ryan350z

iTrader: (18)

Just a heads up guys, I had what I thought was a bad injector. Long story short I was driving down the road just doing 45 or so and all of a sudden the car started to lurch along, and I noticed a rather large cloud of smoke out the pipes. I pull over walk to the back of the car and notice fuel dumping out the pipe on the right side. I go I know what this is a bad injector as I have seen this on my camaro and my old mans vette. So I limp her home and kill most every living animal in southwest florida. I park it put a fan on her to cool her off. Next day I pull off the upper and lower intake get to the injectors check the resistence on them to find all my seimens 630cc's at roughly 12 ohms each. All in spec. Then I start checking the wires for continuity number 5 not reading good. So i start checking the harness and find a wire broken between the main harness and the ecu plug. I run a new wire from the #5 injector to the ecu re recheck at the injector and all is fine put it back together and starts and runs just fine. Car has a builf long block adn twins and has been taken part quite a bit so just throwing this out there in case anyone else ever comes accross a simular situation.

Thanks
Ryan

done12many2

iTrader: (33)

I assume that the broken wire cause the injector to stick open?

I guess that is better than sticking shut

ouch1011

An injector sticking open, especially a 660cc injector, can flood the engine with so much fuel that it might hydrolock. It will also pump in enough fuel that it will get into the oil and can cause an explosion in the crankcase. Fuel in the oil can also cause bearing damage. Definately not ideal.

The worst that will happen if the injector sticks closed is that cylinder won't fire. If it isn't injecting any fuel, it cannot run lean, since there has to be combustion for it to run lean.

So, explain how an injector sticking open is worse than sticking shut...

ryan350z

iTrader: (18)

Stuck open