Fuel from Exhaust
 

I have a 1993 502 magnum MPI.
When the engine is running gasoline is coming out of the exhaust pipes. I removed the injectors and had them cleaned/tested. This did not correct the problem.

Does any one know what is causing this?
How do I correct this?

Thank You.

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The only way for fuel to get into the exhaust it through the cylinders. It sounds like you have an ignition problem, dead cylinder. Check the plugs, wires and cap.

My 93 Fountain with twin 502 EFI's has done this on both engines. A ruptured diaphram in the vapor seperator tank will cause this to happen. When one of mine went bad there was so much raw fuel it was fogging out one tail pipe. The other one just smelled very rich. Pretty simple to check. Pull the vacume hose off the vst and see if it has gas in it. It should not.
What ever the case make sure to change the oil because it could be diluted with fuel.

Jerry.

had the same problem and had a small hole inside the cool fuel cooler! Replaced cooler everything is OK

I had this happen in a car ,it turnned out to be the lower O rings had been damaged during a prior replacemect of the injectors. In this particular application if you would not lube the O rings they would move or get dameged on instalation.
You could litterly see fuel fog exiting the exhaust.