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 15 2024, 07:46 AM
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#2
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914 Guru Group: Members Posts: 6,468 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
There are a lot of assumptions built in to this thread.
The fact that it cut out completely and suddenly while running doesn’t sound like typical vapor lock to me. Other possibilities: Complete loss of spark - coil problem when hot Wiring / grounds (less likely than coil) Heat induced issue with ECU (rare but not impossible) Follow Clays advice to use temporary fuel gauge to monitor fuel pressure. I’m not a fan of permanent fuel pressure gauges in the engine compartment. Especially on higher pressure Fuel injection lines. Increased fire risk / leak sources. Have a DMM with you to trouble shoot electrical / wiring Use basic tools like factory tool kit to remove a spark plug if in a no-run condition and verify whether or not spark is present. That little bit of troubleshooting can determine whether you have a spark / ignition problem or whether it’s a fuel delivery problem. |
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