93 civic b20/vtec setup.. check engine light problem.
#1
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93 civic b20/vtec setup.. check engine light problem.
I recently swapped a b20 into my 93 civic. Check engine light wasn't on.. then I turn the car off, start it up hours later and the light is on. The car is in limp mode, setting the rev limit to 3000rpm. When I tried to pull the code the light is on solid. Its not flashing the code out. I reset ecu by pulling 7.5A back up fuse... start the car back up no check engine light on.
Once I reset ecu I can drive as much as I want, no check engine light. The minute I turn the car off and back on the CEL is on.. but I cant retrieve the codes.
ANY SUGGESTIONS? Thank you HT
Once I reset ecu I can drive as much as I want, no check engine light. The minute I turn the car off and back on the CEL is on.. but I cant retrieve the codes.
ANY SUGGESTIONS? Thank you HT
#4
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Re: 93 civic b20/vtec setup.. check engine light problem.
P75 is a non vtec ecu. Not only will it throw several codes, it will also run it very lean (vtec head flows much better than LS/B20 head)
But it sounds more like you have an ECU or sensor issue. Try another ECU.
But it sounds more like you have an ECU or sensor issue. Try another ECU.
#5
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Re: 93 civic b20/vtec setup.. check engine light problem.
A solid check engine light does not mean "no codes" that means its a bad ECU.
Also, if he uses a P75 on a B20V, it wont throw any codes (assuming everything else is in good running order), it just wont engage VTEC.
Also, if he uses a P75 on a B20V, it wont throw any codes (assuming everything else is in good running order), it just wont engage VTEC.
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