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|96 dutchstar 454 throddle body fuel proble||matt||10-28-11|
|When started it runs very rough. i have to work the gas to keep it running.black smoke pours out of the tail pipe.when idling and looking down into the throddle body it seems like too much gas is being delivered.i changed the fuel filter and the gas smells and looks ok.can anyone help here?|
|Re: 96 dutchstar 454 throddle body fuel proble||BUBBA THE BUS TECH||10-31-11|
1st The fuel spray pattern, if it is anything other than a perfect clean cone then you have a dirty or faulty injector, and yes that will cause your issue.
2nd Test fuel pressure, if the fuel pressure regulator is unplugged from its vacume line or faulty the system will deliver way to much fuel.
3rd Have the system scanned with a tool that can see sensor readings in real time, faulty readings from temp or map sensors can cause this as well.