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Old 11-04-2017, 02:38 PM   #1
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Join Date: Oct 2017
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Injectors not spraying gas

96 Chevy bluebird 66 passenger that's been sitting a couple years. For some reason injectors aren't spraying gas into carb. Hooked up a extra boost battery and they started to spray. Drove it a few minutes then tinkered with distributor to get timing better and when I went into gear it went dead and hasn't started again. Is there something that's shorted or thats shutting the fuel pump off so it won't put gas on carb. Any help on this bubsomeone who has had this issue thanks

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Old 11-04-2017, 03:26 PM   #2
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Join Date: May 2016
Location: Georgia
Posts: 2,264
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
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Originally Posted by mastervsdoctor View Post
96 Chevy bluebird 66 passenger that's been sitting a couple years. For some reason injectors aren't spraying gas into carb. Hooked up a extra boost battery and they started to spray. Drove it a few minutes then tinkered with distributor to get timing better and when I went into gear it went dead and hasn't started again. Is there something that's shorted or thats shutting the fuel pump off so it won't put gas on carb. Any help on this bubsomeone who has had this issue thanks
Many old carbs don't "spray" gas like fuel injectors do. They rely on the intake of air to sort of "suck" gas from the jets. That said, many do have what's called an "accelerator pump" which gives a small spray of gas when the throttle is pushed.

Is this bus running a mechanical or electric fuel pump? (You may have mentioned earlier but I don't have time to look right now). I am guessing it originally had a mechanical pump but it could have been changed at some point. If it's mechanical, it may simply be worn out or, more likely, the rubber diaphragm inside has deteriorated from age. An electric pump should be simple enough, power has to come from somewhere. It's either getting power, or it isn't. A test light will answer that easily enough. If it's not getting power, trace back the wiring to a point that is getting power. It could be as simple as a blown fuse, a shorted wire, or the fuel pump is drawing more power than it's supposed to.
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Old 11-04-2017, 04:58 PM   #3
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Join Date: Mar 2011
Location: Port angeles, Wa
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Year: 90
Coachwork: bluebird conventional
Chassis: international
Engine: dt466
Rated Cap: 72
We need more info on the engine. 96 makes it throttle body injection, pump may be in the tank, the ignition module also triggers fuel injectors. get it tested. Do you have an OBD connector?
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