Well I think I might have found a possible cause of your problems. First i will start describing our problem. Then I will tell you what I found.
We have a 1965 200, with an 4V OZ head, running a stock ignition and the pacemaker headers. We had problems like yours with stalling and the idle. We couldn't get the idle below 1K with out it running very ruff and eventually stalling. We had tuned and adjusted the carburetor in every which way did every thing we could think of to get it working. we were told to check for vacuum leaks, so we plugged every thing and ran it that way and slowly reconnected systems to check for the different leaks. We swore not a single system had a leak. The only thing we could find that would cause a difference was the PVC valve and it didn’t do that much.
Ok does that sound like some of your problems?
Well, the engine's biggest problem was that our block had a small crack (we knew about it). Well recently I have acquired a rebuilt engine with 500 miles engine from a local person who had it rebuilt then decided to go v8. So over this past weekend we swapped out old block with the OZ head out of the car and put this stock rebuilt engine in the car. Hopefully when we get some gaskets from mike (AZcoupe) we will be swapping the rebuilds engine head for the OZ head.
Suggested Problem and solution.
Well when removing the oz engine we had to take the intake off. When we did this we notice that the top of the exhaust header gasket some how got pinched in-between the intake manifold and the head. This created a vacuum leak. This I think was the source of all of out idle problems and out stalling. Below are some links to some pictures, you can see how the very top of it is messed up from being in-between the intake and the head. You might want to check this out for yourself? We have yet to put the oz head on our new rebuilt engine to see if this was the cause but as of now it is our number one contender.
We have a 1965 200, with an 4V OZ head, running a stock ignition and the pacemaker headers. We had problems like yours with stalling and the idle. We couldn't get the idle below 1K with out it running very ruff and eventually stalling. We had tuned and adjusted the carburetor in every which way did every thing we could think of to get it working. we were told to check for vacuum leaks, so we plugged every thing and ran it that way and slowly reconnected systems to check for the different leaks. We swore not a single system had a leak. The only thing we could find that would cause a difference was the PVC valve and it didn’t do that much.
Ok does that sound like some of your problems?
Well, the engine's biggest problem was that our block had a small crack (we knew about it). Well recently I have acquired a rebuilt engine with 500 miles engine from a local person who had it rebuilt then decided to go v8. So over this past weekend we swapped out old block with the OZ head out of the car and put this stock rebuilt engine in the car. Hopefully when we get some gaskets from mike (AZcoupe) we will be swapping the rebuilds engine head for the OZ head.
Suggested Problem and solution.
Well when removing the oz engine we had to take the intake off. When we did this we notice that the top of the exhaust header gasket some how got pinched in-between the intake manifold and the head. This created a vacuum leak. This I think was the source of all of out idle problems and out stalling. Below are some links to some pictures, you can see how the very top of it is messed up from being in-between the intake and the head. You might want to check this out for yourself? We have yet to put the oz head on our new rebuilt engine to see if this was the cause but as of now it is our number one contender.
