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Old 05-16-2018, 11:05 PM   #28
PromiseRing
We don't even like Volvos
 
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Join Date: Feb 2014
Location: Missouri
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Quote:
Originally Posted by ZVOLV View Post
Why would bypassing a relay when there is already power do anything for you?
Just because some voltage is getting to the relay doesn’t mean sufficient current is being supplied to the injectors
Quote:
Originally Posted by MikeSr. View Post
Pull the fuel injector relay, then jump power to the output. If it starts and runs, the ecu has failed to provide a ground, a common failure. Replace it.
Jumping the fuel pump relay doesn’t work on a 7/9 because it also provides power to the RSR. So your pumps will cycle but injectors won’t fire. At least on the ones I’ve driven.
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