Missing badly when idleing with high revs

[aussielyn]

ok my vl commodore has been missing badly , so i have replaced leads.sparks,rotor arm,dizzy,coil, all new and still misses. I had the timing done professionally which had settled down the missing but since a mechanic took a spark plug off to see if it were working the missing has gone bad agan, wat could be the problem?? any ideas
LyN

[rb26dett]

Crank Angle Sensor?

[aussielyn]

ok im no mechanic just a single mum i kno nothing about car motors etc, wats a crank angle sensor and where is it located ? sorry

[mag]

ok im no mechanic just a single mum i kno nothing about car motors etc, wats a crank angle sensor and where is it located ? sorry

Just wait a sec ...

[mag]

Just wait a sec ...

The CAS is in here and looks like this..

http://www.injectorsonline.com/indivprod.php?c=7

[vlpurpy]

is it a manual or auto u might find maybe the water pump could be going or sumthing in the engine itself might be causing the high reving my bfs a professional mechanic i have a vl myself lol

[aussielyn]

no i have changed the crank sensor too its not that

[aussielyn]

ok my firing order is correct and angle sensor is working, im completely annoyed, could a valve be gone?

[rb26dett]

How does it run when you unplug the air flow meter ( It is right near the airbox)

[aussielyn]

ok well i unplug the flow metre and it kinda runs a little beter but it stil misses, but i admit it runs worse wen metre back on, just too scared to leave metre off wen car running, will damage any part of motor doing this??

[VL Berlina 5speed]

well only things i can see which you have not mentioned are,
the fuel system- possibly a blocked injector or faulty fuel pressure regulator.
and the CAS cables.

i have used Mags picture and drawn two big pink arrows, while car is running wiggle one at a time of these plugs, it is common for the cables to brake on the inside and not connect correct, mine was like this and when i moved it my engine would totally die.
if it is either off the cables get a electrician to replace it or if you are able to do it get a good condition one and solder it in.


if not the CAS cable try checking the fuel system side of things, i think there is a way to test the fuel regulator but im not sure, someone else will help yah there hopefully,
as for injectors possibly try a bottle of fuel system treatment in the tank or there might be some other way at the injectors which once again im not aware of.

hope this helps you with your problem and good luck keep us informed how you go with it.

[aussielyn]

nah that didnt help, and it still misses when i run on gas aswell as petrol so i dont think its a petrol problem, i have got all new leads sparks etc. its kinda annoying cuz i sitting at the lites and i think my car is going to shut off as im idleing thats how bad it is

[VL Berlina 5speed]

ahh theres another idea, noticed sensors have not been mentioned,
the tempature and o2 senors affect the way a vl will run as the computer relys on the info its gathering from them to set spark and fuel intake.

the o2 sensor would be a defernat to look at, its on the exhaust manifold near the firewall, screws out.
has three cables running of it.
and the temp sensor is near the thermostat, follow top radiator hose and there should be a plug that is conected to a sensor at the metal housing of the thermostat.
but chance are it wouldnt affect the car to what extent you are discribing.

this dissy you put in is it completely new or did you get a new dissy cap and rotary are put on it? as im still strong thinking it is the CAS.

[aussielyn]

ok the distributor is second hand but the old one was really bad, wen my mate put other one on it was ok till now, new rotor arm new cap

[Goon]

Do u have bosch leads on? try using a better brand..

It made hanges for my misfires on my old baby, i have topgun leads.

[aussielyn]

well yes it is bosch leads but it has been missing b4 i put new leads on so mmmm, im thinking a valve gone maybe now, so i guess no more vl for me

[mag]

well yes it is bosch leads but it has been missing b4 i put new leads on so mmmm, im thinking a valve gone maybe now, so i guess no more vl for me

What state do you live in ???

and still sounds like CAS to me as the way you tell about the idle..

[aussielyn]

perth why

[aussielyn]

oops i ment WA lol well ye any way u kno wat i mean

[mag]

oops i ment WA lol well ye any way u kno wat i mean

If you lived close I could have a look for you but Perth just blew that idea

[mag]

When you pulled the plug on the AFM you said it was a little better but was that on petrol when you did that??

[aussielyn]

nope it was on gas,,, hmmmm i used to live in seaton

[aussielyn]

yes when car is idleing in park or neutral its even worse but in drive it aint so bad, do u think it could be a valve? 12 months ago i got a head reconditioned one put in

[mag]

nope it was on gas,,, hmmmm i used to live in seaton

Seaton hey, try the plug on the AMF when on petrol it should be worse while its unplugged ok

[mag]

Let me know as I'm off to bed