118 - Ignition Timing on a Classic Fiat 500

In this video we show how to set the ignition timing on a Classic Fiat 500 F. We explain how to set up the distributor, how to check for top dead centre on cylinder 1, and how to adjust the timing using a timing gun and the distributor.

[@antonyrawson9231]

Great video that makes a lot of sense I thought the timing needed to be at 10° idling. My engine is a fiat 126. When I set that it was really rough and cutting out, but it is probably about 27° running perfect perfect by ear thank you really appreciate the video.

[@the500workshop]

Thanks - glad it helped

[@giacomoorru3420]

I have the same problem as this guy. I changed the fuel pump, the points and the condenser, coil, adjusted the valve clearance, I cleaned the carburetor and I also cleaned the fuel tank. At first it seemed to be working fine, then not anymore. As it warms up the engine loses power and then it turns off and does not start again. I have to wait for it to cool down a bit to start again. Advice is welcome. Best regards from Italy

[@the500workshop]

Have you checked out my reply to the other markbuck4? When it's hot and not running, pull out a spark plug, or use a spare one and connect it to the HT lead for one of the cylinders. Ground the plug on part of the engine e.g. the engine mount, and get someone to turn the engine over. You are looking for a good spark. If you don't have one on one or both HT leads, then you know it's likely to be either the points, the condenser, or the coil (most likely the latter two). If you have a good spark, then it is likely fuel-related. Take the fuel hose off the carb, put it into a jar or some other container, and turn the car over to check the fuel pump is working. If that is working then the carb needs investigation - it could be an air leak or a blocked jet. Happy for you to contact me on Instagram or Facebook Messenger (The 500 Workshop) if you need more help/advice.

[@giacomoorru3420]

@@the500workshop Thanks for the advice, however I don't even think that the engine is seized because I had done the cylinder compression test. I had the carburetor serviced and cleaned to perfection. It doesn't seem like a fuel problem to me because it seems like the gasoline doesn't ignite well. it starts to lose power with a metallic noise and then shuts off. I have to wait for it to cool down and then it starts again. I thought it was the capacitor of the points which, as it heats up, no longer does its job and makes the points spark. I will try all your suggestions little by little. You now have a new subscriber

[@lolalarik7048]

Great explanation, thank you! Do you plan on making videos regarding the replacement of the traditional ignition with an electronic ignition kit?

[@the500workshop]

Hey - not specifically, as I have already done this job on my 500's, so unfortunately it's not in my current to do list. It may depend on which electronic ignition you buy, but ultimately the electronic ignition needs a positive feed and a ground (-'ve). These are usually, and easily, taken from the coil (+'ve to +'ve and -'ve to -'ve). Once you have done that, the set up in this video can be followed in terms of setting the timing, etc - it should be that easy :)

[@roystonsimon311]

I’m keen on your 3D-CAD timing plate. Have you considered making a few of them and selling them to us ? Roysters 😎

[@davemitchell3833]

Hi, would you know where I should look for my classic 500 F vin plate, regards D Mitchell

[@the500workshop]

Sure .... It should be under the front bonnet, to the left on the firewall, behind the fuel tank

[@davemitchell3833]

@@the500workshop Many thank.

[@davemitchell3833]

@@the500workshop many thanks.

[@markbuck4]

Hi just quick bit of information i have fiat 500l 1969 running fiat126 engine been rebuild and balance (lightened flywheel crank and rods etc) new carb 28 weber 123 ignition plugs leads coil fuel pump the problem i am having is the car will start no problem but drive it out anytime of the year will drive 4-5miles Will overheat ,(boot lid and engine you can't touch due very hot) either cut out will not start till cooled down 5-10 minutes or run very hot will not cut out but will not start if switch off the fan belt is running the fan and the thermostat opening timing and tappets adjust correctly??? Any advice would be greatful cheers mark ps the alternator running 14,v to battery

[@the500workshop]

There are two things the engine needs to run - fuel and spark. If I was trying to investigate I would get a spare spark plug and when it’s too hot to start I would pull the HT leads in turn and plug them into the spare plug and get someone to try and start the engine whilst I held the spark plug somewhere on the engine (to ground it) … you are trying to check for a spark. The likely cause is either the distributor or coil is overheating - probably the coil. If you have spark, it might be that you have fuel evaporation, or the fuel pump is failing when hot. Do you have all the tinwear present, including the exhaust plate and the under engine plate? Often when people swap out the engine they leave these out and they are fundamental parts of the cooling system. If you need to chat more, might be worth finding me on FB Messenger (The 500 Workshop)