Notices
General Miata Chat A place to talk about anything Miata

Car died tonight...I don't think I want to fix it...

Thread Tools
 
Search this Thread
 
Old Sep 13, 2012 | 02:50 AM
  #1  
Doppelgänger's Avatar
Thread Starter
Elite Member
iTrader: (12)
 
Joined: Sep 2007
Posts: 6,850
Total Cats: 71
From: Charlotte, NC
Default Car died tonight...I don't think I want to fix it...

WTF? So I head out after school, meet a friend for a beer and head home.
Driving normally, no boost or anything I cruise to a stop and notice the smell of fuel...car seems to be running a bit rich. Light turns green, I get to 3rd gear (granny shifting at like 2.5k) and it loses power. I give it more throttle but nothing happens. It felt like I turned the key off. I try applying throttle again and get a loud backfire from the exhaust. I decide to pull over.

Once stopped I tried cranking the car. It turns over fine. Had a friend come help me and here are the observations-

Car has spark
Car has fuel
Checked all visible conectors
Plugs look normal
Cams turn over (not a broken t-belt)
Turning engine over results in nothing but the sound of an engine turning over
Turning engine over with throttle depressed 100% results in car huffing at times like it wants to fire......like a flooded engine....but it never fires. Tach slightly dithers at times.
Verified fuel pump primes when the key is turned on
Car was not having any problems when this happened..no over heating, oil leaks, coolant leaks, smoke....nothing.

This happened just before 11pm...and by the time I was done getting the car towed, I finally settled down to write this at 2:30am...I fuking tired and I don't know how motivated I am to figure this out. FML. At least I was on a surface street that wasn't busy and only 13 miles from home...and not on the interstate or far from home. Tow damage- $127.
Old Sep 13, 2012 | 02:53 AM
  #2  
Reverant's Avatar
Elite Member
iTrader: (10)
 
Joined: Jun 2006
Posts: 6,020
Total Cats: 369
From: Athens, Greece
Default

Connect to the Hydra and see if you have RPM.
Old Sep 13, 2012 | 03:12 AM
  #3  
Bond's Avatar
Elite Member
iTrader: (6)
 
Joined: Nov 2007
Posts: 3,219
Total Cats: 14
From: Southlake,Texas
Default

**** Hydra.
Old Sep 13, 2012 | 04:26 AM
  #4  
curly's Avatar
Cpt. Slow
iTrader: (25)
 
Joined: Oct 2005
Posts: 15,192
Total Cats: 1,398
From: Oregon City, OR
Default

Hmm, sounds similar to an issue I had, when the fuel pump wasnt working. Can you jump it to keep it on like you can with NAs? I know you said you heard it priming, but worth a shot. Also worth a shot is plugging in a stock ecu and seeing if anything changes.
Old Sep 13, 2012 | 05:02 AM
  #5  
Erat's Avatar
Elite Member
iTrader: (5)
 
Joined: Oct 2011
Posts: 5,718
Total Cats: 830
From: Detroit (the part with no rules or laws)
Default

Jumped time?

I wish i had a better suggestion, you covered most the basics.
Old Sep 13, 2012 | 05:36 AM
  #6  
damir130's Avatar
Junior Member
 
Joined: Jan 2009
Posts: 142
Total Cats: 6
Default

Had the same exact same problems when my CAS died
Old Sep 13, 2012 | 07:08 AM
  #7  
inferno94's Avatar
Senior Member
iTrader: (2)
 
Joined: Sep 2008
Posts: 521
Total Cats: 2
From: ON
Default

Same symptoms when I had cops problems (slight bit of oil on cops power wire connection). Car ran fine but would intermittently loose all power, I could always eventually get it going but there was often a large backfire (like an air bomb firecracker) just prior to functionality returning.

Mine was flooding due to intermittent spark and smelled like fuel before dying, the root cause was a small VC gasket knick that seeped oil onto cops wiring.

If you know you have spark, try unplugging the injector harness and crank. If it fires on what's in the cylinders, that suggests to me you may have an over fuelling issue (injectors / fpr), at a minimum it will clear your flooding (if that's the case).
Old Sep 13, 2012 | 08:04 AM
  #8  
BradC's Avatar
Junior Member
iTrader: (6)
 
Joined: Jun 2008
Posts: 458
Total Cats: 3
From: Lansdale, PA
Default

Does it feel like it turns over faster than normal?

