye of the beholder |
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68AutoBug
A.k.a.: Lee Noonan
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| posted on July 19th, 2013 at 07:08 PM |
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| Quote: | Originally
posted by charlie
hi
i have a 62 beetle with a 1300 engine. i was told it was a 6 volt but it has a 12 volt battery? the problem is i just put a new brosol carb on it and
im only getting 8 volts at the cut off solenoid instead of 12, so the car wont idle. i have the solenoid wired to the hot side of the coil.
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Hi
Maybe all the power in the engine compartment is going thru a resistor?? so it will still work with 12 volts??
You must have a multimeter, so check out the power at the solenoid and put the other end of the lead to a screw in the tinware and the base of the
generator stand to get a good earth..
If its still the same..??? check if You still have the earth strap under the gearbox... gearbox to chassis... that is what earths the engine.. and
as suggested, run a heavy wire from the body to the engine...
If You find its still not 12 volts then there is a resistor somewhere ?? could be in the boot, behind the dashboard, or it could be near the battery
[if a relay is used] so You would need to run a wire from the other side of the resistor to that idle solenoid..
I don't know what the thread is on the carburetor for the idle solenoid, as You could screw a bolt into the hole so it idles, or attach a wire to the
tail lights, so you need to have the tail lights on to start the car, and drive it... lol
No One will steal that car... lol
Best of Luck
LEE
If You lived nearby I'd come and check it out..
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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modnrod
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| posted on July 20th, 2013 at 07:58 AM |
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| Quote: | Originally
posted by 68AutoBug
Hi
Maybe all the power in the engine compartment is going thru a resistor??
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Possibly.
It's called a 50 yr old bit of wire.........
I have seen people wire 6V Beetles with 12V to the starter and lights, but run everything else in the car off a resistor in front of the dash
though.
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 matberry
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| posted on July 20th, 2013 at 11:10 AM |
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My guess is you have a bad conection on power feed (big red wire) often the issue is where it loops off the back of the headlight switch, or at the
fuse box, or contact at or on the ignition. It's the black wire that then powers the coil so it then runs all the way back to the engine. You need to
track the circuit either from the coil to the ign sw to the fuse box to the headlight switch to the battery or the battery ---- to the coil and at
every junction/connection, find the voltage drop. Somewhere your loosing 4 volts, could even be the battery terminla or ground strap etc etc. There
won't be/unlikely a resistor droping voltage, and there is usually little wrong with 6 volt cables, they are actually thicker than 12 V hence more
capable of carrying current
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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psimitar
Son of Jim - Creator of Good
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| posted on July 20th, 2013 at 02:39 PM |
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Did you say you have 12v at the coil? If not then follow Matts advise. I was working off the idea that you had 12v at the coil.
madness is in the eye of the beholder |
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charlie
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| posted on July 22nd, 2013 at 06:46 PM |
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9 volts at the coil, how about running the solenoid off the + on the generator?? that looses it volts when the engine isnt running.
thanks for all the different advice.
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matberry
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| posted on July 22nd, 2013 at 06:53 PM |
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No good on gennie, that s un regulated voltage so will burn out the solinoid as it can see up to 17 volts. Fix the low voltage problem as it will only
get worse and the coil will provide better spark etc etc. The bad connection could at worse burn your car down !
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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