Failed Emissions Testing

The car has a cat.  The EGR system does not work and is capped off at both ends of the EGR pipe.  However it passed the NOX so I am not too worried about the EGR system.  If anything the non functioning EGR should have caused the combustion chambers temp to be higher and reduced the high HC's.    I am going to pull down the top end next weekend, do a compression test and injector swap out with a set from a friend.  See if it makes any difference.

Well here is the scan from the test today.

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85GT 5spd ,93 Eldorado 4.9 Dual O2 Custom Chip, Archie Clutch. Custom Exhaust.  MSD Everything 245/50/16's   Not Your Average 4.9    Capt Fiero Com --- My Over View Cadero Pics     Yellow 88GT 5spd Stock.
     

Well update.  I had it all apart and did a compression test, cylinder's 1-5 were 140-150 lbs across, cylinder 6 initially hit 120, then on 5 retests got a best of 70 and that was with 2 cap fulls of oil dumped directly down the intake port.  The intake valve was not sealing.  I backed the rocker off to the point that when the cam allowed the valve to close the push rod was sloppy.  I smacked it with a hammer, I sprayed carb cleaner down it, I got the valve in the closed position and left carb cleaned down the intake port over night, it just would not seal.  So today, I did the deed.  I tore the entire top end off and pulled the heads.  It is very obvious in the pics which cylinder was not firing.   (hint its the one that still has the brass compression tester fitting in the plug hole)

A big thanks to Blair for pushing me to remove the heads and Graeme for coming over today and practically standing over my shoulder telling me to "just do it" get it done.  I was really not in the mood to work on the car today, but when your friend is standing there giving you crap about not doing it, you kinda got 2 choices, punch him or get off your butt and get to work.  (both require about the same amount of work but only one would get me any progress)

So the heads are off, I am going to tear them down and junk em.  I have a spare set of good 2.8 heads here.  I am probably going send them off to be checked for sure. The rest of the engine is in good shape.  The cylinder walls are so fresh that you can still see the hash marks.  There is no ridge at all.  I tried to show that in the pic where I smeared around the oil.  I have to get one of my manifolds ported.  I have 6 sitting on a wall of which for some odd reason only one is ported, the others are stock.  So I will get another spare one done.  Maybe by next week I will have all the parts done and get this car back on the road.  Will be nice to be able to park the V8 car and get some much needed tinkering done to it.  I broke way to many parts racing it around all winter.  

Bad Valves on #6

Good Cylinder Walls

Old Heads Complete

New Nice Heads

Spare Manifolds

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85GT 5spd ,93 Eldorado 4.9 Dual O2 Custom Chip, Archie Clutch. Custom Exhaust.  MSD Everything 245/50/16's   Not Your Average 4.9    Capt Fiero Com --- My Over View Cadero Pics     Yellow 88GT 5spd Stock.
     

It was meant in the nicest overtone.  :)  Thanks again for all your moral support today.  I don't think I would have got it done otherwise.

As for that last manifold.  I found it, err rather got the call to tell me where it was.  I forgot I gave it to Chris last summer to get welded up.  It was still in his trunk where we left it.  I ran over to his place tonight, we jumped in his truck and ran it down to the shop he opened up the shop special so we could fix it up.  He has special tools that make it really easy to do stainless pipes.  And seeing as he does stainless welding on a daily basis I knew he was the best person for the job un link most exhaust shops that weld on junk mild steel stuff.  So a huge thanks to Chris for all his help today as well too.