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A partially blocked catalytic converter might cause the engine to run poor, but it wouldn't keep it from starting. Always go back to the basics. Fuel, ignition and compression. Starting fluid is a good tool to have around when an engine won't start. If the engine runs when starting fluid is being sprayed into the air intake then dies when you stop spraying, you have a fuel delivery problem. If the engine WON'T start when you are spraying starting fluid, it's probably ignition or something internal.

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Q: If After replacing fuel injectors so you know its getting gas the car still refuses to start could the problem be related to the catalytic converter and if so how would you go about testing it?
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Why would the catalytic converter have to be replaced 8 times in a 1997 Chevy Monte Carlo first at 37000 miles purchased new Service department replaced all possibilities and say they do not know why?

Generally, unburned fuel getting into the converter is what damages them. How is it running?, what size engine? What did the dealer say is "wrong" with the converters they are replacing? -->You can easily damage your catalytic converter by making a lot of very short trips and not allowing you car to properly reach operating temperature.


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