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The VFAD line/nipple is a bit toward the front of the car from there. Maybe 10 cm. Pointing down, just like that one. I think you can actually see it in the picture in my post above, with the green/white thing on it in the background.
Is your car a 4port or 6 port? In other words the 231hp version or 192 hp?
When your crappy intake was installed ........... they would have removed the vfad ...so that hose with the green thing on it goes to a valve then to another hose then to the vfad (which is no longer there ) so ..... if that wasn't blocked = VAC LEAK
When your crappy intake was installed ........... they would have removed the vfad ...so that hose with the green thing on it goes to a valve then to another hose then to the vfad (which is no longer there ) so ..... if that wasn't blocked = VAC LEAK
Im gonna call Mazda tomorrow and ask them to put the old original intake back, i still have it. Yes the green hose goes to the k&n filter then through and somewhere i can't follow. Would you guys agree thats probably where the problem lies? I have a 6 Port 231bhp
Im gonna call Mazda tomorrow and ask them to put the old original intake back, i still have it. Yes the green hose goes to the k&n filter then through and somewhere i can't follow. Would you guys agree thats probably where the problem lies? I have a 6 Port 231bhp
Yes ...the problem is probably twofold
1/ the intake itself
2/ the vacuum leak
Plugging the vacuum leak will def. help /perhaps fix the issue , but I would still put the stock intake back on even if it does.
Im gonna call Mazda tomorrow and ask them to put the old original intake back, i still have it. Yes the green hose goes to the k&n filter then through and somewhere i can't follow. Would you guys agree thats probably where the problem lies? I have a 6 Port 231bhp
So the "somewhere I can't follow" may be where it's loose. It depends if whoever installed the intake kept the VFAD or removed it. If you tug on it, does feel attached to something or loose?
So the "somewhere I can't follow" may be where it's loose. It depends if whoever installed the intake kept the VFAD or removed it. If you tug on it, does feel attached to something or loose?
Delivered the car to Mazda today, explained the situation.They will put back the stock intake and check for vacuum leak.
Im wondering about the plugs, dont they show a rich condition in the engine ? This is the last check i did before i delivered the car. Seems like leak has increased.
Yes those plugs ran pig rich. Here's what I feel is the situation from the observations so far
- MAF g/s is low, so the car is getting air through a vacuum leak, OR the MAF is crazy OR the K&N intake is throwing off the MAF reading (which can happen)
- LTFT is high, meaning the front 02 sensor sees a lean mixture and the computer is adding fuel to compensate. This is consistent with a vacuum leak OR the O2 sensor is crazy
- spark plugs ran very rich, meaning the car has spent a lot of time running cold and idling OR both the MAF AND O2 sensors are crazy and there is no leak or lean mixture, but the car thinks there is one, OR multiple fuel injectors are injecting more fuel than they should.
As you can imagine those last 2 scenarios are pretty unlikely.
Yes those plugs ran pig rich. Here's what I feel is the situation from the observations so far
- MAF g/s is low, so the car is getting air through a vacuum leak, OR the MAF is crazy OR the K&N intake is throwing off the MAF reading (which can happen)
- LTFT is high, meaning the front 02 sensor sees a lean mixture and the computer is adding fuel to compensate. This is consistent with a vacuum leak OR the O2 sensor is crazy
- spark plugs ran very rich, meaning the car has spent a lot of time running cold and idling OR both the MAF AND O2 sensors are crazy and there is no leak or lean mixture, but the car thinks there is one, OR multiple fuel injectors are injecting more fuel than they should.
As you can imagine those last 2 scenarios are pretty unlikely.
Update, so far they havent fitted the old intake, since they are missing a hose, but its going to be done in a couple of days. I was told the mechanic so far could not find any leak, and since they dont have an error code to go on, it was hard to diagnose . I told them the car gets rather hot and smells badly of oil. One would think that the odb2 readings would help hehe.
Yep smells of oil after 10 min drive. Will take till the end of february for Mazda to get the hose and small parts. I wont be driving it until its fixed and those readings normalize.
Yes those plugs ran pig rich. Here's what I feel is the situation from the observations so far
- MAF g/s is low, so the car is getting air through a vacuum leak, OR the MAF is crazy OR the K&N intake is throwing off the MAF reading (which can happen)
- LTFT is high, meaning the front 02 sensor sees a lean mixture and the computer is adding fuel to compensate. This is consistent with a vacuum leak OR the O2 sensor is crazy
- spark plugs ran very rich, meaning the car has spent a lot of time running cold and idling OR both the MAF AND O2 sensors are crazy and there is no leak or lean mixture, but the car thinks there is one, OR multiple fuel injectors are injecting more fuel than they should.
As you can imagine those last 2 scenarios are pretty unlikely.
So engine is probably running rich cause ecm adding fuel due too vacuum leak?
I suspect that's a big part of it, but it should only add enough fuel to compensate for the leak, not more. So something else may be in play -- potentially that intake is further offsetting the MAF signal.
I suspect that's a big part of it, but it should only add enough fuel to compensate for the leak, not more. So something else may be in play -- potentially that intake is further offsetting the MAF signal.
Ok thanks, i will leave it with Mazda until the readings are normalized and all problems are fixed. Hopefully its just leak + intake issue
So the dealer received missing parts earlier than expected! Just got my car back yesterday and WOW what a difference after refitting old intake:
Strange noise at high rpm is gone
No more hesitation at high rpm
The oil smell still there but barely present
O2 ring still glowing after rough drive
Engine power back to 80%-85% id say!
So definetly there was a vacuum leak! Here are the readings after some rough driving (30 min) Really happy about the numbers, but LFT1 still fluctuating between 3,1% and 7%. I was hoping for 0-2%. What is considered normal for rx-8? Seems there is still a small issue.
Maf is still too low which could be something simple like a worn out ssv bushing- which is hella expensice to fix . If car runs and drives well , it might pay to leave well enough alone.
Awesome. So they replaced the intake with stock? Everyone with the Typhoon garbage needs to read this thread.
The last bit that concerns me is the O2 ring glowing. That's NOT ok. Your cat temp looks within spec, but I remain concerned that your catalytic converter is blocked. Don't let them tell you it's fine until they have taken it down and examined it. They won't be the ones paying for a new engine if you let this continue.
Maf is still too low which could be something simple like a worn out ssv bushing- which is hella expensice to fix . If car runs and drives well , it might pay to leave well enough alone.
What numbers should Maf show ? Loki yeah, I'll force them to take down the cat and check it properly. Yep good old stock intake now. Thanks for all the help so far, really appreciate it!!
Awesome. So they replaced the intake with stock? Everyone with the Typhoon garbage needs to read this thread.
The last bit that concerns me is the O2 ring glowing. That's NOT ok. Your cat temp looks within spec, but I remain concerned that your catalytic converter is blocked. Don't let them tell you it's fine until they have taken it down and examined it. They won't be the ones paying for a new engine if you let this continue.
They made a full inspection of the cat and could'nt find anything wrong. I told them i want confirmation from mazda hq that glowing ring is normal, if something happens they'll be responsible. Chief mechanic said i will get written confirmation 😁
01-30-2018, 05:32 PM
. I told them the car gets rather hot and smells badly of oil. One would think that the odb2 readings would help hehe.
and check it properly. Yep good old stock intake now. Thanks for all the help so far, really appreciate it!!