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Join Date: Nov 2007
Location: Liberty, MO
Posts: 13
Fuel Pump shuts off

Hi

New guy here. Wife bought me a '74 914 2.0 (D-Jet) in June on Ebay. It had a bad engine (dropped valve seat). After a complete rebuild, we can't get it to stay running. It will start with a little gas straight into the throat. Pulled off the cold start injector. If you turn the key, it will send fuel for about one second, then stops. Any suggestions on where to start?

Thanks

Darren
Old 11-23-2007, 03:51 PM
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You need three things: Spark, Fuel, and Air. Check for spark; grab an extra spark plug and plug it into a plug wire. Tape the plug so that the threaded part or the outer electrode are touching a ground like the fan shroud. Watch the plug while someone cranks the starter; you should see nice big fat white sparks.

Next, take at least one injector out and stick it in an old mayo jar. Watch while someone cranks the starter; you should see the fuel squirt into the jar.

If those are both present, check compression. A new engine will have lower compression than a broken-in one, but you should still have compression.

There are flowcharts for the fuel pump operation available on Brad Anders' website, http://members.rennlist.com/pbanders . I think it's the last link on the page.

--DD
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Old 11-23-2007, 04:47 PM
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making progress, new issue with idle speed

Dave,

Thank you very much.

It wasn't the fuel pump after all. I checked and double checked all of the connections, then did the injectors in the mayo jar test. The fuel pump was working. After about 20 attempts, it started and kept running. I'm guessing there was extra air or gas in the lines.

New issue: the air hoses are not hooked up yet. It will run for about 5 minutes, then start smoking a lot and the idle races to 3000 rpm. I can't get it down without turning it off. Is the smoking normal on a rebuild? Suggestions on the idle speed?

Thanks again.
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Liberty, MO
1974 914 2.0
Old 12-04-2007, 07:03 PM
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Vacuum leaks in a D-jet engine mean high idle. If nost of the vacuum hoses aren't hooked up yet, you can expect either non-running or a very very high idle.

--DD
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Old 12-05-2007, 07:08 AM
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