Miata tech question - computer self-diagnostic codes?

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peterfontana
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Miata tech question - computer self-diagnostic codes?

Post by peterfontana » Mon Jun 18, 2007 10:05 am

Hi,

I have a 1993 Miata that has recently developed a tip-in stumble. The service manual says to check codes first, and shows some fairly specific looking diagnostic gear to accomplish this.

So I immediately closed the manual, crossed my fingers, bought an O2 sensor, and discovered that wasn't it.

Is there a "jump two pins and then count the blinking lights" type of work-around to read computer self-diagnostic codes? If not, does anyone around Eastern Mass have the required hardware that I could borrow (or is there a reasonably priced alternative)?

Thanks for any help,
- Peter

LDP82
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Post by LDP82 » Mon Jun 18, 2007 12:12 pm

yes you can jump two pins (i think ground and ten) and count the CEL blinks. look around on miata.net. i have an OBD2 miata so i dont remember what you have to do but its not hard.
Racing makes heroin addiction look like a vague longing for something salty - Peter Egan

WillM
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Post by WillM » Mon Jun 18, 2007 6:22 pm

I'd check for vac leaks.
Is the CEL on? This is the link Luke was talking about:
http://www.miata.net/garage/faultcodes.html
96 Miata #72 SC
PRA 4 :sunny:

peterfontana
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Post by peterfontana » Tue Jun 19, 2007 8:20 am

Thanks for the info.

dinoracer
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Post by dinoracer » Tue Jun 19, 2007 2:04 pm

I think you need to dump that girlie car :wink: and bring the Mustang back to the track... :lol: :wink: :wink:
Tom Cannon

Former COM Chief Steward (fka Chief of Operations, Chief of Tech, assistant BBQ cook, Club Secretary....I been around a while)
#26 - 2000 Black Miata (sold) - co-driver of the orange 318ti .. thanks Scott!

peterfontana
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Post by peterfontana » Tue Jun 19, 2007 3:14 pm

After a quality shop did a freshening of the short block (new hone, rings, etc) and valve guides/seals, I'm still seeing a lot of oil smoke, especially on decelleration. Too much to race. I even resorted to a new mighty demon carb to replace the Holley 750 double pumper I had. I'm bumming out, Tom. Got any suggestions?

dinoracer
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Post by dinoracer » Tue Jun 19, 2007 3:29 pm

I feel that pain, I'm having the same only worse problem on my most recent engine. (There's a long story over the past year).

I your case, I'd ditch the pcv system, run a hose from each valve cover into a catch can with a breather. about $ 100 in parts from Summit racing or jegs, including cheap crappy stamped steel valve covers
Tom Cannon

Former COM Chief Steward (fka Chief of Operations, Chief of Tech, assistant BBQ cook, Club Secretary....I been around a while)
#26 - 2000 Black Miata (sold) - co-driver of the orange 318ti .. thanks Scott!

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