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Old 01-06-2008, 11:07 PM   #1 (permalink)
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Default Check Engine Light - How To Diagnos??

My check engine light came on about 300 miles ago and I tried to go to autozone to get it diagnosed but they said since its under 95 they cant do it. I dont have a diagnostic scanner but my friend told me theres a way to find out on an OBD1 ECU by doing some kind of trick to make the check engine light flash a certain amount of times and that'll tell you whats wrong. Anyone know how I can find out whats wrong?

It came on about 300 miles ago and nothing has changed since, no difference in idle, no weird noises, no difference in performance, nothing. Anyone have any suggestions??
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Old 01-06-2008, 11:15 PM   #2 (permalink)
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Default Re: Check Engine Light - How To Diagnos??

http://stealth316.com/2-diagconn.htm

http://stealth316.com/2-diagcodes91-93.htm

It's really easy, just follow the steps.
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Old 01-06-2008, 11:17 PM   #3 (permalink)
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Arrow Re: Check Engine Light - How To Diagnos??

oh and btw, this can only be done on first gens. (91-93). After that I believe is when you could turn the key and read the number of times the check engine light blinked. I'm guessing that your O2 sensor is bad.
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Old 01-07-2008, 02:06 AM   #4 (permalink)
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Default Re: Check Engine Light - How To Diagnos??

Yeah ViperZ is right. What it basically is, is a jumper that will make the engine light flash a number of times....how it flashes is your code. Its like morris code. You will get quick flashes then slow flashes. You count the slow as tens and the quick flashes as ones. ie. __ __ - - - would be 23. and 23 will be the code. You will then have to look up what the code means then go through a dio tree to figure out exactly what caused the fault code.
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Old 03-21-2008, 12:01 AM   #5 (permalink)
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Default Re: Check Engine Light - How To Diagnos??

Quote:
Originally Posted by ViperZ View Post
hi viperz and others who read this.
I how, if you dont have the device shown on the site, would you go about self checking diagnosis from the "morse code" check engine blinking. BTW those two sites were good. but i dont see how you can check with out the device.
thanks
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Old 12-01-2009, 07:54 PM   #6 (permalink)
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Default Re: Check Engine Light - How To Diagnos??

So can anybody verify "turning the key" method to get the CEL blinking the codes? I can't get it to work.
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Old 12-06-2009, 11:58 AM   #7 (permalink)
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Default Re: Check Engine Light - How To Diagnos??

is key method possible for a 94?
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Old 06-10-2010, 01:44 PM   #8 (permalink)
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Default Re: Check Engine Light - How To Diagnos??

i know this may be completely off topic but it seems like you know a lot and I've been looking for a while and still haven't found a problem that resembles mine.

i'm driving at low speeds (0-10) and my car (91 stealth r/t automatic) starts hesitate kind of like when you have a manual transmission and you don't give it enough gas. My check engine light and my abs lights blink then go away ... the car either shut offs and goes through it two or three times then run fine again...

do you have suggestions for me?
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