larryfs

I pulled the plenum off my 89. what sensor is under there?
also, where can I get all the little O-rings that come off with the fuel rail?

I want to replace everything while I am in there..

thanks.

Aardwolf

That is the MAT sensor (manifold temp) and I just reused mine. They rarely go bad. The fuel line o-rings I think I got from Superior Chevy 800 728-8267 Chris, they were fifty cents each.

Mark_Sheehy

I just changed the injectors on my 89 this past weekend. The only fuel rail O-rings I could get at the dealer were for the fuel line connectors on the front of the engine. The other ones were only available as a kit, which GM no longer sells. I was referred to http://www.vintageparts.org/ and was able to purchase the Delco kit there (seriously way overpriced).

The fuel injector O-rings you can get from The Last Detail.

SEA4

The Felpro intake manifold gasket set comes with the 2 o-rings for the fuel lines (as well as all the runner/plenum gaskets, distributor gasket, injector o-rings, throttle body gaskets etc) but it does not come with the o-rings needed to disassemble your fuel rail (not that you need to..I didn't)