Sofa King wrote:You do have gas ...right? Wouldn't be the first time that after a fun weekend, the gas guage was ignored.
Quoted for truth! Been there done that, boy did I feel stupid.
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May 10, 2010 9:44 a.m. Kia_racer Reader
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May 10, 2010 9:51 a.m. P71 SuperDork
Yup, 3/4 of a tank. We topped it off before the autocross.
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May 10, 2010 1:36 p.m. P71 SuperDork
UPDATE!!!
Compression is still there, cams still turn.
NO spark (from either coil)
NO fuel (plugs are totally dry)
So what died, the cam angle sensor?
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May 10, 2010 1:45 p.m. ZOO Dork
P71 wrote:
UPDATE!!!
Compression is still there, cams still turn.
NO spark (from either coil)
NO fuel (plugs are totally dry)
So what died, the cam angle sensor?
Are all the wires intact leading to the CAS? Could it have been jarred loose overa weekend of autox? Do CAS's just "go"?
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May 10, 2010 2:01 p.m. Armitage Reader
P71 wrote: engine goes boink-boink
I think I see the problem.
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May 10, 2010 2:01 p.m. P71 SuperDork
I checked the wires to the firewall, nothing loose, nothing broken. I unplugged all of the plugs, shot some electronic connector cleaner in all of them (the o2 sensor one was oily!) and plugged everything back in.
Conversely, I don't hear the fuel pump either.
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May 10, 2010 2:09 p.m. EricM Dork
P71 wrote:
(the o2 sensor one was oily!)
you have oil in your exhaust?
fuel pump not making noise though, sounds like an electrical issue, did you test the battery for voltage? maybe the alternator went out and then the battery slowly died.
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May 10, 2010 2:15 p.m. P71 SuperDork
No oil in the exhaust. The connector for the o2 sensor was oily. I don't see any leaks on the engine, but the VC gasket looks to have been replaced so it could have been residue from an old leak.
Battery is a 1-month old Optima Yellow-Top and has plenty of juice.
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May 10, 2010 2:20 p.m. Type Q HalfDork
Have you checked all the fuses?
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May 10, 2010 2:31 p.m. P71 SuperDork
I checked the little box under the hood. Are there others?
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May 10, 2010 2:51 p.m. CGLockRacer Reader
In reply to P71:
Above your clutch foot under the dash is another fuse box. I don't think they are engine related though.
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May 10, 2010 2:52 p.m. P71 SuperDork
I just checked those as well. All good.
I just get the feeling that this is one of those horrible "while I was in there" tasks that will wind up with me shoe-horning the 401 into the damn thing...
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May 10, 2010 3:16 p.m. Keith SuperDork
Common failure points that could cause no fuel/no spark:
wires to the cam angle sensor. They flex as the engine moves, and if one has developed a crack then you won't get fire or fuel.
main relay. Easy to check, so I'd start here. As I said, I've never seen one let go while the car was running.
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May 10, 2010 3:24 p.m. P71 SuperDork
Keith,
Where is the main relay and how do I check it?
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May 11, 2010 12:27 p.m. DWNSHFT Reader
P71 wrote:
We drove it all weekend, put about 250 miles on it. Audra and I got 8 autocross runs each with it. 3 miles from home it quit.
So, uh, it gave you faithful and fun service all weekend and nearly got you all the way back home before it finally let go? Sounds to me like a good car. It could have stranded you a lot farther from home... Or broken on the way to the event, denying you all eight autocross runs...
I think this glass is half full, not half empty.
David
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May 11, 2010 1:00 p.m. P71 SuperDork
It won't be a "half full" experience until I figure out what is wrong and fix it...
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May 11, 2010 1:33 p.m. Wonkothesane New Reader
That's pretty much the same thing that happened when the CAS went out... Driving on an on-ramp and WHAM, nothing. crank,crank,crank,crank....
Do you know anyone with a Miata who would let you pull theirs out and try it? That's what we did was just pull one from the friends' miata, only takes a few minutes.
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May 13, 2010 1:06 a.m. P71 SuperDork
Tis the cam angle sensor. Took a 150 bones at a mechanic to "confirm" my diagnoses. Suck. I found a complete head (with sensor) locally for $250 that I'm going to try first. 9 freaking days into unemployment and 3 miles from home...
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May 13, 2010 9:19 a.m. Wonkothesane Reader
Ouch!
Any chance of some place like planet-miata.com or www.anythingmazda.com having one for cheaper than that??
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May 13, 2010 9:52 a.m. willy19592 Reader
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May 13, 2010 9:57 a.m. Wonkothesane Reader
Sorry about forgetting you, Willy!
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May 13, 2010 11:03 a.m. 16vCorey SuperDork
Yikes! That's an expensive mo-fo.
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May 13, 2010 12:40 p.m. P71 SuperDork
Woot! Going to pick up new 1.6 Miata head complete with sensor. BRB
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May 13, 2010 2:50 p.m. Nitroracer Dork
If you just swap the cam angle sensor, make sure to slap a new o-ring on it first. Those things like to leak as you've probably seen.
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May 13, 2010 3:45 p.m. P71 SuperDork
I dropped off the new (used) CAS and a new o-ring (that Keith had already talked me into) to the mechanic for install. He promised to anoint it in holy oil first so it will work.
Anybody need a complete 1.6L Miata head with cams and no CAS?
