79 Spider 2000 dying at 195 degrees

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barnesjtsl
Posts: 203
Joined: Fri Apr 03, 2009 2:13 pm
Your car is a: 1979 Spider
Location: Hillsboro, OR

79 Spider 2000 dying at 195 degrees

Post by barnesjtsl »

A year ago I installed a 32 adf and single plane manifold. Ran great for a year.

After letting it sit all winter I took it out a month ago and it shuts down at 195 degrees. It does this consistently either when driving or when just sitting idling. When driving it, it seems to run perfectly until it gets to 195 degrees then shuts down.

Thought it was a vapor lock. Took the gas cap off today and let it run. Still shutdown at 195 degrees even with the gas cap off.

I looked down the carburetor and pumped the linkage and it is getting gas.

Starts up again fine when I let it cool down.

When this first started happening I thought it might be flooding. I took the upper part of the carb off and the float is set properly.

When I let it idle the lower radiator hose heats up before it gets to 195 degrees so I know the thermostat is opening.

Thoughts?
18Fiatsandcounting
Posts: 3798
Joined: Fri Mar 15, 2019 11:23 pm
Your car is a: 1969 and 1971 124 spiders
Location: San Francisco Bay Area

Re: 79 Spider 2000 dying at 195 degrees

Post by 18Fiatsandcounting »

My first thought is the ignition system. If you have electronic ignition (which would be standard in 1979), it's pretty common for a failing Ignition Control Module (ICM) to stop working when it gets too hot. The same thing can happen with an old ignition coil, and that can happen with either points ignition or electronic.

By the way, 195 degrees (slightly over the halfway 190 mark) is fine on a hot day, especially on the 2L engines which tend to run hotter. The fan won't kick in until a little after that, like 200 or so.

-Bryan
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