hchase17

I have a popping in the sixth cylinder and when I disconnect the injector it goes away. Does this mean the injector is bad or maybe the plug?

NismoPick

Well... you could always do what I told you to do in your other thread: Check the spark plug tips to see what's going on. Help me help you.

Is the sparkplug wet? With fuel? Oil?
Dry? Is it white? Black?

Let's try simple...

hchase17

if i hadn't lost the 13/16 wrench i would have but I was wondering if this had happened to anyone before and what the outcome was

NismoPick

Maybe a sparkplug... maybe a sparkplug wire... maybe an injector... maybe a sticky valve...

Though by disconnecting an injector, it should lower the rpm and lose power.

hchase17

when i disconnect it it doesn't change much, but it runs prefect under 50% plus acceleration...i checked all the plugs regapped them and adjusted the tps today runs a little better but still the popping and also a brand new fuel pump which did help...I mean its only a problem at idle and constant rpms under about 2500...cuz it still ran a 16.01 bone stock earlier tonight..i just think the injector doesn't put enough into the 6th cylinder unless the fuel pump is forcing it through...it sounds almost like it has a cam the way its missing and if i didn't hear that popping i would think it did

hchase17

well just fixed most of the problem...the p.o. had two of the plug wires switched...still a very small miss and i think that it is the injector because i cleaned and adjusted the afm today and it is doing fine except for the small miss

NismoPick

yeah... those darn switched spark plug wires!

hchase17

yea the guy who had it had just replaced the wires and i was dumb enough not to check behind him

hchase17

OK another question. I want to replace all of my injectors. What size injectors (cc rating) should i get to run 10 psi on a z31 ecu? I want to go aftermarket.

septerra

what equipment would i need to change spark plugs on a 280zx 82NT?? I seen them, but do not know what they are called?

280zx2by2

spark plugs? well your going to need an engine hoist, sledge hammer, a pair of pliers, a stethoscope, some KY jelly, some matches, and a mazda miata...



or you could just use a spark plug socket... or even a regular deep well socket if your desperate....


EDIT**** make that 2 mazda miatas and "for her pleasure" KY jelly... noob mistake on my part :P

hchase17

haha nice yea just screw the olde ones out put some anti seize on the new ones and screw em in...oh yea and make sure they are gapped right.

280zx2by2

i see you typed "how to change my spark plugs" into the googles and got your answer... its that kind of self motivation that keeps this place going...

hchase17

haha nah just common sense

septerra

yeah, i did that. just wanted to be sure coz this ones my first and everything I do is gonna be the first time. I dont even have a bl00dy wrench yet :P . would i be able to purchase one of those plug gappers from the auto store?? the ones that got the measurement with diff thickness like feelers, so u can get the right gap. saw one of em in a youtube video

280zx2by2

yeah you can get them at the counter of most auto parts stores... i have one that's got feeler gauges AND spark plug gappers... you could say im ballin', and you wouldn't be lying :P lol