I may be joining the trashed motor club....
#1
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I may be joining the trashed motor club....
well the car is smoking..... quite a bit as of last night...
first things started as a little smoke on startup, that went away after 30 seconds or so.....
now it seems to just smoke any time I'm on the throttle..... hoping it's the turbo, but I pulled a plug and there was oil on the threads....
need to run a compression check today at some point, but it's *** hot out....
worst part is I have an autocross school tomorrow, and the miata is fucked up, looks like I'll be driving the 240 instead unless I solve the smoke problem today somehow.
oil level is fine, as is coolant level, and both look clean. The turbo's spoolup seems like it has gotten a bit slower lately (not that it was fast in the first place) it has a bit of up and down shaftplay, but no side to side or forward and back play in it.....
I'll also check the PCV valve, but then again it was fine a month ago or so....
any ideas? the smoke doesn't have a distinct smell of fuel, coolant or oil.... it's dark colored, and there is an oilyish residue (that's always been there) inside the tailpipe) Also, we put a test pipe on the car yesterday if you think that I might just be burning **** out of the exhaust......
first things started as a little smoke on startup, that went away after 30 seconds or so.....
now it seems to just smoke any time I'm on the throttle..... hoping it's the turbo, but I pulled a plug and there was oil on the threads....
need to run a compression check today at some point, but it's *** hot out....
worst part is I have an autocross school tomorrow, and the miata is fucked up, looks like I'll be driving the 240 instead unless I solve the smoke problem today somehow.
oil level is fine, as is coolant level, and both look clean. The turbo's spoolup seems like it has gotten a bit slower lately (not that it was fast in the first place) it has a bit of up and down shaftplay, but no side to side or forward and back play in it.....
I'll also check the PCV valve, but then again it was fine a month ago or so....
any ideas? the smoke doesn't have a distinct smell of fuel, coolant or oil.... it's dark colored, and there is an oilyish residue (that's always been there) inside the tailpipe) Also, we put a test pipe on the car yesterday if you think that I might just be burning **** out of the exhaust......
#3
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meh, I'd just change turbo's..... one of the reasons I think it may be a turbo issue is that I've been running a fleabay T3/T4 for a little over a year now.... it was bound to go at some time
#5
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if it's turbo it would only smoke during vacuum... like sitting at stoplights or light cruise. that's when it'll suck oil through the seals and smoke like a bitch.
smoke under power and black oily soot is probably sadly rings. maybe valve seals depending on the compression test results.
Here's my guesses:
compression low dry, compression high wet: rings
compression low wet and dry: valve seats and possibly seals.
compression fine: valve seals
smoke like a SOB at idle: turbo seals
smoke under power and black oily soot is probably sadly rings. maybe valve seals depending on the compression test results.
Here's my guesses:
compression low dry, compression high wet: rings
compression low wet and dry: valve seats and possibly seals.
compression fine: valve seals
smoke like a SOB at idle: turbo seals
#7
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yeah it smokes bad at idle, and just off idle at a stop. If I stall the car and re-start it, it smokes badly (only stall because the clutch is junk)
started it up today in hopes of a miracle before my level 2 autocross school, and the smoke is light in color, and increases with throttle input at a stop, but I didn't really throttle it up much because it was cold.
ended up using the 240 fopr the school today instead.....
started it up today in hopes of a miracle before my level 2 autocross school, and the smoke is light in color, and increases with throttle input at a stop, but I didn't really throttle it up much because it was cold.
ended up using the 240 fopr the school today instead.....
#10
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so i run a compression check (car is a 2000)
results are as follows.... from front of engine to back
Dry:
165
150
150
180
Wet:
180
160
170
190
The plugs had oil on the treads and were rather dark in color..... I assume piston rings at this point. Might have a leakdown done to confirm.....
Opinions????
results are as follows.... from front of engine to back
Dry:
165
150
150
180
Wet:
180
160
170
190
The plugs had oil on the treads and were rather dark in color..... I assume piston rings at this point. Might have a leakdown done to confirm.....
Opinions????
#17
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Join Date: Nov 2005
Location: Baltimore Maryland
Posts: 1,038
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new results, with throttle wide open, and all plugs pulled....
210
185
185
210
also, a funny noise from the head as I was revving the car up a bit to look at the smoke and warm it up for the test.... kinda like a quick rattle around 4k on both the up and downswing of revs....
210
185
185
210
also, a funny noise from the head as I was revving the car up a bit to look at the smoke and warm it up for the test.... kinda like a quick rattle around 4k on both the up and downswing of revs....