Thread: Low power in a td5 (again)

Originally Posted by sierrafery

shouldn't be too high cos the D2 is set to 18.85psi from factory and can be adjusted to 20 from the wastegate rod without any other ad-on, also the higher the boost is the lower the EGT goes... if you have only 15 it's too low so that's the problem...did you clean the MAP sensor, do you still have the EGR? ...that's why without propper diagnostic is hard to give an answer cos if the AAP(airbox) sensor fails the ECU goes to default of max 15psi boost

No EGR
clean Map
The pressure spike sensor disconnected
will set to 20 PSI and see if the wife can kill it ,,
cheers for that

what's "presure spike sensor"?

what's "presure spike sensor"?

It looks like the Op is referring to the boost controller which works about opposite to his understanding.
I know you know, but for the OP the boost controller is electronically controlled but otherwise like a Dawes valve that is fitted to Nissans to stop boost bleed at lower boost and therefore improve boost at low boost levels by isolating the wastegate until a set boost level is achieved.
Regards Philip A

Thanks for the help fellas, managed to get around 1.5 l in to the box. Haven't driven it yet will fix FPR leak first and then see where we are at. Not giving up plenty of happy d2 owners out there and I am/ will be one. Different topic but anyone use the icarsoft 930 etc for diagnostics?
Ps also going to do a stall test and check or remove centre muffler

I havn't got one. But check that it is ok for the TD5. Website just indicates LR, not which models. Whilst the TD5 has an OBDII socket, it isn't OBDII compliant. V8 is. That's why the nanocom is so popular for TD5s.

Forget about that iCarsoft tool, when it comes to Td5 it's wasted money

Just wanted to update those who have given advice. I think I may have had a couple of compounding problems.... Haha always the way making it hard to diagnose a single fault. I took of the heat shield to check waste gate and boom warped manifold or at least blown gasket on three cylinders. i had the manifold linished as it wasn't that bad, studs on cylinder 5 have been upgraded already. Replaced gasket etc and while I was at it change boost controller just because there seemed to be a lot of oil ( exhaust back pressure I believe). Started the car and warmed it up a bit sounded like there was and exhaust leak still? I got underneath and engine side of muffler was cooking hot but the tail pipe side I could hold and was just warm at best. Centre muffler gone. I will cut it open and see how it looks but pretty sure that's the problem.