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Old 09-21-2011, 12:54 PM   #1
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Default Newbie 89 chev truck no fuel problem

hi all , and thank in advance for you help and wisdom. love this site!!

89 chevy 1 ton (30 series) motor home. 350 tbi auto trans.
killed on rough road, in a very remote area. would fire if fuel was dumped into tbi.. i checked fuel pressure and it was a bit low, layed in rain and put in new pump, still no start.
with limited tools and info i determined only 10 volts to the fuel pump at the engine harness,, ALSO. not 1 drop of fuel will come out of injector when cranking.
my hunch is a wiring or computer issue, as it is located behind seat and was not secured.
any help would be appreciated... thank you !
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Old 09-21-2011, 01:05 PM   #2
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Start checking over all the wires. I feel bouncing around knocked a wire loose, perhaps a ground wire. Check the fuse box as well, including the back of it.
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Old 09-21-2011, 02:39 PM   #3
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ok thanks! i guess i didnt really know where to start with that. i am not an electrical fan anyways. i guess the wiggle test would be a start right??
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Old 09-21-2011, 02:43 PM   #4
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Yep, I've found if it'* not working right, poke it with a stick.
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Old 09-21-2011, 03:49 PM   #5
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Also if your fuel pressuure switch has gone bad it kills power to your fuel pump..mine died while bouncin around a field its located off the back of the intake behind the distributor..there is also a connector on the lower portion oof the firewall on drivers side if it came unhooked no power to fuel pump
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Old 09-21-2011, 04:14 PM   #6
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Hmm, bouncing around, is this truck equipped with a fuel system kill switch?
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Old 09-21-2011, 04:15 PM   #7
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i thought the same for bubba when my OP switch went out and found no there is not one..So on a pickup no not on mine on a camper i doubt it but idk
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Old 09-21-2011, 04:22 PM   #8
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the research i came up with said it does not. also, i do have some voltage to the pump (10 volts) just not enough. when i bypassed and gave the pump 12 volts, i have great pressure but still no tbi spray at all
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Old 09-21-2011, 04:27 PM   #9
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did you check the fuse for the injectors?
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Old 09-21-2011, 04:49 PM   #10
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yes. also the ecm and ecmb fuses
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