Backfire help?

[pauagirl]

Hay all, dis is my first time postinglol!!!!! Ummm.....Anywayz my vp, series2 starts ok then starts to backfire when i accularate, Pls Help?

[pauagirl]

OOOhhh yeh & guttless azzzzzzzzz?

[Vt-Brrrlina]

is your car v6 or v8

v8 - could be rotor, dizzy cap , leads, spark plugs

[pauagirl]

Hi V6, ive changed the sparks! leads! All New. i noticed the fan is not working either? And there is a tapping to? i think that maybe the mainifold lefthand side, ummm why is it so gutless?

[Vt-Brrrlina]

backfiring could be DFI module , coil packs, the fan is only a thermo fan so wont come on til its hot enough to come on - u can test by un plugging it and putting it straigh to your battery to make sure it actually works

[greenacc]

I vote coil, happened to me on the VS - dead coil.

[soop]

Is the lead on properly?

Tapping might be a dead cylinder.

[pauagirl]

Um that make sense? some wot, um can you give me a step by step guide 4 taking the coil off and testing it ummm yeh new to all this thnks. lol!!!

[soop]

Have you checked that all the leads are on correctly?

[pauagirl]

hi there, yep all leads on properlyive just removed the coil pack and put it to the batt/now wotz ment to happen here sory lol!!!!!hehehe.

[immortality]

you need a multi meter to test the coils. you can get em from dick smith on special from $10-$15 normally

[pauagirl]

aaaaaaahhh!!! ok get 1 2moro? Dam i could work thou the night if i had dat chance hehehe!! so illl sit on it tell 2moro then guys thanks so much for your help!!!!!!!

[needwork2-4fillhabbit]

Also check if your water in the top of your radiator has little oil looking bubbles. Just take the cap off and look. May also have a blown gasket.

[pauagirl]

had a look @ dat nah.... no bubble of oil there? thank goodness!!!! Ill check in again 2moro guyz thanks

[soop]

You don't *have* to use a multi meter.

Pull the plug out and see if its sparking...
Don't blow your self up though.

[pauagirl]

lol!!!!!!ill get my bro to do dat 1? hahaa

[immortality]

You don't *have* to use a multi meter.

Pull the plug out and see if its sparking...
Don't blow your self up though.

very rudementry, although it may indicate that the coil is creating a spark, it takes very little energy to create spark across even a decent size gap under normal atmospheric pressure which is not camparible with what is happening in the cylinder under normal running conditions. a better way to do this test would be to remove the lead from the plug in the cylinder and fit onto a spare plug with the gap opened up some. earth the plug against something of bare metal and then crank engine and see if you get a spark. much less likely to create a very sore hand

[pauagirl]

will give dat a try hah:mmmmm 2moro thanks guyz ill let u all no how i go with dat 1, gotta start somewhere