early 90's GM 3.1 or 3.4L engines

[Ziggy100]

Originally Posted by southernnaturelover

which 3.4 are you talking about? Ohv or dohc?

ohv

[Boo_Urns]

Question for the experts on here: Which GM V-6s (from the 90's) had that horrible sound under load due to that even-odd firing? Used to sound like the engine was gurgling / drowning... Would be interested if anyone has info / memories of this...

[southernnaturelover]

Originally Posted by Boo_Urns

Question for the experts on here: Which GM V-6s (from the 90's) had that horrible sound under load due to that even-odd firing? Used to sound like the engine was gurgling / drowning... Would be interested if anyone has info / memories of this...

You’re probably referring to the multi-port injected ones (MPFI written on the plenum). Starting in 1994 they started using the SFI version, which sounded totally different. I think the Lumina didn’t get the SFI version until ‘95.

FWIW, I always thought they sounded pretty good.

[southernnaturelover]

Originally Posted by Ziggy100

ohv

They were really good engines with the exception of the intake manifold gaskets on the 94+ models. A lot better than the Ford Essex 3.8 that blew head gaskets.

[Ziggy100]

Originally Posted by southernnaturelover

They were really good engines with the exception of the intake manifold gaskets on the 94+ models. A lot better than the Ford Essex 3.8 that blew head gaskets.

And the leaking freeze plugs, and the leaking exhaust gaskets, and the prematurely failing coil packs. I have no idea what happens after 80k miles because I wasn't going to stick around to find out.