Fuel Have you ever heard of this happening on our 2.2's ? - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #1 of 3 Old 09-07-2019, 04:06 PM Thread Starter
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Have you ever heard of this happening on our 2.2's ?

I don't know what car the poster quoted below was speaking about but it made me wonder can the same thing happen with the mechanical fuel pumps on the 1980's Dodge & Chrysler 2.2 L. 4 cylinder vehicles with carburetors?

"Older car? I had a car once burning oil due to a bad mechanical fuel pump literally pumping oil and fuel into the cylinders burning a gasoline oil mix, after new rings, new heads and still fouling plugs and burning a quart every 100 miles (yes you read that right) and old school mechanic in broken English told me (without seeing the car) "brokeeen fuela pumpa" well guess what? Those old school guys do know a thing or two, a ruptured diaphragm was sucking oil and fuel and doing a nice mix in the fuel line and going right into the carburetor."
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post #2 of 3 Old 09-08-2019, 06:43 AM
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Re: Have you ever heard of this happening on our 2.2's ?

hmm - not having looked at a 2.2 mech. fuel pump in about 30 years ..

most mech fuel pumps share the same design:

thus a failure mode whereby fuel is sucked into the crankcase or vice-versa is certainly possible
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post #3 of 3 Old 09-08-2019, 10:20 AM
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Re: Have you ever heard of this happening on our 2.2's ?

I could see it more easily happening with a mechanical pump installed like the pic above
- IF there were a leak in the diagram that allowed raw fuel to drip down into the lower part of the pump

I'd have to suspect a leak in the assembly rather than a rip in the diagram as a rip is more likely to stop the car from running although you'll probably dump gas into the crankcase tryin' to start it

to physically "pump" fuel into the crankcase I think the diagram would likely need to be intact and only have a leak at it's edge or center where it's attached physically to the rest of the pump assembly
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