Markie

Done some voltage checks today.. Seems like the sensor is feeding back voltage correct. With ignition on I had 2.4v Idle about 3.4v Disconnected FCD just in case it was that but still the same problem and error 35. Anyone got anymore idea or is it possibly ECU ?

Just read a bit more.. If it's a FCD problem, would the ECU still log the fault or would ECU see all is well as the FCD is just an add on? I use a HKS FCD. What I think I am trying to say is that does the signal from the Turbo Pressure Sensor go back to the ECU via the FCD?

Update.. Had a Turbo pressure sensor from Brad. Try it this morning, still the same.. I have not reset the ECU yet, but I don't think it's gonna matter. But I will and see if I still get the Error Code 35 What I did do though from reading another Supra forum is test the voltage to the sensor which is meant to be about 4-5v and mine is showing 4.8-5 so does this mean the wires and ECU are fine? It is starting to look like a Toyota diag now Don't know if it's me, but the engine temp does not seem to reach it's usual temp, it seems to run a bit cooler going off the gauge. Car still idles fine and seems ok at normal running. When Turbos seem to get more involved though it does start playing up again. Would O2 sensor gone cause it? I did not think so as it was an instant problem from all fine and we'll and the next second, problems and very noticeable problems. Not like a more subtle misfire/splutter I have had before when O2 sensor needed changing,

Holy shit... How can this small unit be so expensive! Just removed it to have a look and there is nothing to it.

Nice one bear.. Will do.. On a side note.. If the issue is the pressure sensor, would my boost dials not being reading correctly, because a moment they look fine.

Not impressed with these lot this year.. What has happend to them! Moved the misses car to Tesco and saved £300; not only that, the mix up on the phone when trying to speak to them was if not annoying comical.. Not only do they now want £50 admin to cancel even when in my 14 days cool off period thing, they also will only cancel if I send a letter in to prove it is actually me! Seriously, who is gonna impersonate me and cancel my insurance and have to pay £91 in the process of their own money? Crazy! If anyone gets close with a quote for the Supra this year, then that will be moving away from these as well. Shame!

Spoke to Toyota who are after £260 for this little sensor. Does anyone have one spare I can borrow or buy? If it was like £30-40 I would just get and try, but its a tad expensive if it is actually not the issue. Was thinking of getting Toyota to do a diagnosis to double check, but not sure how much that is...

Nice one.. Thanks. This is prob the cheapest and easiest thing to try first.

Is the Turbo pressure sensor the one above the turbos and where the air intake pipe comes into the top before it goes into the turbos..? Is there only one as well?

Rightio.. Done some stuff. o Opened up ECU. No sign of scorching or burn. No smell either. Refitted. Still the same. o Cleaned Air Cone and Air Sensor. Refitted. Still the same. o Disconnected battery - It does not enter limp mode, no engine light or warning light either. - Idles fine - Seems to be ok lowish revs aswell, but then start cranking it up a bit and you get mis-fire/stutter. I feels like when I needed to change the O2 sensor and you can fele it mis/stutter. This though is a much more violet noticeable affair. I get the feeling its not the ECU, but after clearing the codes I still get the same one greeting me when getting home (Error 35) Error 35 (Turbo Pressure sensor circuit) is what I found now, no idea where I got HAC from, seems there are a few screen shots for the Supra where the same codes mean slightly different things.. Anyone know what I can check for this error? Could it just be a Turbo sensor gone wrong. Where about is it in the bay? Got the feeling there are more than two?

Just been doing some reading.. From what I gather the HAC/Barometric sensor is in the ECU. Flow charts asks if there are any other codes, if answer yes continue, if answer no, replace ECU or ECM as they refer to it off the PDF I was reading. Any ball park figure for a 98 VVT-i second hand one?

Weird.. As error 35 in the error code manuals refers to the HAC sensor/circuit

Anyone got any pointers on this one?

Has anyone got experience with these? What do they do and where are they located? Suddenly getting shutter and misfire tonight on way home.. Reset fuses etc and the error code I had when getting home was 35. Used the VVTi E1 TC wire trick to get the code.. Any ideas please? I thought it could of been the Wynns injector cleaner I used the other day in the fuel, so filled tank hoping if it was that it would dilute it.. It's been working for days since adding it to the tank though.

Any clues on where the low side port is on a 98 TT VVT-i? I got a bottle of this EZ Chill I am gonna try.

Thanks Chris... Any pointers of where exactly these "pots" are so I can do some basic checking? How did you come to these units from the error codes.. They sound like two different things.. Ahh these things? throttle body potentiometer I'd hope it's not loom

Yeah defo 35 and 89 then... Is that sensors then looking at the codes or? Was hoping the code would be something more like replace this or replace that

You've lost me :-) I can't recall a pause between numbers at all.. I'll re-check

Just read the codes off the car.. Getting 3589 pause 3589 pause etc etc Anyone know what the codes are? Is it code 35 and 89 or is it 35 89 times its been flagged?

Would it be MAF sensor cleaning as well? Or do you think Throttle Body? I was wondering if there is a FBW sender unit or something which is known to play up. Thinking about it, the other day it did start reving higher than normal tick over when just left running for a few minutes.. Like as if the AC had been turned on.

Yeah, TT VVTi Sure there used to be a code trick you could do even with the VVTi's but its been years since I tried that. Code thing for using the engine management light and the diag socket.

Hi all, Had the problem twice now. Car will start but engine management stays lit and even with pedal full on I get tick over revs.. Turn off and try agai. And things back to normal.. Any ideas? Is there some FBW sender unit or something that can play up or go?

Nice one.. Thank you.

Asking if Chris still does this. Does it matter how old the thread is?

This service still offered Chris? I am fed up of mind just blinking red at me because its not connected!