vt not running good done everything

[2000vt]

hi all

having problems with my vt commodore. Took it for a 160km trip to go christmas shopping, hit the 80km sign backed off to come down to speed as i hit the first roundabout i had to stop for a car it was then that i noticed the car surging and chaff cutting. As there is a mechanic at the roundabout I stopped in there and asked what he thought, he took off the iac connection and as the car didnt stop or stall he said that this was the problem. As i was not able to buy one that day, I cleaned the one I had very throughly and stuck it back in with no difference. I then took it down to my local mechanic who put the scantool on it, it came with codes 15,16,22,23,29,32, . Now it being xmas wasnt able to get any new parts so what I have done is this, have cleaned all sensors with electrical contact cleaner, have replaced coils and dfi plate with different going sets no difference, cleaned fuel filter u guessed it no difference, checked for vacuum leaks breaks in the wiring, had injectors out cleaned inspected reinstalled, the list keeps going i have spent 5 days trying figure this one out and still no luck. what i want to know is if one sensor goes do all of them and with the codes should i just replace all sensors. Im starting to think this one might be computer???? Any advice, help, suggestions will all be greatly appreciated

thanks everyone

[2000vt]

sorry its a v6 non supercharged sedan

[scvs6]

Hey mate, there are two problems that I can see when looking at this post.

1. It's in the wrong section, it's mean't to be in VT - VX Holden Commodore (1997-2002).
2. You can't clean a fuel filter. Did you mean air filter?

Here is the link so you know what the fault codes mean for your car: Checking Error Codes VT - VX.

[2000vt]

thanks mate not computer literate yeah took the fuel filter off and blew it out to see how the fuel was, there was little specks in the bottom of the dish that was spotless dont know if that means anything looked harmless. I have tried just about everything on the threads but nothing seems to be working is there anything anyone can think of outside of the square frustrating the hell out of me

[edals]

OK< so thats a few fault codes. disconnect your battery for a minute, reconnect it and check the codes again mate, this will just find the main fault sensor first.

[lout]

like edals said dis-connect battery and see if they are old codes or current codes
check your engine earth wire
unplug and reseat the 3 plug connectors in RH corner of engine bay under windscreen

[2000vt]

thanks will do right now

[2000vt]

ok so disconnected batt redone error codes and today all im getting is code 12 of course and code 16 which is coolant temp sensor i have swapped it out for a brand new one . I did discover though that it could be number 3 injector, i checked it the other day and they were all good took all leads off and the car reacted badly but i thought id see what happened today. took number three injector lead off and there was no change in the car, I then took out the spark plug which was brand new and it is black even the white part of the plug is black. this is the same for injector 5. Makes sense to me now because i thought i was missing a cylinder or two but I was convinced it was spark as the norm for these cars do you guys think that this could be my problem

[lout]

swap number 1 and 3 injector and see if problem moves
I would think it is plug not firing though
remove plug and re-attach to plug lead then have someone crank/start car
using something insulated hold plug near clean metal and see if you are getting spark

[2000vt]

thanks lout will do tomorrow ran out of daylight today and dont have any work lights either. I know someone that has a vs wagon wrecked going to see if I can get coils and injectors, this bloke is into scrap metal which I have plenty of so probly get them for free and get rid of some rubbish hope this will fix my problem

[Not_An_Abba_Fan]

Is there a black ring around the base of the ceramic part of the plug? I would say lead if that is the case. But as said above, swap plugs to a different cylinder first and see if the miss changes cylinders.

[2000vt]

yeah there is a black streak wouldnt call it a ring though on the ceramic part plugs

[Not_An_Abba_Fan]

A black ring at the base of where the lead finishes generally indicates that the lead is stuffed. But to eliminate that, swap the plug from the missing cylinder to another one and see if the miss moves too.

What I usually do is pull the lead off the plug slightly while it is running, you should hear the tick of the spark as it jumps from the lead to the plug, if the miss is still there or goes away while you are doing this, then it is the plug that has failed. If you don't hear the tick, it is the lead.

[2000vt]

thanks not an abba fan yeah sorry mate but misunderstood you the ceramic part of the plug is clean as the part that goes into the motor was black as and as said brand new plug. didnt have chance to do anything today had to work but putting in a full day tomorrow want me car going, dont know how much you take it for granted till its stuffed

[vn_v6]

it is normal for the part that goes in the motor to be black. thats not a problem

[2000vt]

thanks vn_v6 when i checked the rest of the plugs they were a nice greyish color this one was jet black and so was plug 5

[VTS5]

this one was jet black and so was plug 5

Wet (oily) or dry??

[2000vt]

they were both dry but black

[2000vt]

turned out to be injectors

[2000vt]

wasnt injectors still working on it

[Cashman_309]

Have you done all the usuals?
Check ALL vacuum lines.
Clean MAF.
Replace Fuel Filter. (Blowing through it isn't the same thing).

[2000vt]

yes done all the usuals, even got new injectors. Fuel filter is fairly new anyway have cleaned all sensors. I have spark, fuel and air ,pulse at the injector leads . could it be oxygen sensors they didnt come up with the scan tool or checking them myself????maybe computer ????? Dont know all out of ideas

[Cashman_309]

What I usually do is pull the lead off the plug slightly while it is running, you should hear the tick of the spark as it jumps from the lead to the plug, if the miss is still there or goes away while you are doing this, then it is the plug that has failed. If you don't hear the tick, it is the lead.

Did you do this?

[2000vt]

yeah done that getting spark

[Cashman_309]

HMMMMM quite the pickle this one.

Check air intake hose for fine splits or holes.
If that comes up good then get your fuel pressure checked, at this point its either fuel filter, pressure regulator or fuel pump