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testing fuel injectors

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Old Sep 5, 2005 | 04:51 PM
  #1  
SFX099's Avatar
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From: Mobile, AL
Car: '95 Trans- Am
Engine: 5.7, Baby
Transmission: Auto
testing fuel injectors

I am trying to find a missfire, how can I test a fuel injector though?



Thanks,
Steve
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Old Sep 5, 2005 | 05:11 PM
  #2  
3.8TransAM's Avatar
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From: Schererville , IN
Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
Well.

U have 2 ways, depending on what is easiest, 3 technically.

First ohm the injectors, theyshould all be within a ohm or so of each other.

If the miss is solid and not intermittent:

Then u can pull injector leads one at a time

Or u can pull plug leads one at a time.

Obvioulsy if u have a dead cylinder, when u pull that one you should get no change and it should get worse if you remove the fuel/spark from an otherwise good cylinder

edit: If u find something suspect or have quick pressure drop even with the return line blocked, pull the fuel rail up and pressurize the system, any leaks/drips shoudl be evident then

later
Jeremy

Last edited by 3.8TransAM; Sep 5, 2005 at 05:22 PM.
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