Low voltage to coil and idle stop solenoid.

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RoyBatty
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Joined: Sat Aug 28, 2010 11:44 pm
Your car is a: 1975 124 Spider - 1971 124 Sport Coupe
Location: Locust Grove, VA

Low voltage to coil and idle stop solenoid.

Post by RoyBatty »

I have posted this in the electrical section also, but don't want to miss a chance that an engine oriented member might have an answer to this.

These two items have been accompanied by a relay on the drivers fender that is buzzing.

I found these three things because the engine has become reluctant to start.
Usually on the third attempt with a 15 second crank it will then light off and all is well.
The buzzing relay is the second one back that is mounted closest to the body.
A voltage check with the switch in the start and run positions shows that voltage is just under 5 volts until I can get the engine to run. Then just before it lights off, the voltage suddenly jumps up to 13 and the engine starts.
I believe the noisy relay is the one labeled as the ignition mode/idle stop solenoid relay.
Since I got rid of the dual points and installed a pertronix module, I thought this should bypass the ignition mode relay.
Anyone have this happen before?
Thanks.

EDIT:
I was thinking right after I submitted this post that I should probably look at the connections on the back of the ignition switch................................
Black wire disconnected! Not sure which terminal.
But with it connected no noise from the relay and the engine lights off as soon as I hit start.
With that wire disconnected, yes I pulled it back off as a test, I get all the above mentioned symptoms!
Hooraaaaay for meee. ;)
Sorry to bore you all.
bobbycook

Re: Low voltage to coil and idle stop solenoid.

Post by bobbycook »

Black wire is usually the ground..Obviously....that was the reaon for the low volltagel.

Bobby
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