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Identical injectors

Rajesh Vee

Rajesh Vee

Junior Member
Of all the injectors, while locking it in computer, it shows error in 1st injectors. But when replacing it with identical ones, why it's showing error on it. Does it have a software issues, ECM is not configured properly. How to fix it?
 
Most vehicles old enough to need new injectors don't have any computer feedback for injector errors. Instead they would be deduced by a misfire on a particular cylinder, an out of range O2 sensor reading, possibly a fuel trim reading out of normal range, or in worst case a glowing red catalytic converter due to fuel being dumped into the exhaust. Maybe a vac leak if the injector o-ring is leaking.

It would be good to mention the make/model/engine you're dealing with, what (problem or error indication) precipitated the injector swap, and whether any operational problem remains or whether the only issue is an error message?

If it set an OBDII error code, did you clear the code after the repair? Did you do the repair yourself or this came from a repair shop with a problem remaining?

Do check the wiring. With engine running you should get voltage pulses on the injector connector from a multimeter reading, which can be compared to the pulses on the other working injectors' connectors.
 
mindless1 said:
Most vehicles old enough to need new injectors don't have any computer feedback for injector errors. Instead they would be deduced by a misfire on a particular cylinder, an out of range O2 sensor reading, possibly a fuel trim reading out of normal range, or in worst case a glowing red catalytic converter due to fuel being dumped into the exhaust. Maybe a vac leak if the injector o-ring is leaking.

It would be good to mention the make/model/engine you're dealing with, what (problem or error indication) precipitated the injector swap, and whether any operational problem remains or whether the only issue is an error message?

If it set an OBDII error code, did you clear the code after the repair? Did you do the repair yourself or this came from a repair shop with a problem remaining?

Do check the wiring. With engine running you should get voltage pulses on the injector connector from a multimeter reading, which can be compared to the pulses on the other working injectors' connectors.
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Most of my problems were diagnosed and solved with your suggestions only. Thanks for your support!
 
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