Z18ET Headache !

[datman310]

I'm looking for some help / to be pointed in the right direction, I have not alot of experience with EFI, used to carbs and points, anyway the Z18ET in my bluebird seems to have a issue when you put your foot down it just coughs and splutters. it starts fine and if driven softly will run fine. I have checked the AFM seems to be working. plugs look ok coils are new-ish GT40's.

timings correct and was going awesome when i first got it. but seems to have developed this wee issue that seems to be intermittent

could it be fuel pump or computer? I have another motor im getting soon will try swapping computers over see what happens then


Can anyone shed some light on my issue?

[z18et1200coupe]

are you SUPER sure its not your afm? have you tried disconnecting it and taking it for a thrash? it runs like absolute crap until you hit boost, then it should run rich as, but not cough or splutter once in boost

[85_Z31]

You might need to try another Crank Angle Sensor or another Ignition Module after the AFM these are the next most likely to go bad.

Steve , My Nissan Z manual has a few testing procedures for some of these electronics, although different models the electronics are of a simialr type and age

So if your keen to give it a nudge with the multi meter just let me know and we can take a look this weekend.

[datman310]

I tried taking the plug off the AFM and it just wont budge it feels like its gunna break off, mind you i can be a bit of an ape when it comes to that kind of thing maybe there's a trick to it and yea James it definitely sounds like a plan as A: i dont know bugger all about this kind of stuff and B: I'm trying to get it to run properly so you can drive it for akaroa

[85_Z31]

No worries dude, I will roll up on Sunday with the book and Multi meter !

[datman310]

sounds good! Bring petrol a rag and a lighter as plan B haha

[datrat]

I tried taking the plug off the AFM and it just wont budge it feels like its gunna break off, mind you i can be a bit of an ape when it comes to that kind of thing maybe there's a trick to it and yea James it definitely sounds like a plan as A: i dont know bugger all about this kind of stuff and B: I'm trying to get it to run properly so you can drive it for akaroa

Hey mate the AFM plug has a spring wire plug set up... you have to pry the spring clip outwards on both ends of the clip for it to release

[z18et1200coupe]

yeah get a flat head screw driver onto the little metal band that clips around the AFM plug and just flick it off.

[broke]

Bags lighting the rag if you decide to go that route, just let me strip all the suspension, brakes and driveline out first.

[datman310]

NO DEAL