Thread: TD5 EGT

A wide range MAP is brilliant enhancement corroborated with proper remap but it will not stop an "air flow high" fault code cos that's logged when the ECU cuts fuelling if the MAF reading exceeds 680 kg/h , the wide range MAP is good instead of a boost box to keep the management working on real data not on fake MAP readings, would not help Jazzman with his particular issue

there is a MAF sensor which fits and has a different translation curve so it might not exceed 680 but can affect response at middle revs if the fuel map is not addapted to it, it's used with proper remap and has good reviews, part nr 5WK9605, 5WK9608, 5WK9605Z, 13621432356

I connected my boost control valve again to test if it was actually faulty. The boost went from 21 to 25 PSI and I got driver demand error codes now and the boost fluctuates from 3,000 RPM. So I disconnected it and bypassed it again but the problem still exists just less aggressive.

I got a new boost control valve from Roverlord and will fit it tonight and hope it fixes the issue and allows me to set the boost correctly.

Maybe it wasn't the turbo the whole time

Originally Posted by Jazzman

I've recently fitted a SAAS EGT gauge. The temp prob is in the exhaust manifold right before the turbo.

With my remap it reads 900 degrees at approx. 4000 rpm at full throttle. With the standard map the EGT during the same test is 720 degrees.

Somewhere on this forum I read that 720 degrees is the max and heading into dangerous territory. If that is the case why would my standard map reach that high?

Is there a chance the gauge is inaccurate and reading high? How on earth could I test it? I can't exactly heat water to 500 degrees and drop it in.

Hi Jazzman,

WOW! I dont think I've ever had my TD5 up to 4000RPM - anyway for what it's worth here's my experience.

Years ago I fitted a TRS ECU upgrade ( from Triumph Rover Spares in Adelaide) and maybe a year further on fitted a VDO boost gauge and sometime soon after that started tinkering with increasing boost (it was a gradual thing 'cos life is short and I will not rush through it ) however over time I observed that as I increased boost the EGTs reduced noticeably. I drive frequently to Mansfield from South Eastern suburbs of Melbourne and at standard boost I could reach 900C hammering up the through the Merton Gap however since the tinkering my VDO analogue gauge now shows 20psi boost and the EGTs peak at 650C (my probe is immediately before the turbo). Now here's something I've noticed recently - last weekend I made the afore mentioned trip but this time i had cruise control on (in the words of the great B.P "I let the pony have it's head") and she pulled all the way up through the "Gap" at 22psi and the EGT topped at only 700C . Why the difference with the computer input verus foot on pedal I don't know but I'm doing the trip again in 2 days and i will let you know how she goes.

What gauge are you using to measure EGT, digital or analogue??

onebob

Originally Posted by Jazzman

I connected my boost control valve again to test if it was actually faulty. The boost went from 21 to 25 PSI and I got driver demand error codes now and the boost fluctuates from 3,000 RPM. So I disconnected it and bypassed it again but the problem still exists just less aggressive.

I got a new boost control valve from Roverlord and will fit it tonight and hope it fixes the issue and allows me to set the boost correctly.

Maybe it wasn't the turbo the whole time

As long as you get current driver demand fault codes there's some throuble with the TPS input which can affect fueling... if you have nanocom watch the air flow while you get those boost fluctuations and if the air flow is nice and steady then it's quite possible that the problem is only on the boost side of it but if the air flow fluctuates too it might be a fueling issue... i forgot if it was covered or not cos it's a long thread, do you get those fluctuations with MAF unplugged too?

Originally Posted by onebob

Hi Jazzman,

WOW! I dont think I've ever had my TD5 up to 4000RPM - anyway for what it's worth here's my experience.

Years ago I fitted a TRS ECU upgrade ( from Triumph Rover Spares in Adelaide) and maybe a year further on fitted a VDO boost gauge and sometime soon after that started tinkering with increasing boost (it was a gradual thing 'cos life is short and I will not rush through it ) however over time I observed that as I increased boost the EGTs reduced noticeably. I drive frequently to Mansfield from South Eastern suburbs of Melbourne and at standard boost I could reach 900C hammering up the through the Merton Gap however since the tinkering my VDO analogue gauge now shows 20psi boost and the EGTs peak at 650C (my probe is immediately before the turbo). Now here's something I've noticed recently - last weekend I made the afore mentioned trip but this time i had cruise control on (in the words of the great B.P "I let the pony have it's head") and she pulled all the way up through the "Gap" at 22psi and the EGT topped at only 700C . Why the difference with the computer input verus foot on pedal I don't know but I'm doing the trip again in 2 days and i will let you know how she goes.

What gauge are you using to measure EGT, digital or analogue??

onebob

My partner bought me an analogue SAAS EGT gauge so I bought a SAAS boost gauge to match. The green light matches perfect with the dash light too as a fluke.

By the way i'm up that way often, and live in the same area also. PM me if you're are interested in a trip.

Originally Posted by sierrafery

As long as you get current driver demand fault codes there's some throuble with the TPS input which can affect fueling... if you have nanocom watch the air flow while you get those boost fluctuations and if the air flow is nice and steady then it's quite possible that the problem is only on the boost side of it but if the air flow fluctuates too it might be a fueling issue... i forgot if it was covered or not cos it's a long thread, do you get those fluctuations with MAF unplugged too?

The boost gauge needle is not smooth from about 15 PSI up. I unplugged the AAP sensor and the engine ran much better, and the boost didn't fluctuate as bad or until 3500 RPM. I've ordered a new one.

I can't wait to have this sorted so I can stop flogging my freshly rebuilt engine.

P.S If anyone needs a turbo i have a spare now.

Originally Posted by Jazzman

The boost gauge needle is not smooth from about 15 PSI up. I unplugged the AAP sensor and the engine ran much better, and the boost didn't fluctuate as bad or until 3500 RPM. I've ordered a new one.

I can't wait to have this sorted so I can stop flogging my freshly rebuilt engine.

P.S If anyone needs a turbo i have a spare now.

By disconnecting the AAP you made the ECM to go into ''turbo pressure limited to 1 bar'' default and as your's made the tricks above that boost maybe that's the reason... i told you about that previously in this thread page #4 so i doubt that a new one will cure things , lets hope i'm wrong, especially that it's friggin expensive

Originally Posted by sierrafery

By disconnecting the AAP you made the ECM to go into ''turbo pressure limited to 1 bar'' default and as your's made the tricks above that boost maybe that's the reason... i told you about that previously in this thread page #4 so i doubt that a new one will cure things , lets hope i'm wrong, especially that it's friggin expensive

^^^X2 , happy 1000th post sierrafery Jazzman , don't know if you have tried looking at your live readings but this would let you know (if you have nanocom or equivalent) if your aap sensor was at fault , should read around the 100 mark if you are at sea level , dropping a couple of points on acceleration, , is your boost gauge pre or post intercooler?. , have you tried disconnecting maf cause if its going past its limit this will give you some of these dramas, if its going over the limit with standard map and boost then you need a new maf , bmw 5wk.... gives a slightly fatter mid range torque curve , haven't dynoed , but seat of the pants says so , has to be vdo / siemens ,what makes you think its aap sensor fault ?.