sierrafery
Well-Known Member
He says 1.22 bar shown by nanocom... better read again post 13...
sierrafery
Well-Known Member
For future reference, "turbo pressure" shown by nanocom instrument mode is in bar calculated by the ECU (MAP - AAP)... it's -0.02 at idle cos the pressure in the manifold is a bit lower than in the airbox, 1.22 shown there is boost not gauge pressure .... the OP's problem at this point seems very like a slipping clutch to me
raywin
Well-Known Member
Reading the first post it says 1.22 bar at full throttle.
As mentioned this is a boost of 0.22 bar gauge.
But then its mentioned that at the waste gate feed pipe a gauge reads 15 psi.
Could it be the MAP sensor is duff?
sierrafery
Well-Known Member
I think you refuse to understand the obvious which i thought was clearely explained: 1.22 SHOWN BY NANOCOM INSTRUMENT MODE IS 1.22 BAR BOOST (18psi) while at the wastegate was 15 psi which is normal as the pressure drops a bit in that thin pipe
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raywin
Well-Known Member
Easy boy, I'm not refusing, just confused here.
Is the 1.22 bar absolute pressure as read by the ECU from the manifold pressure sensor?
That was my understanding of the reading.
1.22 bar absolute would be the same as 0.22 bar gauge pressure.
Absolute pressure is measured from zero, so at a standstill you would expect <>1 bar being normal atmosphere pressure.
If you plug a pressure gauge into the bypass line it will usually read gauge pressure (this starts from 1bar) in this case 15 psi which seems pretty close to what you may expect,
In absolute this would read <>2 bar.
sierrafery
Well-Known Member
Read again post 13 and see the pic of nanocom "Turbo pressure" in post 22, the OP has 1.22 in that slot, sorry, i can't explain clearer than that buddyraywin said:
Interceptorxj
Well-Known Member
Have you unplugged your MAF sensor and tried it?
Turboman
Mab An Gov
That would seem to fit the description.
However, I would expect that OP would notice the revs rising when the vehicle speed wasn't.
And that there might be a smell from the clutch slipping at speed.
And usually when I have seen slipping clutches it is obvious when you pull away from a standstill.
sierrafery
Well-Known Member
For a fubar clutch yes but if it's just at the beginning it can slightly slip just uphill under load, i've seen that myself... though the IAT, ECT and FT readings would be relevant too.
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Discodevon
Well-Known Member
As someone said above, unplug the maf sensor and try it then
Discodevon
Well-Known Member
Are injector seals and washers worth changing if you know they haven’t been done in 89k?
Woodcote
Member
Should have mentioned earlier that it's a new MAF that is fitted as that was one of the first things I tried, my old MAF is still in working order so I doubt it's that.
I've decided I'm going to change the radiator and intercooler, the thermostat and coolant and when I do I will check all the hoses to and from the Turbo.
Really I could live with it but it's just annoying
Thanks for all your replys
Stevie
I've decided I'm going to change the radiator and intercooler, the thermostat and coolant and when I do I will check all the hoses to and from the Turbo.
Really I could live with it but it's just annoying
Thanks for all your replys
Stevie
