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91 chevy 1500 5.7l wont start

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Old 06-14-2011, 01:18 AM
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Default 91 chevy 1500 5.7l wont start

ok i know its a truck and not a blazer but it should still have the 5.7l v8 in the blazers. the engine cranks but theres is NO fuel spraying from the injectors. i replaced fuel pump, fuel filter, a set of injectors from a working motor, and the ignition coil. wires look good but plugs could be changed.

if i keep cranking and cranking for like 20 seconds or more then it MIGHT fire up and run. if i spray starting fluid in the throttle body then it will start but then die. if i keep spraying it down the carb while starting it will start and run PERFTECT and idle. it will start right back up when warmed up. if left for 30min or more then it will be very hard to start or not start at all. but once started it will run all day.

it used to want to die all the time and have a poor idle before i replaced the pump. but after putting the new pump in, it runs very well. but hard to start.

sometimes it will start if you keep trying to start it till the battery is about to die. but then sometimes it wont.

playing with the wires under the hood and the wires at the injectors doesnt seem to do anything.

any help is much appreciated
 
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