Help!! engine doesn't fire up anymore

Gotta love that wiring . . .
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Ravq124
Posts: 9
Joined: Wed Sep 20, 2017 3:34 am
Your car is a: 1978 fiat 124 spider

Help!! engine doesn't fire up anymore

Post by Ravq124 »

Hello again
I have a '78 1800 with a '79 distributor. It was working perfectly up until two days ago. I changed the spark plugs, spark plug wires to performance wires, rotor, distributor cap, magnetic pick up, performance ignition control module, starter, ignition switch and added the ignition relays. At first start it all started up perfectly with the exception of a loud clanging noisy coming from the distributor. I opened it up to find the rotor was banging into one of the ignition posts and bent the post as well as the metal tab on top the rotor. I replaced those with the old ones and it started up again, a miss fire here and there but nothing dramatic, as I drove around I noticed the gas pedal felt a bit difficult but still drove nicely. after an entire day of driving off and on I went to work in the evening and when I came out, the car refused to start. No matter how long I crank the engine for, the car would not fire up. I once again changed the ignition module to a new one that's not performance as well as the ignition coil.
I tested the spark plugs and there was a small spark, then nothing after that. I read on another post about the choke sometimes getting stuck open but the choke was just about closed so I don't know what else it can be. I rechecked the rotor and cap again and noticed a lot of little shavings on the magnet and the bottom of the distributor, I cleaned that up and put the old spark plug wires on it again. I tried cranking it and after a while it showed a sign of wanting to ignite. after several min of trying again and again, it would only show sign of combustion once or twice before just cranking.
Any and every piece of advice to solving this conundrum would be greatly appreciated. thank you very much.
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kmead
Posts: 1069
Joined: Sat Aug 02, 2008 9:24 pm
Your car is a: 1969 850 SC 1970 124 SC 85 X19
Location: Grand Rapids, MI

Re: Help!! engine doesn't fire up anymore

Post by kmead »

As you have a electronic ignition system, have you replaced the sensor and attached cable in the distributor to the electronic module?
Karl

1969 Fiat 850 Sports Coupe
1970 Fiat 124 Sports Coupe
1985 Bertone X1/9
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spidernut
Posts: 1906
Joined: Wed Jan 25, 2006 12:20 am
Your car is a: 1979 Fiat Spider Automatic
Location: Lincoln, CA

Re: Help!! engine doesn't fire up anymore

Post by spidernut »

I tested the spark plugs and there was a small spark, then nothing after that.
Because of lack of spark and metal shavings inside your distributor:
1. Remove distributor cap, crank motor and look to see if the distributor shaft is bent
2. Double check your magnetic pickup gap. It should be gapped about the thickness of a credit card
3. Look for damage to the posts inside your distributor cap. The rotor should never touch the contacts so there should be no damage
4. If all of that checks out okay, conduct a resistance test on your coil to make sure it is good.

Report back when you check these things.
John G.
1979 Spider (Owned since 2000)
1971 124 Sport Spider (Owned since 2017)
1977 Spider (Sold 2017)
1979 Spider (Disposed of in 2017)
1979 Spider (Sold 2015)
1980 Spider (Sold in 2013)
1981 Spider (Sold in 1985)
2017 Spider (Owned since 2019)
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