Did you hit a bump in the road when this happened?

I had a problem that seemed like the relay under the column (forget what it's called off the top of my head). Ended up being one of the relays in the fuse box being loose. The female contacts wore over time and were loose on the relay. Caused intermittent headaches for a good year.
Old Sep 13, 2012 | 09:15 AM
  #9  
rleete's Avatar
Elite Member
iTrader: (21)
 
Joined: Jun 2007
Posts: 6,794
Total Cats: 1,342
From: Rochester, NY
Default

I'm guessing fuel delivery.
Old Sep 13, 2012 | 09:22 AM
  #10  
Doppelgänger's Avatar
Thread Starter
Elite Member
iTrader: (12)
 
Joined: Sep 2007
Posts: 6,850
Total Cats: 71
From: Charlotte, NC
Default

Just hooked up the laptop- saw rpm when cranking and afrs dropped to 10 when cranking. Got one backfire when cranking. Damn. Was hoping to see no rpm or something that might make this easy.

I'm about to put like $300 up to who can come over and get the car running :/
Old Sep 13, 2012 | 09:35 AM
  #11  
hustler's Avatar
Tour de Franzia
iTrader: (6)
 
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
Default

Check your rectum for abrasions.
Old Sep 13, 2012 | 09:36 AM
  #12  
shuiend's Avatar
mkturbo.com
iTrader: (24)
 
Joined: May 2006
Posts: 15,235
Total Cats: 1,700
From: Charleston SC
Default

You need to get AAA. For less then $100 a year you can get free towing for up to 100 miles. Would have easily paid for this one tow.

Can you get a datalog and a video of you trying to start the car?
Old Sep 13, 2012 | 09:41 AM
  #13  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

you smelled fuel and see AFRs go pigrich and it backfires...

this is a returnless system?
Old Sep 13, 2012 | 10:44 AM
  #14  
Doppelgänger's Avatar
Thread Starter
Elite Member
iTrader: (12)
 
Joined: Sep 2007
Posts: 6,850
Total Cats: 71
From: Charlotte, NC
Default

Yes, typical NB stock fuel system sans RC550s.

As for the tow- My insurance will reimburse me for the bill, so I'm not worried about it.

Will get video of the car trying to start when I get home.

I'm going to grab a compression tester just to make sure and pull the vc and timing covers off to make sure timing is on. This is strangely like what happened 2 years ago when I replaced the engine :( (I still don't know what happened to that engine- it had OK compression but wouldn't start).

Will try connecting the stock ECU to see what happens, but without an AFM and 550cc injectors, I don't know how successful that will be. I don't mind mechanical problems...stuff that is obviously broken, but **** like this (right now) makes me not want to even mess with it...
Old Sep 13, 2012 | 10:52 AM
  #15  
Reverant's Avatar
Elite Member
iTrader: (10)
 
Joined: Jun 2006
Posts: 6,020
Total Cats: 369
From: Athens, Greece
Default

Here's a remotely unlikely idea...take off the valve cover and check if the cam timing wheel on the cam is ok or if it is loose.
Old Sep 13, 2012 | 11:00 AM
  #16  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

I'm not very smart on the NB fuel system, but possible the regulator failed and you have **** tons of fuel pressure at the rail?
Old Sep 13, 2012 | 11:56 AM
  #17  
Doppelgänger's Avatar
Thread Starter
Elite Member
iTrader: (12)
 
Joined: Sep 2007
Posts: 6,850
Total Cats: 71
From: Charlotte, NC
Default

That's another thing I need to figure out how to check. So, how does one check fuel press. on a NB?
Old Sep 13, 2012 | 12:01 PM
  #18  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

until you figure that out, you can look for vacuum lines that might have come off?
Old Sep 13, 2012 | 12:07 PM
  #19  
18psi's Avatar
VladiTuned
iTrader: (76)
 
Joined: Apr 2008
Posts: 35,821
Total Cats: 3,482
Default

Or an injector went static? I had these exact symptoms on an 06 WRX with SHITTY PE850 injectors (almost as shitty as your RC's)...swapped to non-shitty injectors = car was peachy

Scenario was 100% exactly the same.
Old Sep 13, 2012 | 12:09 PM
  #20  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 80,552
Total Cats: 4,368
From: Chantilly, VA
Default

or that. there's something going on in that you're dumping in too much fuel.



All times are GMT -4. The time now is 08:56 AM.