Injector balance test
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Joined: Apr 2003
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From: West Chester PA
Injector balance test
Anyone know how to do an injector balance test WITHOUT a fuel injector and harness tester? I have the fuel pressure gauge, but need to know of a way to isolate each cylinder...
Thanks.
Matt
Thanks.
Matt
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Joined: Feb 2003
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From: Eastern WA
The ECM in some Fords will allow you to enter into a cylinder balance diagnostic mode using your scan tool. What happens is each cylinder is sequentially dropped via killing the injector and the change in engine speed is noted. Dropping a cylinder and with a resulting engine speed change much more dramatic (ie, minimal change) than the others is flagged; I don't recall the percentage change in engine speed that throws up the flag. While this does not directly confirm a weak injector, you should be able to swap a suspect injector with a cylinder that passes the test then repeat the test. If the problem follows the injector, you found it.
Last edited by CowboyBilly9Mile; Dec 28, 2005 at 01:43 PM.
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Joined: Nov 2001
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From: Topsfield, MA
Originally Posted by andym
This is an OBD-II only feature, as far as I know.
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MAHinton
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
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Oct 12, 2003 11:26 AM
