Without any tuning boost below 1.3 bar is low, that was the factory setting with wastegate at 13 threads and overboost limit at 1.42 . Running with low boost even if it seems OK it's not... especially if you dont have EGT gauge.
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Without any tuning boost below 1.3 bar is low, that was the factory setting with wastegate at 13 threads and overboost limit at 1.42 . Running with low boost even if it seems OK it's not... especially if you dont have EGT gauge.
It was a very quick tweak. But point taken. The WGM has always been a little sus I think.Quote:
Originally Posted by shack
No EGT gauge on this car. Does the ECU limit overboost through fuelling?Quote:
Originally Posted by sierrafery
No, but once you have hit an overboost situation, fuelling is reduced until an engine restart occurs.Quote:
Originally Posted by Tins
Sorta what I meant, but that clears it up for me.Quote:
Originally Posted by shack
My 99's boost modulator failed open allowing unlimited boost. The ecm repeatedly temporarily cut fuel on hills due to the excessive boost.
Well, yesterday I replaced all of the boost hoses and the horrible hissing still occurs so I reckon that among other things I have a split intercooler...[bawl]
The other thing that's suspect is the air bleed valve. I've had dramas with this in the past and the symptoms are similar. This leads me to a new question.
Can a Td5 run OK without the air bleed valve ? That is, just remove the plastic insert and run like that. I don't have a spare aid bleed valve so if I can run without it for a few days, until I can get a new one, that'd be good. If the air bleed valve is clogged that very firmly calls out the injector seals and washers. I s'pose I'd better order them (genuine of course) as I used my two sets last time I had dramas...
If you post up or send me a recording log from the instruments screen on the nanocom, I can possibly tell you if you have a leak .... Only Possibly though as your MAF may be failing.Quote:
Originally Posted by Markf
I tried to get a recording yesterday but my SD card failed after it wrote a few lines... Bugger. I'll do it again today with another card.Quote:
Originally Posted by shack
I've got a leak alright - I can hear it at around 2300 rpm. It doesn't even have to be at much power. It's most notable at the change from 1st to 2nd and from 2nd to 3rd. It's an auto and I assume that 2300 rpm is around max boost depending on load.
Do you have any clues as to how it'd go with the air bleed valve removed ?
OK. Here we go - some lovely data from the Nanocom. From a quick look I'm betting on seals and washers...[bawl] A new MAF wouldn't hurt either...