Web
Analytics Made Easy - Statcounter
distributor cap/rotor question - Engine/Ancilliaries - The Lotus Forums - Official Lotus Community Partner Jump to content


IGNORED

distributor cap/rotor question


simon a-b

Recommended Posts

Hi, 

I have had an ignition fail. Driving happily along, good response, everything happy and well in the world. 

Then a couple of pops/stutters, a minute of more running, then dead. No spark at the plugs. 

 

I have a 9v coil, tested and good (checked resistance of both primary and secondary windings)

I don't have the resistant wire, I have a ballast resistor instead. Voltages checked- start circuit gets battery voltage (~13v), run circuit gets ~7v

I have lumenition. 

Bulb/pickup checked and operating. I did the test with a peice of thin carboard acting as the rotor vane thing cutting the beam. When I cut the beam I got a fat, healthy spark from the coil, down the main lead (arcing across to the cam cover to test). 

I have new spiral wound leads. 

Lumenition tested as well- bridging the blue and black wires at the three-pin connector also produces spark. Spark is good. So I don't think the 7v vs 9v is the issue- unless this is what changed, and I can't see how?

One question on the resistor- it's a ceramic block with a resistant wire protected by the ceramic. The wire glows red hot when it's running. The design holds it away from anything flammable so I think this is as standard, but I'd be interested if anyone thought this was a concern?

So the only conclusion I can come to is that the failure is somewhere between where the main lead enters the distributor cap and the plugs. No spark seen at any plug lead. 

Can a distributor cap or rotor arm fail like that? It seems to be the only answer.

The rotor arm is clean and good- I gave the end a light rub with fine grit sandpaper and the central button is clean. The pickups in the cap are clean too, I gave them a quick once-over as well. The cap looks to be undamaged. 

Will any Lucas 45D 4cylinder cap fit? Is there any difference between them? I've read of the blue cap vs the black cap- it's a S3 so no turbo. 

Thanks in advance (timing pun)

Simon

 

Link to comment
Share on other sites


Upgrade today to remove Google ads and support TLF.
  • Replies 1
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×
×
  • Create New...

Important Information

We use cookies to enhance your browsing experience, serve personalized ads or content, and analyze our traffic. By clicking " I Accept ", you consent to our use of cookies. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.