Got her running..., 4000 RPM idle speed!!!! Options

[bpetry]

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

[swl]

I agree with all the air leak guys. It is going to be something big. You know your hoses are good - that's a great start. Has anything popped off? I keep pulling off the line going from the aar to the decel valve - thats enough to push it up close to 4000rpm. That crack in the AAR hose may also be big enough to do be contributing if it is the one on the manifold side. I suppose you could plug it to check if that is the source of the air leak. Might be harder to start but it shouldn't do any harm. Better let someone else confirm that though 'cause I'm flying by the seat of pants on that one.