Jump to content
SAU Community

Recommended Posts

So I recently got my R32 back (RB20) after 20 months of it not being started. I charged the battery, unplugged the CAS gave it a few cracks and then plug the CAS back in and started it up.

It was running fine 20 months ago, but now it has a misfire on the 3rd cylinder back. Ive changed:

coilpacks between cylinders, nothing changed,

Ive changed spark plugs between cylinders and cleaned them at the same time, no different,

At this point the car wasnt blowing fuel out the exhaust, the sparkplug was dry and in good condition on the 3rd cylinder. Then I pulled all injectors out had them cleaned and tested all 100%, Still no change, but the the car does seem to blow a lot of fuel now unlike before.

Ive pulled the sparkplug out and put it in the coilpack and cranked it over and I can see the spark firing.

As far as I can tell it has spark, it has fuel and it has air.

Suggestions?

Can an igniter cause problems on only 1 cylinder?

Edited by JiN_MaN
Link to comment
https://www.sau.com.au/forums/topic/377750-rb20-misfire/
Share on other sites

Are you 100% sure its #3 even after changing the plugs around? I see you say it has spark, but is it a bright/strong spark?

for 30 bucks I would just chuck a set of new copper plugs in, even if its to eliminate any future problems

Link to comment
https://www.sau.com.au/forums/topic/377750-rb20-misfire/#findComment-6023925
Share on other sites

Police took it to investigate and forgot to give it back. :thumbsup:

Will do compression test when I find my compression gauge.

If its ring it should still have some sort of compression and if its valve then it should just be a flat 0. Is that correct?

Link to comment
https://www.sau.com.au/forums/topic/377750-rb20-misfire/#findComment-6026094
Share on other sites

Police took it to investigate and forgot to give it back. :thumbsup:

Will do compression test when I find my compression gauge.

If its ring it should still have some sort of compression and if its valve then it should just be a flat 0. Is that correct?

No, a damaged piston or head gasket can cause a missfire at idle but not when above 1000rpm. Compression could come back 100% as well.

Valve can be the same. RB's aren't well known for carbon buildup on valves or ports but it can happen.

Do the comp, if it's 100%, do a proper leakdown test

Link to comment
https://www.sau.com.au/forums/topic/377750-rb20-misfire/#findComment-6026223
Share on other sites

Injector plug was the issue.

When all the way on with the c clip it wont fire. When pulled half way off it fires. So pulled all the injector plugs off and gave them a clean, now running 100% :thumbsup:

I thought you checked the injectors?

Link to comment
https://www.sau.com.au/forums/topic/377750-rb20-misfire/#findComment-6038356
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Who did you have do the installation? I actually know someone who is VERY familiar with the AVS gear. The main point of contact though would be your installer.   Where are you based in NZ?
    • Look, realistically, those are some fairly chunky connectors and wires so it is a reasonably fair bet that that loom was involved in the redirection of the fuel pump and/or ECU/ignition power for the immobiliser. It's also fair to be that the new immobiliser is essentially the same thing as the old one, and so it probably needs the same stuff done to make it do what it has to do. Given that you are talking about a car that no-one else here is familiar with (I mean your exact car) and an alarm that I've never heard of before and so probably not many others are familiar with, and that some wire monkey has been messing with it out of our sight, it seems reasonable that the wire monkey should be fixing this.
    • Wheel alignment immediately. Not "when I get around to it". And further to what Duncan said - you cannot just put camber arms on and shorten them. You will introduce bump steer far in excess of what the car had with stock arms. You need adjustable tension arms and they need to be shortened also. The simplest approach is to shorten them the same % as the stock ones. This will not be correct or optimal, but it will be better than any other guess. The correct way to set the lengths of both arms is to use a properly built/set up bump steer gauge and trial and error the adjustments until you hit the camber you need and want and have minimum bump steer in the range of motion that the wheel is expected to travel. And what Duncan said about toe is also very true. And you cannot change the camber arm without also affecting toe. So when you have adjustable arms on the back of a Skyline, the car either needs to go to a talented wheel aligner (not your local tyre shop dropout), or you need to be able to do this stuff yourself at home. Guess which approach I have taken? I have built my own gear for camber, toe and bump steer measurement and I do all this on the flattest bit of concrete I have, with some shims under the tyres on one side to level the car.
    • Thought I would get some advice from others on this situation.    Relevant info: R33 GTS25t Link G4x ECU Walbro 255LPH w/ OEM FP Relay (No relay mod) Scenario: I accidentally messed up my old AVS S5 (rev.1) at the start of the year and the cars been immobilised. Also the siren BBU has completely failed; so I decided to upgrade it.  I got a newer AVS S5 (rev.2?) installed on Friday. The guy removed the old one and its immobilisers. Tried to start it; the car cranks but doesnt start.  The new one was installed and all the alarm functions seem to be working as they should; still wouldn't start Went to bed; got up on Friday morning and decided to have a look into the no start problem. Found the car completely dead.  Charged the battery; plugged it back in and found the brake lights were stuck on.  Unplugging the brake pedal switch the lights turn off. Plug it back in and theyre stuck on again. I tested the switch (continuity test and resistance); all looks good (0-1kohm).  On talking to AVS; found its because of the rubber stopper on the brake pedal; sure enough the middle of it is missing so have ordered a new one. One of those wear items; which was confusing what was going on However when I try unplugging the STOP Light fuses (under the dash and under the hood) the brake light still stays on. Should those fuses not cut the brake light circuit?  I then checked the ECU; FP Speed Error.  Testing the pump again; I can hear the relay clicking every time I switch it to ON. I unplugged the pump and put the multimeter across the plug. No continuity; im seeing 0.6V (ECU signal?) and when it switches the relay I think its like 20mA or 200mA). Not seeing 12.4V / 7-9A. As far as I know; the Fuel Pump was wired through one of the immobiliser relays on the old alarm.  He pulled some thick gauged harness out with the old alarm wiring; which looks to me like it was to bridge connections into the immobilisers? Before it got immobilised it was running just fine.  Im at a loss to why the FP is getting no voltage; I thought maybe the FP was faulty (even though I havent even done 50km on the new pump) but no voltage at the harness plug.  Questions: Could it be he didnt reconnect the fuel pump when testing it after the old alarm removal (before installing the new alarm)?  Is this a case of bridging to the brake lights instead of the fuel pump circuit? It's a bit beyond me as I dont do a lot with electrical; so have tried my best to diagnose what I think seems to make sense.  Seeking advice if theres for sure an issue with the alarm install to get him back here; or if I do infact, need an auto electrician to diagnose it. 
    • Then, shorten them by 1cm, drop the car back down and have a visual look (or even better, use a spirit level across the wheel to see if you have less camber than before. You still want something like 1.5 for road use. Alternatively, if you have adjustable rear ride height (I assume you do if you have extreme camber wear), raise the suspension back to standard height until you can get it all aligned properly. Finally, keep in mind that wear on the inside of the tyre can be for incorrect toe, not just camber
×
×
  • Create New...