So my air box eploded

EFracer · Post by **EFracer** » February 24th, 2012, 3:10 am

ey guys

i need sum help i got a EF futura dual fuel auto with 2.5 inch zorst was on the way back from crown tonight and there was a hhuge bang..... when i took a look una the bonnet i found my airbox was like cracked and in pieces....
there is just bitz of it evrywhere.. like it exploded.. it starts good and all so i drove it home, just wondering if use guys kno wat it cud be, i dont care bout the airbox cos i was gonna put a pod in anyway but is there a problem i dunno wat to think.. 1 of my mates said the AFM i dunno wat that is cud that be it?

thanks guys
bakem.

kwikxr · Post by **kwikxr** » February 24th, 2012, 4:46 am

Guessing it's a 6? If so, good luck trying to find the AFM, it doesn't have one lol.

I'd say you have had an LPG backfire. Isn't uncommon for it to backfire and blow up/off parts of the intake.

OMY-747 · Post by **OMY-747** » February 24th, 2012, 5:21 am

Lucky that none of the air box went in your tb

Sterling · Post by **Sterling** » February 24th, 2012, 6:25 am

yeah it happens, i replaced the one in my old el and it cracked the day of the roadworthy

just put the podfilter on and it wont happen again.

OMY-747 · Post by **OMY-747** » February 24th, 2012, 6:27 am

I just ran mine with none of the clips hooked up so the lid could just bounce up.

Also to the op, try and write in English otherwise your going to get flamed on these forums.

vegabass · Post by **vegabass** » February 24th, 2012, 6:48 am

I take it you were running LPG at the time?
A back fire means the LPG system and ignition system needs a service. It can be caused by old spark plugs, old leads, a coil that on its way out etc. Also the mixer and converter probably needs a once over.

Just take it to a LPG specialist.

Mr. CVE · Post by **Mr. CVE** » February 24th, 2012, 8:21 am

Would have been an ignition backfire as people said.
Think yourself lucky, there is a guy on these forums who blew his rocker cover apart ! whatever happened to him ??

nothin suss · Post by **nothin suss** » February 24th, 2012, 8:24 am

Yep sounds like its time for some new leads.
A good starting point anyways.

Post by **TUFED6** » February 24th, 2012, 8:28 am

Didn't that rocker cover guy balloon his sump too? Pretty impressive either way

Mr. CVE · Post by **Mr. CVE** » February 24th, 2012, 8:34 am

Usually it is spark plugs and leads.
commodores on gas love to eat air boxes.
champion , and delco plugs are the major culprits. also factory spark gap on gas.

apoc · Post by **apoc** » February 24th, 2012, 9:10 am

What sort of spark gap would you recommend on a ef 4ltr on gas mr cve?

apoc · Post by **apoc** » February 24th, 2012, 9:13 am

Also I get a backfire every now and then. I only have 2 clips on the airbox lid, it just bends them, so I bend them back and back in business!

Mr. CVE · Post by **Mr. CVE** » February 24th, 2012, 9:15 am

apoc wrote:What sort of spark gap would you recommend on a ef 4ltr on gas mr cve?

NGK plugs, BPR6E
If I recall they come pregapped at 0.8mm, leave them at that.
Also if I recall they are V groove.
Accept no substitutes on brand. NGK or nothing.
They are a cheapy plug.

DJV8T5 · Post by **DJV8T5** » February 24th, 2012, 11:55 am

I would do what OMY747 said, leave the clips off the airbox, if you think it needs to be strapped down then use an occy strap on it.
I agree with Mr. CVE on the NGK and 0.8mm gap, that's what I was taught and what I learned. Find out what the standard plug is and gas = 1 heat range colder should be used, which is generally whatever they run in the XR motors (EB/D use ZGR6B-11 not sure on EF/L).
When I got my ED it was on gas...3 airboxes in 2 days...pulled the gas out cos I spent too much on airboxes.

justa6 · Post by **justa6** » February 24th, 2012, 12:05 pm

Shame it didn't lift the bonnet.

nothin suss · Post by **nothin suss** » February 24th, 2012, 5:35 pm

Yeah XR spec plugs seem to be the way to go.

mooseman · Post by **mooseman** » April 18th, 2012, 6:02 am

Old topic I know but some more info on this;

Ford actually started supplying spring loaded airbox clips for dual fuel cars so that when they backfired the springs would allow the lid to pop up and release the pressure and then reseal tightly. Every LPG eseries I owned I would get my brother to grab me some from work.

SnipeZ · Post by **SnipeZ** » April 18th, 2012, 7:00 am

Those springs tend to break also. I found an occy strap more suited

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