CEL codes, need some help on where to start
- Thread starter Gat0rvean
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KidVermicious
New member
You need to know what the codes mean, or you need to know what to do about them?
http://personal.utulsa.edu/~nathan-buchanan/93fsm/engine/85diagnosi.pdf
http://personal.utulsa.edu/~nathan-buchanan/93fsm/engine/85diagnosi.pdf
Gat0rvean
New member
I did the clearing of the codes (pulled EFI fuse for 30s) and then took it around the block and up to 50MPH, probably a little less than a half hour though. Either way, same codes popped up. The CEL comes on if I go over ~10-15 MPH, every time, but it will stay off until that time. A side note, the CEL came on as it always does after clearing the codes, kind of expected it to stay off at least a little longer, but I don't know.
I got under the truck and looked at the O2 sensor as some people suggested for trucks throwing 25+26, it looks pretty damn old so I went ahead and ordered one just to swap out. I was reading in the Haynes manual about testing the ignition coil, but not quite sure I understand how to dot hat quite yet, I'll have to read through it a couple more times, but I'll report back with results if I get it figured out.
Any suggestions on the 52 code? I don't know anything about the Knock sensor, or what to do to troubleshoot that one. Thanks for the reply!
KidVermicious
New member
Bad wiring on the knock sensor is terribly common for your motor, a quick google should get you way more info than you ever want on that. Simultaneous codes for too rich and too lean could be a malfunctioning O2 sensor, or it could trouble in your fuel system. If it's not the O2 sensor, start with the regulator.
codes 14,25,26, and 52 help!!!
Hey whats up guys I have a 1995 4runner and pulled up the same codes 14,25,26, and 52 and im totally lost I did a head gadgets meaning I replace the knock sensor wire looked old and its been about over a year I did all that and not the check engine light comes on after I drive it for a few minutes and losses power and I turn off and turn the truck back on and the light goes off and turns on after a few minutes of driving anyone knows what should I do first before I take everything apart to replace the knock sensor ?????
Hey whats up guys I have a 1995 4runner and pulled up the same codes 14,25,26, and 52 and im totally lost I did a head gadgets meaning I replace the knock sensor wire looked old and its been about over a year I did all that and not the check engine light comes on after I drive it for a few minutes and losses power and I turn off and turn the truck back on and the light goes off and turns on after a few minutes of driving anyone knows what should I do first before I take everything apart to replace the knock sensor ?????
I agree with Kid that you should do the O2 sensor first then see what happens. If none of the codes go away it can be something to do with fuel system (fuel filter clogged?) As for the knock sensor code pray that it goes away if the lean/rich codes go away cause you'll have to rip the top of the engine off to get to the knock sensor and the wiring harness.
As for the ignition coil, you can test it but I was under the impression those things either worked or they didn't. Please correct me if I am wrong.
