Quote:
Originally Posted by KarTek
Don't waste your time pulling the pump unless you know for sure it's installed backward. There are a few threads discussing how to determine if it's on the right stroke but most involve removing the valve cover to observe the position of the cam lobes.
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No you do not even have to turn the engine over to get the installation messed up. If you just set the timing mark on the balancer and pull the original pump.
You might be pulling the pump when it is not on the same stroke that the replacement one sees. If you do not refferance the harmonic balancer mark to the cams position there is a 50/50 percent chance of it being wrong.
Initially to avoid this misteak you can make sure the tang in the injection pump is visable when the harmonic balancer mark is there. Before you remove the original pump. If the tang is not present rotate the engine once. This avoids removing the valve cover.
At the same time before pulling the pump if you set the timing up properly and then look for the tang you will know the pump is installed correctly. Or not. In your case with the 50/50 odds present it is probably off.