What causes a fuel injector to short?
So, the most common cause of leaky injectors is; the failure of the O-ring, where the injector meets the fuel rail. The O-ring can become, hard and brittle, from the heat of the engine. If it breaks, then fuel can leak out, over the engine. The other way an injector will leak is if, the injector body or nozzle cracks.
Can fuel injector short out?
Misfire is an obvious consequence of a fuel injector that cannot properly deliver fuel to the engine. If it misses the engine entirely, you will get a misfire, which you will notice instantly and can lead to knocking (pre-ignition), overheating and other engine issues.
Why is my injector circuit short to ground and coolant?
The ECM grounds the injectors, so it is looking for a feedback signal, and when it is not there it will set a fault code for short to ground. You will need to determine where the injectors get there power supply and correct that issue. It could be as simple as a fuse, or on some models it could be the signs of a fuel pump relay going bad.
Can a fuel pump short a injector circuit?
By the way, David, thanks for your time. On this vehicle the fuel pump really powers up the injectors. Normally you would get a short to ground for all of them, no just cyl 1 and 4. It is possible however to have this issue. I am assuming that you did not have a low battery to were the car had to be jumped.
What is the code for a fuel injector failure?
If you are using a generic (not vehicle manufacturer specific) code reader; then you can expect to see codes beginning with P02. For example, a fault with an injector in cylinder one would give a code of P0201.
Can a bad fuel injector cause an ignition fault?
Therefore, careful attention must be paid to any fault codes that are present, since bad fuel injectors will not cause ignition related codes to be set.