Quote:
Originally Posted by Gelbster
James - excellent write up of the diagnosis .Thank you for sharing.So often such Threads just die or the OP says "it was 'the' relay".
So your problem was 'just' the faulty SAI pump motor relay ? Part #: 993-615-115-01
Porsche Boxster (1997-2004) - Emissions Equipment - Page 3
No vacuum leaks, no vacuum component failures?
I ask because one of the causes of relay failure is a defective SAI pump that draws too much current because the bearings are worn or it is literally falling apart inside the case.. The pump can be rebuilt but it is tedious. More in Search. http://rennlist.com/forums/996-forum/735878-sai-repair-diy.html
How did the SAI pump work with a faulty relay ? Because you hot wired it ?
btw ,if that relay is like mine, it is an oddball pin orientation - in case others think a generic will work.
Considering the frequency with which this subject comes up, your diagnosis will be very helpful to other Forum members.
It certainly makes the ROW reflash seem appealing -if that is still available?
ECU Doctors used to offer it for $500.
ECU Performance Tuning for Porsche Boxster ECU DME - Specialized ECU Repair |
I believe the failure is contained within the relay. The SAI pump pulls quite a bit of current. The 40 amp fuse was good and I'd hope that would go before the relay if the pump were to blame.
The relay had seen an extreme amount of heating on the connector blade that is nearest the relay contact pads. On pulling the relay apart the pads and the metal around them showed signs of extreme heat. The connector blade nearest the contact pads is not only discolored from heat, but is dead soft from annealing. I've never seen anything like it. You can easily bend the connector blade with your fingers into a "C" shape. I doubt the other blades could be bent like that with needle nose pliers. I think the contact pads became contaminated with carbon/corrosion and the resistance increased until something inside the coil circuit failed open, perhaps a solder joint I cannot see it though.
I have heard the fan run on cold mornings, but not for the last couple of years because we've had few cold mornings. I did jumper the fan and it spins right up and sounds sweet.
Gilles, that is the only time I've seen a pelican on my deck to I snuck up and snapped a picture. What is really interesting is the gulf osprey in the background on the railing of the neighbors pier
