Paxton/Nelson supercharger issue - losing fluid, occasional large exhaust smoke cloud
#1
Paxton/Nelson supercharger issue - losing fluid, occasional large exhaust smoke cloud
Hey guys,
I've got a Paxton/Nelson SN-89 supercharged 87 6-port. Two days ago on the way home from work, after a downshift to 3rd during deceleration on an interchange, I got a large sudden cloud of blue or grey smoke from the exhaust.
Engine temp was fine, and it still boosted just fine afterward. There was no discernible loss of power. Upon inspection at home, all fluid levels were okay except the lubricant for the supercharger (which is automatic transmission fluid, for what it's worth,) which was below the low mark on the dipstick. I filled it to a bit over the high mark on the dipstick, and let the car sit 'til today. I tried driving it for about 40 miles, and hit boost a few times. About the second time I hit boost, I got the smoke from the exhaust again. Checked the supercharger lubricant again, and it's back down to about 1/3 of the way above the low mark.
So, what's happened? My gut reaction is that I blew a lubrication seal of some sort inside the supercharger, and I'm seeing that come out the exhaust, but I'd like to hear ideas from anyone who may happen to have input.
Thanks,
Collin
I've got a Paxton/Nelson SN-89 supercharged 87 6-port. Two days ago on the way home from work, after a downshift to 3rd during deceleration on an interchange, I got a large sudden cloud of blue or grey smoke from the exhaust.
Engine temp was fine, and it still boosted just fine afterward. There was no discernible loss of power. Upon inspection at home, all fluid levels were okay except the lubricant for the supercharger (which is automatic transmission fluid, for what it's worth,) which was below the low mark on the dipstick. I filled it to a bit over the high mark on the dipstick, and let the car sit 'til today. I tried driving it for about 40 miles, and hit boost a few times. About the second time I hit boost, I got the smoke from the exhaust again. Checked the supercharger lubricant again, and it's back down to about 1/3 of the way above the low mark.
So, what's happened? My gut reaction is that I blew a lubrication seal of some sort inside the supercharger, and I'm seeing that come out the exhaust, but I'd like to hear ideas from anyone who may happen to have input.
Thanks,
Collin
#4
Since I posted this thread originally, I had the blower rebuilt by Paradise Wheels (the company that services the blower and owns the rights to it, etc.) and had an intercooler added and the car re-tuned. I had the smoking issue again, and sent the blower back to Paradise Wheels - they found no moisture in the blower, and no cracks in the casing. If that's accurate, it means I'm getting oil (or something that's causing smoke) sucked into the engine another way.... unless smoke could be caused by running too rich. Is that possible? For what it's worth, it seems to be a greyish smoke, though I could be mistaken.
#7
If it was running too rich on deceleration, could that cause this problem?
It's only when the car is run up to 6k rpm or so, and only on deceleration.
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#11
It's a Haltech Sprint RE, and there is a blowoff valve installed. Not familiar with the term VAF.
#14
This sh*t burns oil!
iTrader: (7)
VAF = vane aif flow(meter). Aka the factory trap door air meter on fc's. Since you have a haltech thats a none issue. VAF and MAF cars that run a vent to atmosphere valve can get real rich after the initial dump of pressure and leave a quick puff of black smoke since the ecu has already metered air that was ditched. Your haltech is a map based system so that is a non issue. I would say everyone else is probably right oil control rings.
#15
mazda mario
Join Date: Jun 2007
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if you are mechcanically inclined check this,,
check for oil in the charge pipe thats one
check the plugs if you see oil on it and if there alot of carbon thats two
check the vaccums on the omp lines thats three
all this could conclued where the oil burning is coming from .
Im guessing that you dont have any emission stuff correct ??
check for oil in the charge pipe thats one
check the plugs if you see oil on it and if there alot of carbon thats two
check the vaccums on the omp lines thats three
all this could conclued where the oil burning is coming from .
Im guessing that you dont have any emission stuff correct ??
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Frisky Arab
2nd Generation Specific (1986-1992)
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08-18-15 05:30 PM
blowing, boost, deceleration, exhaust, fluid, intake, issue, lost, nelson, oil, paxton, smoke, smokes, supercgarger, supercharger, transmission