Just looked at my engine today, and found that this would open.

Never noticed it opening before, what is this part and is it suppose to be like this?

If it helps my car is a Magna TL '03, Dual Fuel.




http://macko.me/images/photo.jpg

Haha no, its not. Remove the resonator and replace with a rubber plug of the appropriate size. Available from clark rubber.

Atm your car is gonig to be running lean its its getting post-afm air.

Or if your tight and like lipton iced tea, use the lid from that ;-)

cheers. yes, car has been running like a dead dog lately and finally had some time to look under the engine. hopefully it fixes it :D

No it shouldn't open
replace it if you want to keep it stock
remove it and clamp an appropriately sized plug in there if you don't mind a bit more noise
either way, it has to be sealed from air entering the intake anywhere past the air flow meter (that box with the sticker and 338 on it in the pic)
Also check the smaller one underneath the intake on the other side incase that split too.

just put a milk cap in hole and is all good

lol First time I've seen one do that! Must check mine, just in case. And add it to my list of regular checks.

EDIT: It's called a resonator, keeps the intake from making too much of a roar when you put your foot down.
Have you had any backfires lately? That could be why.

Have you had any backfires lately? That could be why.

was on the highway and pushing it and it was backfiring as if it was out of LPG, which was half full.

i found the best plug for these is a 40mm brass welsh plug and a clamp. wont brake down with engine bay heat like plastic bottle cap will...

i found the best plug for these is a 40mm brass welsh plug and a clamp. wont brake down with engine bay heat like plastic bottle cap will...

Yep. That way, next time it backfires, he will get a dent in his bonnet. Not Kool!

i found the best plug for these is a 40mm brass welsh plug and a clamp. wont brake down with engine bay heat like plastic bottle cap will...

I have done this, but my system is not prone to backfiring, not that the brass plug will ever turn into a projectile, but a dented bonnet will tell you if it did, cutting a 40mm disc out of ABS plastics is easy and cheap, and you can also put the resonator back afterwards on so no-one knows any different.

This is typical, though small, damage from a backfiring LPG mixer system. Most of the time you'll lose the lot including the MAF sensor.
Do some research, you may have a problem, a breakdown waiting to happen or perhaps worse/perhaps not.....However, do your research, this does happen from time to time on LPG mixer models, I have NFI what causes it. But its the reason I chose the system I have...

McCormicks spice jar lid :)

McCormicks spice jar lid :)

Are the right size, but not built to withstand underbonnet temps, make it yourself, out of the stuff the other under bonnet plastics are made of, ABS plastics, you could even cut one out of the broken resonator pictured in hand, then reclamp.

solid aluminium plug? http://picturestack.com/658/145/Wd61002972p0C.th.jpg (http://picturestack.com/658/145/Wd61002972p0C.jpg)

Better to go to the wreckers and pick a few of these things up. At least it rupturing on backfiring - if that is what happened - protects other more valuable parts of the engine's intake.

If your LPG car is backfiring you have an issue. If you have a misfire on Petrol you may not even notice. If you have a misfire on LPG you get back fires and blow things up. Worse case you blow up airflow meter or put a dent or whole in the bonnet when arbox explodes.

I would be spending a few dollars to rectify this. If your gas system was added to an used car(not brand new car) you should of changed plugs, leads, coil and dizzy. Misfires are magnified on LPG by many times over petrol.

I would be spending some money on your car ASAP to fix the back fires. Put a new set of plugs, leads and a new dizzy cap on. If the car then still isn't running right get it LPG tuned. From there coil is all that's left and most likely not the issue. Coil is expensive so unless you want to lash out on the dough I would rush into changing it.

Petrol can have a fuel-air mix to go boom all the way from the valve to injector.
LPG mixers have a fuel-air mix to go boom from the valve, all the way back to the mixer ring. If you still have backfire issues, definately keep the resonator chamber on there as a weak point. Tape it up to stop air leaks if you have to drive on that one, till you can get one from a wreckers. Check the bottom one too.