Backfire Intake
 

I got some wierd sound from the intake and some chirp too. I got 16 000km
in 4 months since buying it. The car is out for repair for 2 weeks now and
they can't find anything. It appears that they never saw this!

What do you think?

Watch the video:

https://www.youtube.com/watch?v=-zO_CvbXkv4

if you put the stock intake back on does the sound go away?

That sounds terrible. Figure it out quickly before it ends up being catastrophic.

I wish I could give some pointers, but no idea on that one. Not sure that it's caused by the intake though.

I've not made any mod, so the intake is stock. The only thing that the dealer have said to me in 2 weeks it's that probably too much gas when fire, so
that explode in the intake. They change the ecu, try another injection module. Change my gas and made my oil change just to be sure. They have not open anything in the engine yet. They said to me that absolutly don't know what to do. Good job guys!

I'm not going to watch the video but I can tell you if you have an intake installed without a tune you are potentially damaging your engine.

Watch it, it's worth it.

I can't beleive the dealer let you drive home with that car by the way. This should be fixed.

Just watched it. Oh man.

Post this in the Engine/Exhaust/ECU sub forum

When that happen the first time, i've stop using the car immidiatly. The monday morning i bring the car to the dealer and they didn't have a spair car for me, so they let my drive the car for a weeks. But now it's been 2 weeks in the dealer and nothing new so far.

The sound come just below the 4k rpm but not after. I need to tap the pedal for this to happen, if i go smootlhy then no sound.

Can you tranfert the thread or i need to open a new one ?

It is a stock car! He doesn't have a after market intake. If he did the dealer would say that's what is causing it.

There's another thread here where users are experiencing a similar sound (albeit, a much milder case, and not in multiples like you're hearing). I wonder if they're related or if your issue is indicative of what they can expect from their cars if the issue worsens?

here's the thread in question: http://www.ft86club.com/forums/showthread.php?t=23043

You should bring you car to a different dealer and alert Scion USA right away. That is unacceptable.

I've just read that thread, i will ask the dealer for the HPFP (high pressure fuel pump) issue.

Just to add some info on my problem, i don't have CEL issue either.

I've already call Toyota Canada and they said that until they find what is
causing the problem it's the dealership responsability to diagnostic the car.

I've made a complaint for poor service cause they are not returning my phone call and they are not giving me news for days. I need to go there to talk to the service director.

Never had problem with my Honda for years!

I the good old California we have lemon laws to protect from shit like this.

That does sound like S**T. My vote is that the cam sprocket is FUBAR'd. Only a matter of time until you get a new engine in my opinion.

The sound on that video made the hair on the back of my neck stand up. I would be so sad if my car did that. :cry:
I couldn't drive it like that, it would break my heart every time.

WOW

It might be as simple as the over-pipe hitting the cossmember when the engine rocks on its mounts. Possbly a bad engine mount. I'd want to hear the noise in person and track its source.

):

I agree. It sounds like something is hitting something else when the engine moves because of the revs.


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I'd send that video to corporate and tell them their dealer sucks.

You should have received a free rental and the car should have been repaired.

How about exhaust pipe hitting driveline? They are very close. So many other possibilities. THey need to rev it on the ground and possibly on the hoist to locate the source. Perhaps look for codes.

Any good mechanic uses his ears to do a diagniosis. Perhaps since Toyota is on the hook to pay, the dealer is hesitant to start tearing things down. Tell the guy to get out the stethoscope.

Also, unfortunately at this point the Toyota guys just might not be the most knowledgable diagnosing a boxer.

You should be given a loaner!

That's a intake backfire if I ever heard it.

I just call Toyota Canada and she can't do anything until the dealer have found what is going wrong with the car. I've talk to the dealer and he
said that the scion ingenieer is on the case and they can't touch the car
until he came back with an idea. Yeah sure, will wait another week!

I've asked another dealer to take the car monday morning but should i do it ?

Guy here in Phoenix is having the same problem... No idea what that could be.

Can i get in touch with him to ask some question and share progress!

Thks for let me now that i'm not alone

He is not on the form yet but someone in my group might have his number we are meeting tomorrow I will ask around for you and post back what I find

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I asked and no one had his number if I see him around again I'll tell him to get on and message you.

Sounds like severe detonation to me. Can't be 100% without hearing it in person. Could be a fuel injector that isn't fully closing and allowing fuel to leak into the cylinder on the exhaust stroke.

Does sound terminal for the engine if they don't get it fixed before the piston explodes (if it is for sure detonation).

Fuel getting to the intake and detonating. So, the intake valve must be staying open too long, no? I'm not a mechanic, just using logic. Somehow the fuel must be leaking in during the compression stroke.

Otherwise a fuel injector mis-timed or a leak in the valve maybe? There must be enough leak for hot gas to contact and ignite fuel vapour.

Aside from OBDII perhaps check compression to try and find offending cylinder and maybe check VVTi cam angles.

yikesssss. good luck man seriously.

Could be one of the direct injection injectors leaking fuel in, or a valve problem where it opens early/late, or an ignition problem where it sparks at the wrong time. Could be a lot of things but hopefully they can diagnose it before any permanent damage happens.

OP please make sure to keep us up to date with the result in case this is a factory screw up or an actual failure and in case anyone has future similar issues.

what kind of gas are you using?

sounds like a timing issue

Well if they don't want to service it under warranty- make sure you blow it up before your warranty expires... I wouldn't want to keep an engine thats gone through that much premature wear! Who knows how bad the heads look with all that detonation.

I've got some news. The director finaly gave me a phone call after my call to another dealer of the region and my idiot complaint to Toyota Canada. He's kind of piss of about me because i he's thinking i'm not fair with them ...

Anyway they told me that it's not the exaust and it's not about the air comming into the engine. They tested a lot of electronic part to control the air flow and the injection system. So the toyota ingineer would probalby order to change the engine and ship the old one back to them for further investigation. Finaly after more then 2 weeks they think it's the engine :thumbdown:

And to blame my lack of patience that seems that before my numerous complaint the owner told them that maybe they should pay my month for compensation. So now they are pushing it to me that i was not fair and maybe they will not pay my month cause i've called another dealer and toyota canada ... So we will see what happen really soon.

Thks guy for your support. Hope the best for me.

Wow! I personally would wait until you have your new engine and see if they compensate you. If not phone/talk to "the owner" giving him the option to reconsider compensation. If he's not forthcoming, go straight to Toyota Canada.

Good luck.

Don't let them make you out to be the bad guy.
They totally blew you off and it took a formal complaint for them to take action.

Tell them to shut the fuck the up and fix the car.

Some news after excellent compression and leak test. They tested the injector and the #1 is faulty. So tha't was causing the bakcfire intake.

Finaly after 3 weeks they checked the injector :bow: