i have an owl in my engine bay
Joined: Jul 2001
Posts: 10,672
Likes: 413
From: Charlottesville VA 22901
Originally Posted by ptrhahn
Fritz, et al:
There are two lines going to the butterfly in the y-pipe... try swapping them, and/or swapping where they are tapped into the nipples that go through the LIM... when I had this problem, it was because these weren't hooked up correctly, and believe me it's bloody irritating.
The TCA is a logical choice too... this sounds like it would be not transitioning to twin mode... mine had the opposite problem of not switching BACK from twin mode, so one run and the it sounded all farty... but not like an owl.
That owl sound is likely compressor surge... so something is pushing your boose back through the turbo, or restricting it from leaving... in otherwords, something ain't opening up where it should. That leads me to think it's the y-pipe, because if it was the TCA, it would just stop making boost in the first place.
There are two lines going to the butterfly in the y-pipe... try swapping them, and/or swapping where they are tapped into the nipples that go through the LIM... when I had this problem, it was because these weren't hooked up correctly, and believe me it's bloody irritating.
The TCA is a logical choice too... this sounds like it would be not transitioning to twin mode... mine had the opposite problem of not switching BACK from twin mode, so one run and the it sounded all farty... but not like an owl.
That owl sound is likely compressor surge... so something is pushing your boose back through the turbo, or restricting it from leaving... in otherwords, something ain't opening up where it should. That leads me to think it's the y-pipe, because if it was the TCA, it would just stop making boost in the first place.
Steve wins this one. It was the TCA. I can't believe I didn't just replace it when he posted but I tested it using my lungs and it seemed ok. Well I guess it wasn't a total waste of time I have Genes old polished manifold some new coils, new solenoids (good condition) and 1 less solenoid to worry about
Originally Posted by gravytraindg
TCA= turbo control actuator? thats a solenoid in the "nest"?
Drew
Drew
Rotary's "R" Us
Joined: Feb 2007
Posts: 54
Likes: 0
From: Rosemount, MN
so did the TCA being replaced fix the owl problem? im dealing with the same problem. to the point where im not getting anyboost at all anymore. my car hoots everytime now even in first at low rpms when boost kicks in at around 2500.
Joined: Jul 2001
Posts: 10,672
Likes: 413
From: Charlottesville VA 22901
Yes in my case it was the TCA and now my baby is BACK! I'll be able to polish off those Hondas when I heading into work mocha in hand and all
Symptom:
boost works when RPMs are below 2500 to 3k in any gear but once you let off and get back into the gas at 3k and above the boost is flat and if you take it to 6k or higher you'll hear the owl.
It began with slowly. Maybe I'd get 3 or 4 pulls with good boost but in the end it was like clock work. Above 3k low boost and the dreaded hoot owl would sound off, below 3k good boost and transition until I let off.
Symptom:
boost works when RPMs are below 2500 to 3k in any gear but once you let off and get back into the gas at 3k and above the boost is flat and if you take it to 6k or higher you'll hear the owl.
It began with slowly. Maybe I'd get 3 or 4 pulls with good boost but in the end it was like clock work. Above 3k low boost and the dreaded hoot owl would sound off, below 3k good boost and transition until I let off.
Originally Posted by yerRx7
so did the TCA being replaced fix the owl problem? im dealing with the same problem. to the point where im not getting anyboost at all anymore. my car hoots everytime now even in first at low rpms when boost kicks in at around 2500.
Rotary's "R" Us
Joined: Feb 2007
Posts: 54
Likes: 0
From: Rosemount, MN
Originally Posted by Fritz Flynn
Yes in my case it was the TCA and now my baby is BACK! I'll be able to polish off those Hondas when I heading into work mocha in hand and all
Symptom:
boost works when RPMs are below 2500 to 3k in any gear but once you let off and get back into the gas at 3k and above the boost is flat and if you take it to 6k or higher you'll hear the owl.
It began with slowly. Maybe I'd get 3 or 4 pulls with good boost but in the end it was like clock work. Above 3k low boost and the dreaded hoot owl would sound off, below 3k good boost and transition until I let off.
Symptom:
boost works when RPMs are below 2500 to 3k in any gear but once you let off and get back into the gas at 3k and above the boost is flat and if you take it to 6k or higher you'll hear the owl.
It began with slowly. Maybe I'd get 3 or 4 pulls with good boost but in the end it was like clock work. Above 3k low boost and the dreaded hoot owl would sound off, below 3k good boost and transition until I let off.
well could it be thee TCA thats retricting me from boosting at all? yeah like i said......i get about 1 psi it feels like from 2500 to like 3000 then i hear the hoot!!!!! its like his for every gear. also since basicly my turbos aren't functioning at all is that gonna damage my motor?
Blithering Idiot
Joined: Jan 2007
Posts: 354
Likes: 5
From: NE Pa
well could it be thee TCA thats retricting me from boosting at all? yeah like i said......i get about 1 psi it feels like from 2500 to like 3000 then i hear the hoot!!!!! its like his for every gear. also since basicly my turbos aren't functioning at all is that gonna damage my motor?
Rotary's "R" Us
Joined: Feb 2007
Posts: 54
Likes: 0
From: Rosemount, MN
Originally Posted by dontlift
That sounds like you a blew an intercooler pipe. Check the pipes (and connections)...
intercooler piping? hmmmm i'll take a look at it. connections? you mean intercooler connections right?
Blithering Idiot
Joined: Jan 2007
Posts: 354
Likes: 5
From: NE Pa
intercooler piping? hmmmm i'll take a look at it. connections? you mean intercooler connections right?
The most common one I've seen is the connection coming loose from the Y-pipe. It's held on with only a hose clamp. (Just behind the air pump, look straight down.)
neat I just found this thread, cause I get the same problem. Maybe I could video record this sound with my lil digital cam can send it in. Funny cause it does sound like an owl. Sucks cause I have to granny shift to get boost.
Senior Member
Joined: Oct 2007
Posts: 453
Likes: 0
From: New Zealand
I had a similar problem years ago and it was something really similar and once I had solved it my car went like a cut cat, not a little cut but one where the cat was held down, cut deep, poked with a stick then let go with dogs chasing it!!!!!
Here was the problem:
I assembled the engines accessories using the Mazda Manual hooking up all the pipes etc in the correct places following the manual step by step. After getting the car going it was boosting and fast but made this funny noise like you were saying. After many failed attemps at fixing it I put my car up next to a mates and pulled manifolds off both cars to check vacuum hoses etc and we found there was an error in the diagram. It clearly shows a three way turbo control solanoid and says connect it up a certain way but you need to have it in the reverse order. Have a look at the diagram that I have supplied, remember check your is in the reverse position to this picture.
I really hope this solves your problem. good luck and let us know
Here was the problem:
I assembled the engines accessories using the Mazda Manual hooking up all the pipes etc in the correct places following the manual step by step. After getting the car going it was boosting and fast but made this funny noise like you were saying. After many failed attemps at fixing it I put my car up next to a mates and pulled manifolds off both cars to check vacuum hoses etc and we found there was an error in the diagram. It clearly shows a three way turbo control solanoid and says connect it up a certain way but you need to have it in the reverse order. Have a look at the diagram that I have supplied, remember check your is in the reverse position to this picture.
I really hope this solves your problem. good luck and let us know
Full Member
Joined: Apr 2005
Posts: 176
Likes: 0
From: Virginia
i have a boost/transition problem... boost under 4500 rpms is 8-9psi, then when i take the RPMs up, i can hear the CRV blow off and hear what i think is the other turbo spin up, but the boost only goes to about 3psi, then when i let off there is this "HOOOOO" like there is a dang OWL under my hood.
basically, whenever i let off in boost over 4500rpm, an owl goes HOOOO, and if i immediately punch it again, the boost still only goes back up to 3psi until i go back under 4500rpms and boost...
am i on drugs? or has anyone else heard of this...
basically, whenever i let off in boost over 4500rpm, an owl goes HOOOO, and if i immediately punch it again, the boost still only goes back up to 3psi until i go back under 4500rpms and boost...
am i on drugs? or has anyone else heard of this...
Good luck
Super77
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