I did a mini me swap on my 93 dx and it runs great but has a check engine light on. When I start it after it ahs sat for a while, it idles around 2500-3000 and occasionally revs up then down by itself. It sound slike there is some sort of vacuum thing going on also. I went down to the local auto store that lets you plug in the computer to get the codes, but we can't figure out where to plug it in at. I have an obd1 p28....any thoughts???????????
Brandon

 

OBD2 systems are the ones you plug a scan tool into, since you are OBD1, you dont have the DLC port. you find it yourself, you dont need a scan tool.

go here, and it will tell you how to get the code(s).....
https://honda-tech.com/zerothread/1901557

 

I have the exact same problem with my car.. My car was obd2 but I did a swap b16a and now it's obd1.. Now I have a check light but I can't find it.. Any thoughts plz

 

Try searching or click the sticky at the top of the page. Kids these days

 

You can't...find your CEL?

Start off by creating your own thread, and not bumping a 5 year old dead one. Second, there's a CEL sticky - read it.

 

There should be a green or whit plug that is extra next to your ecu. When you find it you need to jump the wires but using anything from a paperclip to a piece of stereo wire. Make sure the car is on an running. The check engine light should blink. Long blinks are ten and short blinks are 1. So then when you read your check engine light and add up what number the blinks are then look for those on the obd1 ecu fault codes list, this should help you solve your problem. Could be idle air control valve tho.

 

... It dosent need to be running just electric on On a obd2 to obd1 conversion harrness you can connect the wire for the check engine light to a switch (the wire just need to be grounded) so you can check codes on the fly. Just google OBD1 Honda ecu connectors or something of that nature

 

For anyone looking up this info in future years, CHECK THE ****FAQ****, dammit.

Thread closed.