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1991 fuel injector problem

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Old Apr 20, 2009 | 11:25 AM
  #1  
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Default 1991 fuel injector problem

i have a 91 S-10 blazer with the 4.3 4x4 and im getting .12v to the driver side injector which just pumps fuel on top of/all over the NEW injector an im getting .00 .01v to the driverside injector which inst bringin any fuel through

any thought? or methods of fixing this
 
Old Apr 20, 2009 | 11:27 AM
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Have you checked the wiring back to the ECU? Both should be getting the same signal. It is a PWM (pulse width modulated) signal so you really need a scope to see what it really is getting.
 
Old Apr 20, 2009 | 12:36 PM
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ya all wires are fine none are pinched or cut so idk why the driver side injector and getting no power.
 
Old Apr 20, 2009 | 03:14 PM
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How fast is your refresh rate on your DMM? Are you just not capturing the peaks when the pulse happens? Have you tested it with a noid light?
 
Old Apr 20, 2009 | 04:33 PM
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Originally Posted by swartlkk
How fast is your refresh rate on your DMM? Are you just not capturing the peaks when the pulse happens? Have you tested it with a noid light?
no i havn't. i dont have a light. i tested the power to the injectors with a voltage meter.
 
Old Apr 20, 2009 | 08:48 PM
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Was it a digital or analog volt meter. Reason I ask is because the IPW (injector pulse width) may only be a few milliseconds with a few milliseconds between pulses. A DMM with a low refresh rate may only see one part of the signal.
 
Old Apr 21, 2009 | 01:08 AM
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its digital meter
 
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