1st Generation S-series (1983-1994) Tech Discuss 1st generation S-series (1983-1994) general tech topics here.

1991 fuel injector problem

Thread Tools
 
Search this Thread
 
  #1  
Old 04-20-2009, 11:25 AM
RolingKCBlazer's Avatar
Starting Member
Thread Starter
Join Date: Sep 2008
Location:
Posts: 128
RolingKCBlazer is an unknown quantity at this point
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
 
  #2  
Old 04-20-2009, 11:27 AM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 41,137
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

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.
 
  #3  
Old 04-20-2009, 12:36 PM
RolingKCBlazer's Avatar
Starting Member
Thread Starter
Join Date: Sep 2008
Location:
Posts: 128
RolingKCBlazer is an unknown quantity at this point
Default

ya all wires are fine none are pinched or cut so idk why the driver side injector and getting no power.
 
  #4  
Old 04-20-2009, 03:14 PM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 41,137
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

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?
 
  #5  
Old 04-20-2009, 04:33 PM
RolingKCBlazer's Avatar
Starting Member
Thread Starter
Join Date: Sep 2008
Location:
Posts: 128
RolingKCBlazer is an unknown quantity at this point
Default

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.
 
  #6  
Old 04-20-2009, 08:48 PM
swartlkk's Avatar
Administrator
Join Date: May 2005
Location: Waterloo, NY
Posts: 41,137
swartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond reputeswartlkk has a reputation beyond repute
Default

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.
 
  #7  
Old 04-21-2009, 01:08 AM
RolingKCBlazer's Avatar
Starting Member
Thread Starter
Join Date: Sep 2008
Location:
Posts: 128
RolingKCBlazer is an unknown quantity at this point
Default

its digital meter
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Matthew L Summey
Engine & Transmission
3
02-11-2013 10:23 AM
aerokirk
2nd Generation S-series (1995-2005) Tech
3
01-06-2013 03:28 PM
sprbld417
1st Generation S-series (1983-1994) Tech
3
09-28-2010 10:25 PM
zman6988
2nd Generation S-series (1995-2005) Tech
40
06-30-2009 06:42 PM
87national
1st Generation S-series (1983-1994) Tech
1
06-03-2007 08:24 AM



Quick Reply: 1991 fuel injector problem



All times are GMT -5. The time now is 06:11 AM.