I'm starting to take out my engine today. Its an lb9. I was just curious, when I unplug the fuel injectors does each connector need to be labeled so I don't plug in a connector to a wrong injector when I hook everything back up later? Thanks

 

I would say yes.

 

I was thinking every injector fired at once so it wouldn't make a difference. Oh well, it's not a big deal. I was just curious.

 

its got 8 injectors right?

 

Correct
Doesn't matter
The way the engine harness is laid out the worst you can do is swap 2 injector plugs on the same bank which would have no effect because all 4 in the bank fire at once

 

ok im not a tpi guy but i would assume that they cant all fire on the same bank at the EXACT SAME TIME... bc all the pistons on that bank are not on the same stroke at the same point at the same time and the injectors should fire similar to the ignition

 

The difference between batch fire and sequential? no i cant remember the other one. Well anyway batchfire is one entire bank at a time so its not as efficient as each individually.

 

gotta admit never heard of batch fire.... seems very very counter effective... so lb9 is batch fire?

 

honestly i have no idea i know tpi and older lt1s are so it probably is

 

ok lookin it up looks like its batch , semi sequential and sequential... obdII would be sequential ... im still learnin ... this is interesting that such a crappy idea woulda been put into such great cars lol

 

Ya i know not really much more efficient of a fuel delivery system than carbs lol. but still fuel injection so hey

 

btw vetteoz that was by no means a personal attack on you... it jus didnt make sense to me... to be quite honest it still dont lol but i do understand a little better now

 

Things are happening so fast in the engine that an injector can fire even if it's not at 'exactly' the right time and the fuel charge will get sucked in 'in the blink of an eye'. Or even faster. It's too late to do the math but you could calculate the time between firings and see the max time the fuel would need to wait. Maybe the sequential system just isn't worth the extra effort (and cost?) unless everything else is perfect.

 

well im guessing it is worth the extra effort since obdII cars got sequential
lol

 

Thats what I thought. Thanks