¯\_(ツ)_/¯
¯\_(ツ)_/¯ UltraDork
3/1/18 7:28 a.m.

Link to the car in question.

What do we think is wrong with this thing?  Ignition system?  Carbon buildup on something important?  Something way worse?  Rust may be a deciding factor, although I'm not afraid of repairing it if it's localized.

Robbie
Robbie GRM+ Memberand PowerDork
3/1/18 7:48 a.m.

Plugs. Easy. Go buy it.

¯\_(ツ)_/¯
¯\_(ツ)_/¯ UltraDork
3/1/18 7:49 a.m.

I'll be at a rally all weekend but if it's still around afterwards I plan to go look at it.

Dirtydog
Dirtydog GRM+ Memberand HalfDork
3/1/18 7:49 a.m.

P 0300  

"Borrowed" from AutoCodes

Possible causes

  • Faulty spark plug (s)
  • Faulty ignition coil (s)
  • Clogged or faulty fuel injector (s)
  • Intake air leak
  • Fuel injectors harness is open or shorted
  • Fuel Injectors circuit poor electrical connection
  • Ignition coils harness is open or shorted
  • Ignition coils circuit poor electrical connection
  • Insufficient cylinders compression
  • Incorrect fuel pressure
Furious_E
Furious_E GRM+ Memberand SuperDork
3/1/18 7:51 a.m.

Should not have clicked on the link, too close and too cheap

STM317
STM317 Dork
3/1/18 7:52 a.m.

7 page thread about PO300. Sounds like the most common root cause might be carbon buildup. EGR system contributes as well.

 

PS: When you sell a "mechanic's special" in Mechanicsburg, is it just called a "special"?

Toyman01
Toyman01 GRM+ Memberand MegaDork
3/1/18 7:52 a.m.

The discombubulator has come loose from the enaculabreator causing the windingulator to be out of ballance. 

pinchvalve
pinchvalve GRM+ Memberand MegaDork
3/1/18 8:10 a.m.

How do you let a Mazdaspeed 3 get in that condition?  Please slap the owner if you decide to buy it.  

dculberson
dculberson UltimaDork
3/1/18 8:18 a.m.

Want. 

Devilsolsi
Devilsolsi Reader
3/1/18 8:24 a.m.

I had one of these. Really fun cars. I miss mine. Sad to see one in that shape.

sergio
sergio Reader
3/1/18 8:29 a.m.

Plugs or coil would set a specific cylinder code most likely. Sounds like carbon buildup. Could be low fuel pressure, need scanner to check. I cleaned the carbon on mine at 80k. Put a catch can on at the same time.

if it’s driveable, check for it poping out of second gear. My second disappeared at about 95k. 

The0retical
The0retical UltraDork
3/1/18 9:03 a.m.

I'd put good money on the back of the intake valves being carboned up. Maybe a 3 hour job to fix it. Looks stock, haggard, and has high miles so it's a safe bet they've never been done.

Edit: If you grab it change to a stud kit to make life easier when you pull the intake manifold. Also check the injector seals for evidence of leaking. They're a known weak point and it'll cause that code or a ZZB.

 

I'm resisting the urge to leave work early and grab it out from under you. I want to turn something like that into a monster track rat. Though I probably wouldn't live to see tomorrow if SWMBO found out.

AngryCorvair
AngryCorvair GRM+ Memberand MegaDork
3/1/18 10:15 a.m.

randomly-occurring air leak causing occasional random misfire.  look for torn air intake boot between MAF and TB.

Mndsm
Mndsm MegaDork
3/1/18 10:22 a.m.

Needs a good de carbon. Mine did that. 

¯\_(ツ)_/¯
¯\_(ツ)_/¯ UltraDork
3/1/18 10:35 a.m.

In reply to The0retical :

Why don't you just do that and "hide" it at my place- hell, we can even put the title in my name to be really sneaky about it cheeky

Pete Gossett
Pete Gossett GRM+ Memberand MegaDork
3/1/18 10:40 a.m.
¯\_(ツ)_/¯ said:

In reply to The0retical :

Why don't you just do that and "hide" it at my place- hell, we can even put the title in my name to be really sneaky about it cheeky

That would be the 2nd GRMer-owned MS3 residing at another GRMer's place that I'm aware of. We may be able to start some kind of oddball trend/cult here.

boaty mcfailface
boaty mcfailface UberDork
3/1/18 11:16 a.m.

Anyone in the DC region looking to buy an MS3? You can store it at my place. Lol. 

Mndsm
Mndsm MegaDork
3/1/18 11:30 a.m.

In reply to Pete Gossett :

They'd both be black too! Though I know the other one is significantly less rusty. 

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