Is this the dreaded 914 vapor lock?, Asking for your ideas and thoughts |
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Is this the dreaded 914 vapor lock?, Asking for your ideas and thoughts |
Artfrombama |
Jul 14 2024, 05:04 PM
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#1
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Member Group: Members Posts: 156 Joined: 21-January 24 From: Alabama Member No.: 27,870 Region Association: South East States |
Drove my 914 to a PCA function yesterday morning, 93f and humid.
After driving on the interstate at 70-75mph for around 45 miles I exited and the motor died. I had enough momentum and coasted into a gas station/convenience store where I topped off the tank and tried to restart the car, no luck. The car would fire, run a few seconds and die then refused to re-start for another 10-15 minutes then the same scenario again. No tools to diagnose or repair. While waiting on AAA for three hours (another story) I would occasionally try to start the car with the same results. Today, car started normally, runs normally. 1974 L-jet, original three bung fuel pump, original location. 500 miles on new tank, sock, filter, ss lines. |
Superhawk996 |
Jul 24 2024, 09:54 PM
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#2
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
The temp sensor in the head - TS2, commonly called cylinder head temp (CHT) sensor should not be 14k ohms at room temperature conditions.
Here is the plot of temp sensor resistance vs temperature 14k ohm from CHT is going to force a very rich cold start condition. During summer temps would be too rich to fire. Are plugs wet and/or black soot covered immediately after trying to start the car? |
Artfrombama |
Jul 25 2024, 08:29 PM
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#3
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Member Group: Members Posts: 156 Joined: 21-January 24 From: Alabama Member No.: 27,870 Region Association: South East States |
The temp sensor in the head - TS2, commonly called cylinder head temp (CHT) sensor should not be 14k ohms at room temperature conditions. Here is the plot of temp sensor resistance vs temperature 14k ohm from CHT is going to force a very rich cold start condition. During summer temps would be too rich to fire. Are plugs wet and/or black soot covered immediately after trying to start the car? @Superhawk996 Apologies, 1400 ohms, not 14K. The plugs are black but dry. |
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