Stumped

[Steve Wood]

so what did you do about the valve?

[motorhead]

Were you cheated on all of the valves?

[larrym]

Took the head to the machinist he touched up the seat and vacuum tested them set me up with 6 new seals on the exhaust valves as 4 were floating and not on the guides. Charged me an hour no parts he said my back pressure was pushing the seals off....

[motorhead]

I am no mathemagician but that would be some pretty serious (back)pressure to push all the way back up the port, and then up the guide in order to lift the seal, under load.  Sounds like crappy fitting parts or setup from the get-go.

[larrym]

I agree Mike the old ones were the stock Felpro the new ones were steel caps no spring.
The liners in the guides were new and tight when I inspected them either the seals were not installed properly or they were too loose to start.


I pressure tested that cylinder after I torqued the heads sealed up so I'm happy. New chain and equal cylinder pressure I'm looking forward to getting it back in. I suspect my boost flutter will be less if at all once this is done.

[Steve Wood]

yeah...somethi ng ain't right

[larrym]

so if it was yours car and you had a choice on cam timing would you run it 2 degrees advanced or 2 degrees retarded. My turbo spools pretty quick and lag is not really an issue.

[Scoobum]

A while back two of the locals complained there cars were turds. I mentioned to them to check their cam timing. Since I don't know anything, about a year later they checked...and both cams were retarded. Go figure.

[larrym]

Lol yes I know guys that don't check they just close their eyes and install the cam.
Most of the time it works out ok but you never know what you are leaving on the table.

[Steve Wood]

it's probably fine as it is, but, if I had my druthers, I would probably rather be +1 from the cam card on a street car

[larrym]

My thoughts too thanks for the opinion

[larrym]

Well now I'm beyond stumped.....
Motor is back in new head gaskets, timing chain, intake gasket, leaky exhaust valve sealed up. It's still lean at idle.  Tested all the LS coils 1 is suspect I will swap it tomorrow. Than I guess it's time to try a fuel pump. I smoke tested it again.

[larrym]

..... It's better but something is still a miss. I pulled the dog house and sealed everything again IAC TB power plate Dblock it still idles rough.
IAC is set at 10 TPS is .47 BLM is much better around 120 where it was before. it's late and I will play with it tomorrow. Got 2 extra plug wires I will swap them out 2 at a time and see if that's the problem my wee brain hurts.

[Steve Wood]

Tps is on the outside edge of the window. Lower it to make sure it stays in. Pull one injector connector at a time and see if there's a cylinder or two that does not make it worse

[larrym]

Ok I might have found something? I went to start it when it was cold. Start stall, start stall  hmm identical symptom to when I forget to plug in the MAF. I unplug the GENll translator fire it up and away it goes idling like a champ throws a code for low MAF but that's to be expected. Checked all the wiring to the GENll it appears fine. Gonna see if I can borrow a regular translator and a chip to try see if that changes anything.
I reset the IAC 20 and TPS .45 seemed to idle a little better.