One Injector Possibly Not Firing?

[scotty nm35]

It could be worth checking the contacts on your ECU plug. I had a similar issue with one injector not firing and it turned out to have a bad connection for that injector on the ECU plug.

I closed the female connection a little, plugged it back in and the problem hasn't resurfaced.

I agree, I have had this head f*ck a few times. It can be a pita to find, depending what pin it is. I swore the issue was dry joints in the ecu last time, but it was just the pin in the ecu plug had opened slightly.

[FBRacing]

I agree, I have had this head f*ck a few times. It can be a pita to find, depending what pin it is. I swore the issue was dry joints in the ecu last time, but it was just the pin in the ecu plug had opened slightly.

I do know a guy that had the same issue also. He had to re-pin his ECU. Problem solved once done. Just figured it was just isolated deal for him since he swap a RB into a S chassis.

[75coupe]

Ok thanks for the suggestion ill check it out...

[75coupe]

Ok update

Ive confirmed injectors are all working

I have continuity tested coil pack harness and injector harness.

Does seem to idle slightly better with cas unplugged but still rough

New spark plugs

Compression test came up with all cylinders fairly the same

[89CAL]

It shouldnt idle at all with CAS unplugged :S

How would it know when to fire injectors + Spark?

[Missileman]

I would think he meant to type AFM

[75coupe]

Oh sorry the vct unplugged

[75coupe]

The most annoying part is, it was running fine before painting some parts... What have i done...?

[89CAL]

Did you paint an Earth or anything like that?

Which parts did you paint/remove and paint?

[75coupe]

Injector caps were removed and paint, vct extending out past rb26 belt cover was painted whilst on car, no belts removed everything masked.

[r31 25t]

Did you re-set timing after re-installing the cas?

[75coupe]

Well it didnt move as i made key marks to re-align it.

[r31 25t]

It might pay to check if the halfround is still in the exhaust cam.

[75coupe]

Yep did that

[r31 25t]

Check the pins in the injector connectors too, the pic on the first page looks like they might trying to come out the back.

[75coupe]

Ok i think ive narrowed it down after checking everything twice, i think the timing is out.

Ive the cam belt cover off a few times over the years and never a prob, could it be the cas is just decided to die. Or the wiring loom has finally broken?

I put a timing light on it and nothing lines up, used the white wire going to no1 spark plug.

Pfc is now saying 24deg and then bounces to 16 and everything in between when warm.

[89CAL]

use a lead between the plug and coilpack. The wire method rarely works

[75coupe]

DVS found the issue to definitely timing, belt skipped three teeth, damn lucky to not have caused major damage, so it shoild all be sorted for track day currently getting timed and some stuff replaced... First time to a mech in 6yrs, and im glad i did

[Ben C34]

Wow. Very lucky!