Losing boost at 6400rpm. Help!
- Thread starter suprahero
- Start date
They looked pretty sharp, and the defense was above and beyond my expectations.ForcedTorque;1117834 said:
jdub;1117841 said:Yeah Jay and you NEED your beauty sleep if you're gonna post a pic of yourself
After thinking about how you guys are trying to help me out, I decided I couldn't put you through any Hillbillie photoshoots.................:biglaugh:
I don't really know what type of picture you need of the manifold, but it's harder to get too than I thought. Here is one that I took just to post one, but if it's something else you need, let me know. The manifold is a t4 and my turbo is a t3, but it still seals up perfectly. It hasn't got any exhaust leaks anywhere.
buckshotglass
I love all your sounds.
George is having to evacuate his house at the gulf so he's going to be staying with me for a few days............I know.....he's extremely lucky, except for that whole flooding thing. He's bringing his Stinger and we're going to try it on my car. Hopefully this will help, but I won't know until we try it.
One more thing to add. For some reason, I can't make my boost guage work. It has vacuum to it, although not a lot. When I boost it doesn't read more than one or two pounds. Just thought I would throw that out there. It is an Autometer so it could just be fubar'd.
One more thing to add. For some reason, I can't make my boost guage work. It has vacuum to it, although not a lot. When I boost it doesn't read more than one or two pounds. Just thought I would throw that out there. It is an Autometer so it could just be fubar'd.
hottscennessey;1117576 said:
What I was getting at is:
Did the fuel drop because of the manifold pressure or did the manifold pressure drop because the fuel was cutting out?
The logs that you posted do not include AF ratios - without those it is really difficult to tell what is going on.
If you add fuel where you are dropping off and you are starting to run rich without seeing an increase in power then I would start looking closer at the size of the turbine housing; perhaps you will need a larger one.
Also, where is the pressure sensor for the Stinger compared to the location for the AVCR pressure sensor? Are they both mounted on the manifold?
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ForcedTorque;1117522 said:
Doesnt the engine temp for the stinger run off of the coolant sensor? I cant see a coolant sensor giving that rapid change in temperature as an accurate indication. I dont think thats a good metric to use in this case.
If Jay is using the factory toyota water temp sensor, then I noticed on the stinger that they can be pretty glitchy.. the readings bounce all over the place. I think it's more of the stinger's software than the actual sensor itself. I wouldn't worry about the jump too much. The stingers engine temp is kinda like a hot-or-cold gauge.
The sensor for the avc-r is coming off of the turbo outlet, the sensor for the stinger is running out of the intake.p5150;1118617 said:
hottscennessey;1118764 said:
I am using the stock sensor Scott.
Thaks again to everyone for checking in and offering some suggestions. When George gets here in a couple of hours, I will post up the effects of his Stinger on my car. He also probably knows how to upload the whole datalog instead of having to type in every number one at a time............:aigo:
I installed George's stinger, took it down the road with the wastegate only hooked up, and it does the exact same thing. It boosts up to 18psi and drops to 10 and then comes back up to thirteen.
I"m going to find a sharp object to repeatedly beat my head against.
I"m going to find a sharp object to repeatedly beat my head against.
suprahero;1118765 said:
That is probably the reason you are seeing a discrepancy between the pressure reading of the AVCR and the Stinger. The colder air will be at a lower pressure and less dense (intake) than at the turbo outlet. The AVCR is controlling the boost pressure as it sees; the air is just colder by the time it reaches the sensor for the Stinger.
Im having a really hard time with my neighbors wireless internet connection :naughty: so I cant go back and read this thread again; Im probably missing something so sorry if im talking in circles.
p5150;1118847 said:
I can T it off of the turbo outlet and run it to the stinger and try that out tomorrow. Thanks again Cade.
I'll try it tomorrow John. Thanks for the help.jdub;1119001 said:
I was hoping that was it, but it wasn't. At least we can mark it off as a culprit.IJ.;1119005 said:
I will say this though. I have it hooked up exactly like I had it hooked up on the last build and I never had this problem. Here is a datalog of my last run this morning with wastegate only.
No use T'ing it to the Compressor housing J the Stinger needs to see manifold pressure and vacuum.
Is there any reason you're only opening the throttle to 75%?
Is there any reason you're only opening the throttle to 75%?
I didn't really realize I did it until after I saw the datalog, but remember this is in a not so crowded neighborhood, but it is a neighborhood, and I have to live here. If I had been on the highway I would have floor'd it. I'll do another run or two tomorrow and see if anything changes. I found another very tiny hole in a vacuum line today, and I replaced it, but I doubt it can do what's getting done. It's fixed non the less though.
Would it matter if I T'd into the line going to the stinger from the back of the intake and hooked my avcr up to it and capped off the one coming out of the turbo?
Would it matter if I T'd into the line going to the stinger from the back of the intake and hooked my avcr up to it and capped off the one coming out of the turbo?
Floor the car. The pressure in the intercooler pipes (what the wastegate is running off of) might be different from the manifold due to the restriction of the throttle body plate. But I'm sure that isn't your boost problems (unless you've always been partial throttle boosting it?)
What is your wastegate spring? 13 psi? and what does it run without the boost controller 18 psi? Has it always done this or just with the new manifold/1.5jz
What is your wastegate spring? 13 psi? and what does it run without the boost controller 18 psi? Has it always done this or just with the new manifold/1.5jz