Dwell meter

[Zacha]

I've tried to use three differents Dwell meters to check my carb -81. Can someone recommend one that you actually know will work? Since I live in Sweden, I would prefer if you can give me a link where I can buy it online (Ebay or a vendor).

I've been following this forum for a long time and your tips have helped me a lot to fix my ECM. I'm now fixing the last thing (the idle) on my E4ME. That's why I need a working Dwell meter.

 

[Peer81]

Hello Zacha,

I want to know how did you connect the dwell meter to the carb and where else? And what did the dwell needle do when you connected the dwell meter and when you accelerate or deccelerate?

Why I ask, as you may know I live in Holland and purchased a dwell meter second hand overhere, very old thing and it works just fine!

I would think when you have 3 dwell meters at least one should work.

Greetings Peter

 

[Zacha]

Hi Peer 81 you are one the guys in the forum that helpt me a lot just by reading yours post´s

Yes i did conect the meter correct, negativ to engineblock, positiv to green kabel (MC) near AC kompressor.
One off the meters showed 96.00 all time, second one effected the engine by rpm went upp 500 and noting on the meter. third meter showed 40.00 all time regardless off rpm hot or cold engine, that`s why a need help

 

[Peer81]

I see, very weird! And thanks for the compliment

I don't know how I can help you with this. The only thing I can think off is that with the small idle fuel holes I think the dwell meter will show a very lean condition even when you turn the idle screws out 1 or 2 times. But on the other hand, if you push the throttle, the carb should go into a rich condition that should show on the dwell meter.

If you're not in a hurry (or no other options arrive) I can always send you my dwell meter, if I get it back.

Greetings Peter

 

[Zacha]

I have found out that my TPS sensor is broken - it shows 4 volt att idle, plus i got code 21, even so i remember my third meter showed 50.00 not 40.00 all time which means that the M/C solenoid is in the rich mod all the time.
I have orderd a new TPS sensor that probably it's gonna fix, one off all mine problems, i think if i fix this one that will be my 200 hundred and it´s not the last one. :L

 

[Peer81]

The only thing I can think off (as I'm the closest one) you can send one or all dwell meters to me, I test them and send them back. Would be around 23 euro's. Or I can buy a dwell meter here, also test it and send it to you.
Quick search I found this one, almost the same as I have (also second hand) Marktplaats.nl > Contacthoek/dwellmeter - Motoren - Accessoires | Onderhoudsmiddelen

But with the second option, in the end you'll have 4 dwell meters! otfl

Greetings Peter

 

[Zacha]

Thank`s Peer 81

The meter you linked to me is the same i have ( the third one) and i will givit it a try again after i've changed my TPS sensor, hopefully it will work this time - if not i keep work until it will.

Thank`s again for all help i will say you and Sensei are the guys that have helped me a lot when it comes to EMC and E4ME, just by reading your comments.

 

[Peer81]

Keep us updated!

As for the dwell meter link. The meter is no problem but I think the connectors are to isolated (to much plastic around the contact points. Maybe better to get other ones with full steel ones. If you know what I mean

Greetings Peter

 

[Zacha]

The update.

I exchanged the TPS sensor and adjusted it to 0,50v and then setted the E4ME with help from my tools Thexton 362,370. after that i checked my EMC. guess what - no cod 21, BUT code 51 faulty prom in with the other prom i have laying around and now time for a test ride. everything OK, but i can't set the idle with the dwellmeter. it shows 50.00 all the time, but i tested and the M/S is working. what's wrong?

 

[Peer81]

A few things you can test.
First is the dwell needle cycling at 50 degrees or frozen at 50?
If I read correctly from 30 to 60 degrees the mixture is to lean so the solenoid is on the rich side (or in your case almost full rich).
You can always test this by screwing the mixture needles out until the dwell needle starts to go down. But much easier is instead of more fuel, less air.
What you can do is take off the aircleaner lid, with the engine running and you can see the dwell meter put your hand on top of the choke butterfly, try to figure out of the engine climbs to a higher rpm or not (indicated a better air/fuel mixture. Just let enough air in so the engine just keeps on running, after a few seconds you should see the dwell needle do down because the ECM > MC solenoid tries to correct the mixture.

If this still doesn't help and the dwell needle is fixed and not cycling the I don't know what the problem could be. But if your MC solenoid works just fine you could also look into the wiring diagram to see if the green test terminal is the same as the + wire that goes to the MC solenoid. If it's the same you could also see if you could get a reading from the + wire that goes to the MC solenoid... Maybe the problem is in your green test wire and not the solenoid. Just a thought.

Greetings Peter