One project down, and a peculiar problem.
#1
Nordschleife Master
Thread Starter
One project down, and a peculiar problem.
Finished up work on an 85 Koenig with 87 engine running MS v3.57 w/ COP ign.
We didn't do a baseline so I cannot tell you that.
But I redid the intake and valve covers, and reworked the crankcase breather using a custom made stainless air oil separator.
I then custom fabbed a rear mount turbo. It is roughly a T62.
Took the car to the dyno and put down 450 RW ft lbs (full boost around 1500rpm) and 370rwhp.
This is running 5 psi of boost on a mustang dyno.
The car sounds pretty amazing if do say so myself. I'm hoping to get a tiny go pro video of the sound tomorrow.
On to the interesting problem though.
One of the local lads has an 84 (us/cdn) 928S.
When the key is in the ON position running or not, if you push the rear defroster for high power the headlights cycle up/down w/o coming on.
If I pull the headlight relay they stop cycling until I plug it back in.
If I pull the defrost relay they stop cycling and down come back on till I push the button again.
Has anyone seen this symptom before???
I am thinking defective defrost relay (already rerun solder), but would be nice to confirm and don't have an early relay to test with.
We didn't do a baseline so I cannot tell you that.
But I redid the intake and valve covers, and reworked the crankcase breather using a custom made stainless air oil separator.
I then custom fabbed a rear mount turbo. It is roughly a T62.
Took the car to the dyno and put down 450 RW ft lbs (full boost around 1500rpm) and 370rwhp.
This is running 5 psi of boost on a mustang dyno.
The car sounds pretty amazing if do say so myself. I'm hoping to get a tiny go pro video of the sound tomorrow.
On to the interesting problem though.
One of the local lads has an 84 (us/cdn) 928S.
When the key is in the ON position running or not, if you push the rear defroster for high power the headlights cycle up/down w/o coming on.
If I pull the headlight relay they stop cycling until I plug it back in.
If I pull the defrost relay they stop cycling and down come back on till I push the button again.
Has anyone seen this symptom before???
I am thinking defective defrost relay (already rerun solder), but would be nice to confirm and don't have an early relay to test with.
#3
Electron Wrangler
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Why not investigate the grounds above the CE panel - maybe one is loose. When unrelated circuits start interacting - always suspect grounding issues first... may not be the only answer but its the most common...
Alan
Alan
#4
Rennlist Member
Maybe a broken ignition switch?My shop told me my 84 S has also strange behaviour after standing 1,5 years without an engine.
After reinstalling the "new engine"the new ignition switch cured all strange failures.
After reinstalling the "new engine"the new ignition switch cured all strange failures.
#5
Nordschleife Master
Thread Starter
Alan,
The grounds above the CE panel were cleaned and tightened down one at a time, as were the ones below the column. This was the first thing I tried, though I will check them again.
The grounds above the CE panel were cleaned and tightened down one at a time, as were the ones below the column. This was the first thing I tried, though I will check them again.
#6
Team Owner
are the correct PN relays installed?
if one of them has been replaced then the new relay may be causing the issue.
Dont keep testing this as you may short out another system, also check the connectors along the bottom of the CE panel make sure they all are plugged in and that none of the individual wires has come unseated, and been pushed out of its connector.
Also inspect the rear of the CE panel for melted wires,
the wires will have satin look to them unless they have gotten hot then they will turn shiny
if one of them has been replaced then the new relay may be causing the issue.
Dont keep testing this as you may short out another system, also check the connectors along the bottom of the CE panel make sure they all are plugged in and that none of the individual wires has come unseated, and been pushed out of its connector.
Also inspect the rear of the CE panel for melted wires,
the wires will have satin look to them unless they have gotten hot then they will turn shiny
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#8
Electron Wrangler
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Alan
#10
Finished up work on an 85 Koenig with 87 engine running MS v3.57 w/ COP ign.
We didn't do a baseline so I cannot tell you that.
But I redid the intake and valve covers, and reworked the crankcase breather using a custom made stainless air oil separator.
I then custom fabbed a rear mount turbo. It is roughly a T62.
Took the car to the dyno and put down 450 RW ft lbs (full boost around 1500rpm) and 370rwhp.
This is running 5 psi of boost on a mustang dyno.
The car sounds pretty amazing if do say so myself. I'm hoping to get a tiny go pro video of the sound tomorrow.
On to the interesting problem though.
One of the local lads has an 84 (us/cdn) 928S.
When the key is in the ON position running or not, if you push the rear defroster for high power the headlights cycle up/down w/o coming on.
If I pull the headlight relay they stop cycling until I plug it back in.
If I pull the defrost relay they stop cycling and down come back on till I push the button again.
Has anyone seen this symptom before???
I am thinking defective defrost relay (already rerun solder), but would be nice to confirm and don't have an early relay to test with.
We didn't do a baseline so I cannot tell you that.
But I redid the intake and valve covers, and reworked the crankcase breather using a custom made stainless air oil separator.
I then custom fabbed a rear mount turbo. It is roughly a T62.
Took the car to the dyno and put down 450 RW ft lbs (full boost around 1500rpm) and 370rwhp.
This is running 5 psi of boost on a mustang dyno.
The car sounds pretty amazing if do say so myself. I'm hoping to get a tiny go pro video of the sound tomorrow.
On to the interesting problem though.
One of the local lads has an 84 (us/cdn) 928S.
When the key is in the ON position running or not, if you push the rear defroster for high power the headlights cycle up/down w/o coming on.
If I pull the headlight relay they stop cycling until I plug it back in.
If I pull the defrost relay they stop cycling and down come back on till I push the button again.
Has anyone seen this symptom before???
I am thinking defective defrost relay (already rerun solder), but would be nice to confirm and don't have an early relay to test with.