really strange problem

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A

adnoh

Senior Member
Hey guys,

The past 5 times I've gone out and driven my car for 40 minutes or more EXACTLY, my speedo goes crazy, then dies, and I throw a code. If I turn my car off, then on, the code dissapears. Really wierd.

I've tried to get the code to come on constantly, but it won't stay.

I've recently changed my battery, alternator, and thermostat, so I don't think it's anything to do with those.

Now, my question is: If I throw a code, is there some sort of memory built into the ECU that will remember it? Basically, if I'm not currently throwing a code, does the ECU keep a record of the last one thrown? Meaning, can I flash the ECU to diagnose the code if my engine light isn't currently on?

Thanks for any help.

If it matters, I'm running a JDM P30 OBD1
 
the N.O.T.O.R.I.O.U.S ELD

lol thats great.

there's a chance that you can pull the code from the computer.
the second you see it come on, shut down the car, pull off the road... and pull it right then and there. leave the key on...
like, just turn the key back 1 click to shut it off but it will leave the acessory power on.

ok course, use some judgement and don't kill yourself or others in the process :)
 
Thanks guys, that's a good idea.

So what does the N.O.T.O.R.I.O.U.S. ELD Entail? Never heard of it.....
 
just grounds comming loose or not connected at all. itll make your guage cluster whig out too. thats the only reason i suggest it.
 
electric load detector. basically it detects if you're going up a hill, etc etc... changes the maps a little bit. a free rev has next to no load (why you can't really build boost) and a rev while in 3rd gear will have a lot of load.

the eld is in the dsitributor
 
Well, found out what my problem is. It's code 17, so my speed sensor on the tranny is the problem. Thats why the speedo went all crazy, then the engine light came on. I checked the sensor and the middle pin was almost completely corroded. I sourced out the sensor and am going to solder it in sometime soon.


Thanks for the help.
 
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