 Got her running..., 4000 RPM idle speed!!!! |
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| bpetry |
 Dec 3 2007, 09:58 PM
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Newbie  Group: Members Posts: 8 Joined: 12-November 07 From: Springboro, OH Member No.: 8,324  |
OK, so I just got my '72 1.7 EFI running for the first time. Replaced all the vacuum and fuel lines and I thought everything was hooked up corectly per the pelican tech diagrams but after she fires up she idles for a few seconds and then zips right up to 4000 RPM (with no muffler I'm sure the neighbors loved that!). The throttle plate is almost all the way closed so it must be sucking air from somewhere else. I pinched off the big hose that goes from the plenum up near the oil fill and that seemed to slow it down a little, but I don't like letting it rev that high, especially when it hasn't been run in so long so I shut her off and figured I'd come in and ask the experts, any ideas? Regards, Brian Petry, Springboro, OH |
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| ConeDodger |
Dec 4 2007, 11:40 PM
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Apex killer! Group: Members Posts: 24,094 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California 
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Mark asked me to take a picture of it and I will get to it one of these days... I had a 2.0 intake plenum that I powdercoated and subsequently sold to Jeeper John. When I delivered it to Mark to put on Johns 2056 build I noticed as soon as I had it in the light that it was full of pin holes. These are vacuum leaks. Vacuum leaks are NOT ALLOWED with fuel injection. Somehow, you have a vacuum leak.
I gave John his money back. |
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Posts in this topic
bpetry Got her running... Dec 3 2007, 09:58 PM
jimkelly first get a muffler on it : )
maybe disconnect co... Dec 3 2007, 10:11 PM brp986s I disagree with altering the ecu mixture and cold ... Dec 3 2007, 10:46 PM McMark The throttle would have to be significantly open t... Dec 3 2007, 11:28 PM nola914 There's a bunch of possibilities. Sounds like... Dec 3 2007, 11:32 PM Dave_Darling You have a large air leak. Most likely you have a... Dec 4 2007, 02:38 AM BiG bOgGs Just recently I got my engine fired again, also af... Dec 4 2007, 06:15 AM bpetry Thanks for all the replies. I've got a bunch ... Dec 4 2007, 06:46 AM army dude Its not supposed to idle that high?
Ian Dec 4 2007, 02:14 PM swl I agree with all the air leak guys. It is going to... Dec 4 2007, 07:27 PM
bpetry Yep it was the AAR hose to the intake. I plugged ... Dec 4 2007, 11:25 PM McMark Bring it with you Saturday Rob. We'll show it... Dec 5 2007, 12:17 AM |
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