97 Cad ETC EVAP hoses
I can't find any pictures that show how the vacuum lines in and around the EVAP are hooked up. Does anyone have either clear cut pictures or an schmatic that shows what lines go where?
Thanks for your help, Brad |
Does it have the 3.8 or the 4.0 engine.
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1997 Cadillac Eldorado Touring - 6M0306501 K, M.A.P. & Oxygen
1997 Cadillac Eldorado Touring - 6M0306701 K, Fuel Supply System 6EL57 I dont know if this helps but here a couple of pics |
rjblazer,
It has the northstar 4.6L motor. The first picture is close. I don't know if it makes any difference, the car was purchased in CA. Anyway, I'll give it a shot and see what happens. Then I can get after my original problem. It flashes a #2 bank lean condition. #1 bank sometimes a well. This indicates an air leak somewhere that I've so far been unable to locate. I even replaced the intake manifols to no avail. Thanks for the info, Brad |
once you make sure all the vacuum lines are good, try running the engine and spraying carb cleaner around different areas. if the motor changes pitch thats your leak
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vacuum leaks Northstar
Originally Posted by jwfirebird
(Post 1579745)
once you make sure all the vacuum lines are good, try running the engine and spraying carb cleaner around different areas. if the motor changes pitch thats your leak
Brad |
whats a clay check?
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Clay check is a method we use to use back in my old hot rod days to check piston/valve clearence. It use to get rather messy when a valve would kiss a piston at high RPM. Where the intake ports on my cyclender heads are located may not exactly match up to the intake manifold, thus an air leak. This way I can check how the two mate together. Where ever there's a problem I can then address it and stop the leakage.
Brad |
ok. if you replaced the intake and gaskets, there could could be a component causing the air leak. like the heat controls or egr. basically anything after the maf can cause the lean codes.
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"ok. if you replaced the intake and gaskets, there could could be a component causing the air leak. like the heat controls or egr. basically anything after the maf can cause the lean codes."
True, but I independly unhooked each hose and disconnected the connector on each device hooked to the intake manifold and nothing changed. Only when I sprayed carb cleaner inderneath the intake manifold did the fuel trim change. That leeds me to believe that the gaskets are not compleeting sealing on the inside of the manifold. Once I take the throtle body off the intake manifold I will be able to place the manifold in the right place and the clay will show me the wide spots. After that I can either shave down the intake manifold or use somthing like permatex to seal the intake ports. Brad |
sounds like you got it figured out then. i have had issues with end-seals before and i normally just use black permatex anyway, should work for you
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Problem Solved,
But you won't believe the fix. The worse leak was around cyl. 2 on the inside. It was causing the fuel trim to go nuts. If you look at the bolt locations, you'll find that the four corner locations are not in far enough to give even pressure on those end intake ports. The fix was a large flat washer about 1 1/4 dia. and a small hole to pass the intake manifold bolts through. There is a web piece that extends from the intake runner to the bolt boss. Granted the washer doesn't fit flat on the boss and it rides up on that web. That's the key. It exerts pressure on the web and in turn exerts more force to the inside seating surface of the intake manifold. When I put the washers in the fuel trim settled down to where it should be. How's that for a fix...... Brad |
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