I just put a lingenfelter super ram plenum and runners on 85 Z28, but I've run into a snag. I am using the stock base manifold and fuel rail. There is a tube with what looks to be a sensor coming out of the back of the fuel rail on the drivers side, and I know on the old runners, there is a hole where this plugs into on the drivers side runner. On the new one however, there is no hole for it. Seeing how I don't really know what it is or what it does I'd like to start there. Secondly, I'd like to know if there are any alternate spots to put this sensor. Thanks.

 

What you are looking at is the cold start injector at the back of the fuel rail and no, there is no alternate place to locate it.

The Trickster!!!!!!!!!!!!!!

 

So what would you recommend I do now. I have no place to put it, but I'm not sure I want to get rid of it nor do I know the best to do it. I don't drive it in the winter, only in spring and summer so I wouldn't really need it would I?

 

About the only options at this point are to try to get the correct driver side runners or convert to a 165 ECM and the 1989 code that does away with the cold start function.

Yes you need the cold start injector (or 1989 code) even in the summer/spring. It operated when the coolant temp is 95* or lower. If you do away with it and don't go the 165 ECM 1989 code route you'll have loooong crank times on a cold engine.

 

I have one of those rails in my 1989 Iroc-Z, what I did was remove the plug from the rail and removed the tubing. I then took it to a machinist friend and had him weld the opening on the plug shut and re-face the rear of the plug on a lathe. Put the plug back in the rail with a new seal and have used it for over a year with no problems.

The Trickster!!!!!!!!!!!!

 

So you're saying to remove the tube and sensor from the rail and then have the sensor end plugged shut and put the tube end back into the rail? If you buy an aftermarket rail does it come with a cold start device on it? The other thing I thought was to drill a hole for it in the side of the plenum, but that doesn't sound like a smart idea to me for alot of reasons. Let me know what to do. thanks

 

What I am saying is that there is a fitting that screws into the back of the fuel rail and connects the rail to the cold start injector by a metal tube. Remove the fitting from the back of the rail, remove the metal tube from the fitting, and have the hole in the fitting welded up and then put the fitting back in the fuel rail. This is cheaper than paying about $400- $500.00 for a new rail would you not agree.

The Trickster!!!!!!!!!!!