VZ Missfire - intemediate
I get a missfire (shakes the entire car) but what is weird is it comes and goes at odd times. It started last week at idle then when I thorttled up to 60kmh it stopped or atleast I couldnt feel it, then after that it didnt come back for another week.
This week same thing happened at idle sitting at the lights, reved up and it didnt come back for the entire drive.
Now it is happening every second day, something is slowy failing.
With my vs this happened i just replcaed the sparks and leads but these new vz's coil packs, sparks taking off the manifold to get to them seams like a mission.
If its a coilpack is there an easy way to tell which one it is? Im guessing i just pull the plug on each while the missfire is present at idle.
Is there anything else that could possibly be the cause other than coilpacks and plugs?
Last edited by elshonno; 15-11-2011 at 11:00 PM.
P-plater
As you said its a good idea to isolate which cylinder it is, when it starts missing pull the leads to the coils 1 by 1, when you find one with no appreciable difference, that's your culprit.
Then depending if money is worth more than time, change your spark plug on the suspect cylinder. Still happening, change your coil. The only thing I can think of that could cause a miss after that would be an injector. Very frustrating to take the fuel rail off the injectors as the o-rings don't want to move, I know cause I did all my coils and injectors on Friday.
I've read in some threads that you can test coils with a multimeter, that will need some research.
Originally Posted by Little Red VZ Go-Kart
1. Why would you want to floor it, or move it to the red line? Especially with the lack of airbags and ABS features!? What do you hope to achieve by that??Originally Posted by HoldenV8
give everything a spray with wd40 wheels brakes that should fix the squeaks
Replaced all the sparks and coils, still misfiring.
Next is the injector cleaning but Im not very confident.
P-plater
I bought injectors for $220 on eBay. Might be easier to do that. Also guarantees that the injectors arnt the issue. After that its worth taking it to a shop, at least they won't stuff around with the parts you already changed.
Originally Posted by Little Red VZ Go-Kart
1. Why would you want to floor it, or move it to the red line? Especially with the lack of airbags and ABS features!? What do you hope to achieve by that??Originally Posted by HoldenV8
give everything a spray with wd40 wheels brakes that should fix the squeaks
I noticed a tear in the rubber connector (underneath, it was hiding from me) on the throttlebody - shown in this picture, could this be causing it?
That's your purge hose, not as cheap as they look. Lol about $75 from Holden for just the hose.Originally Posted by elshonno
Try and seal up the leak on the hose by using some duct tape or electric tape to see if the issue goes.
If it does then u can replace the hose or just keep the blk duct tape on.
This hose shouldn't have an adverse affect like the ones mentioned in the first post but see how you go.
Where the coils you bought brand new or used?
Should cost you $550+ for a brand new set.
Also,
What plugs are you using in there.
U should have the NGK PLATINUM LTR6AP-11 of the top of my head.
Dave.
Check out My WL CAPRICE
http://forums.justcommodores.com.au/...price-l-k.html
Hey Dave,
I have the same plugs you mentioned, I also picked up the coils for $60 from repco they are the fuelwiser brands.
I put some tape over it but your right it didnt have much affect.
This misfire is starting to give me the shi!ts, today it wasnt happening for the first 20 minutes then im sitting at the lights and bang it comes back again, I bet next time I start the car it's gone.
Im just trying to avoid spending any more $$$ - theres not alot of that around atm.
Not really sure about those coils???
Where abouts are u located?
I have a set of coils you may be able to try out if u like.
Also not sure if this may have an adverse affect but make sure you have plugged in the vacuum hose on the back of the manifold with the one way valve. (drivers side).
They can sometimes fall off.
And make sure that the plug on the back of the manifold is on properly.
Keep us updated.
Dave.
Check out My WL CAPRICE
http://forums.justcommodores.com.au/...price-l-k.html
just got hold of a scan tool,Not really sure about those coils???
Where abouts are u located?
I have a set of coils you may be able to try out if u like.
Also not sure if this may have an adverse affect but make sure you have plugged in the vacuum hose on the back of the manifold with the one way valve. (drivers side).
They can sometimes fall off.
And make sure that the plug on the back of the manifold is on properly.
Keep us updated.
Dave.
got error codes p0206
and p0306
all pointing to the injector on cly 6.
It did mention something about coil pack circuit 'f' or something but i didnt write the complete message down.
Booked into the mechanics up the road tomorrow for testing the cables, I will swap over the injector tonight to see if it misfires the cyl i put it into
Put in some repco fuel injector cleaner in the tank, went for a good 30 minute drive and the misfire stopped while driving.
Howz that $11 bottle solved my problem - fingers crossed.
