Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Upper intake manifold gasket

For the Eagle eyed of you, if you look at the corner of this manifold gasket near to my fingers, you'll detect a bit of a chunk out of it. Until recently I've never had any MIL codes but have recently had some lean running ones for both banks of the V6. I've always had a slightly rough idle as well. Error codes aside, would this chunk out of the gasket cause a slightly rough idle but not cause sufficient enough of an issue to cause error codes?

Been cleaning the mating surfaces today pending the delivery of my intake gaskets. One of the lower intake bolts could be removed by hand it was that loose. All torqued down now, but makes you wonder how difficult it is to chase down the causes of symptoms.

Replaced both gaskets for OEM ones. Still get codes, now the original one for lean mixture (P0174). I changed the MAF sensor recently to see if that might have cured my slightly rough idle, it didn't, so might revert to the old one and see what happens.

A few months ago when my Roadster was suffering from premature cut-out, I invested in some MAF cleaner spray (oh yes, very niche -- smells like somewhere between switch cleaner and carbon tet), but it was a lot less expensive than buying a new MAF sensor. In an unrelated alert, my OBD code reader has helped me 3 times by deleting the fuel gauge error code, yes I know there's a problem in there somewhere but as I use the odometer method of deciding when to re-fuel I'm not too bovvered.

I cleaned my maf before but had no effect. Its annoying trying to chase a fault. I need to replace a rocker cover gasket, so when that arrives, I'll see if that makes any difference.