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89 dodge dynasty start but no idle?

Updated: 10/24/2022
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16y ago

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I have a '91 Dynasty 3.3 and mine did the same thing. After changing the map sensor, fuel pressure regulator and a couple others I went to a bone yard picked up a SMEC (which I was advised that it was probaly the colpit) I pluged it in and it's been running since. Knock on wood..these dam Dynasty's have something in the SMEC that when it thinks it is being stolen it will automaticly cut of the fuel supply. Good luck

By "start but no idle" I assume you mean the engine starts up for a second or two and then dies, as opposed to running fine except at idle. I have an 89 Dynasty 3.0 which did a similar thing. It would start and run for maybe 3 seconds and then die, and the problem was worse when it was hot. long story short, after several mis-diagnosis from several shops including the local dealership, the problem turned out to be the fuel pump which is located in the tank. After paying $75 for the pump at NAPA and $100 labor, I was back on the road running fine.

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