The misfire was intermittent before so it might come back, if it does I am sure its the fuel injector now so Ill order a set form ebay and replace them.
yea that hose end is a bit cracked as in mine too, i just put some silicon over it as a tempory measure, will replace when i change the plugs, as to replace the hose , the manifold as per plug change needs too come off ,, $80 bucks for a piddly two dollar hose,
update
misfire is happening again.
What I have done so far
Error code 0206 & 0306 - Indicates Cyl 6 misfire and injector problem
New spark plugs
New coils
Swapped over fuel injector from Cyl 6 to Cyl5 - Cyl 6 still misfires
NFI what to try next, I have read some places it could be the ecm - praying to god its not that.
Has anyone got any ideas of what to try next?
Can a vacuum leak cause misfire while running or just idle?
Any help appreciated I am truly stuck up shit creek without a paddle atm.
Last edited by elshonno; 16-11-2011 at 11:14 PM.
You would be able to check for an open circuit, short circuit and read the resistance of the coil with a good multi meter or a megga
Faaaaaaaaaaaaaaaaaaaark Holden!
6 year old car and its the ECU ###ed up bs
My VS has been put through more shi!t than this and it is still going, must me made in china crap.
ECU? Just get an aftermarket one tuned to your car lol. Would be cheaper :P
hmmmm this is bs, this is exactly what is happening to mine, let us no the damage
they tell me it was 300 labour to diagnose the fault which was testing all connections, fuel injectors and wiring. They also had to monitor the sensors on the scan tool to make sure it wasnt a sensor.
1200 to replace the ECM, apparantly a guy comes to the workshop and calibrates the ecm - Holden dont have to do it like ive read in some other posts around.
I dont know if this is reasonable price or not I havent really heard from other mechanics what they charge, I guess the hard work was put into diagnosing the problem which is the ####ed part.
Il let you know what its like when i get the car back tomorrow, if its still there Ill probably run the mecahnic down.
Just got it back - all good now.
If anyone is wondering about the symptoms, I can say that I noticed for a months at idle there would be a lsight misfire, maybe 1 or 2 bareley noticable other than a little shake of the car. If this starts happening your ECM is on its way out. They are poorly made pices of crap on this model.
As I said my 95 VS has laster all these years and is still pearlin'
I feel sorry for any other sucker out there that becomes a victim of Holden's VZ ECM BS.
I am now one of those suckers!!!
Thanks for all the suggestions and help.
P-plater
I have the same thing mate, I changed the coils and injectors trying to get rid of the miss.
So how much was it to fix? Did you replace it or calibrate it? And can it be done at a dyno tune with vcm suite as I am going to get it tuned soon.
Originally Posted by Little Red VZ Go-Kart
1. Why would you want to floor it, or move it to the red line? Especially with the lack of airbags and ABS features!? What do you hope to achieve by that??Originally Posted by HoldenV8
give everything a spray with wd40 wheels brakes that should fix the squeaks
hmmm that sucks, intrested in the answer to the above question though.
1500 bucks all up. Only a few people have the software to reprogram/calibrate the new ecm. My mechanic called him out - he charged me 900 for the ecm module and 238 for the labour of prgramming it. If you want it retuned youll probably have to spend another 400 getting that done.
MY car is running nice now after all the shit i did to it, Im waiting to see if there is any fuel consumption imprivement from the new ecm, the car was churning through fuel pretty quickly beofre.
P-plater
Did you notice any power changes across the range?
Last edited by CRUSTIN; 19-11-2011 at 10:54 PM.
Originally Posted by Little Red VZ Go-Kart
1. Why would you want to floor it, or move it to the red line? Especially with the lack of airbags and ABS features!? What do you hope to achieve by that??Originally Posted by HoldenV8
give everything a spray with wd40 wheels brakes that should fix the squeaks
Mine is doing it too... Argh. I dont wanna pay for a new ECM. Mate how many kays did your car have before the replacement?
just a quick update,
ended up biting the lead and took my car to holden,
turns out all the above symptoms where due to a cracked plug, derrrh ultra tune
plug was only 5000km old wft
lucky it was only that:-) did they cracked it when putting it in then?
My car was on 112 k.
It might not be the ecm there is every chance you can eliminate what it is, here's what I did in order
Pull each plug from the coilpack one at a time, when you pull the one out with the problem you will notice no difference in idle - all the others will nearly stall the engine.
Once you find the cyl misfiring you need to swap the coil pack with another cylinder
If that doesnt work put in a new spark plug
If that doesn't work swap the fuel injector with another cyl
If that still ain't working you need to check the plug receives a pulse
Trace the wiring back to its source and it'll be the ecm
1200 to replace:-)
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