Like the title says I swapped in a complete b16a3 with its original obd1 harness into an obd2 97 del sol shell. It seems to plug in fine at the shock towers but the is an extra plug on the passenger side. I am also using the stock p30 ecu with an obd1 to obd2 conversion harness. Should this work? Reason I ask is because it barely starts and runs so I want to make sure I have the right harness https://www.youtube.com/watch?v=WEv8...ature=youtu.be

 

Posting a picture of the extra plug will be more helpful than your video.

 

Also, your video shows NO "Check Engine" light coming on during "key on"... does it work ? Do you have any stored codes ? Where did your adapter harness come from ?

 

Heres the extra plug, I dont know if the cel works, the ecu conversion harness was from ebay

 

Are there two or three wires in the open plug ? I am not completely sure, but I think that plug was for the CKF sensor found along the back left corner of the engine just behind the alternator inside the lower timing cover. Obviously, if you have converted to OBD-1, this sensor would NOT be used and the plug can be left alone. Make sure that the plugs that do match up have wires that meet on both sides of the plug. In the cases where the colors might be different (VTEC Solenoid and Pressure switch), you will need to consult a factory service manual to verify all wires go to the appropriate location.

If you feel confident that all wiring at the engine end is proper, and your grounds are all good, you must now consider the adapter harness and ECU to be suspect. Try known good parts in their place to rule them out.

 

All parts are known to be good since the swap ran fine, everything but the shell I guess so basically either bad cabin harness or ecu jumper harness?

 

4 wires in open plug in passenger side

 

An obd2 integra harness might work, specifically one with vtec.

 

So I need an obd2 engine harness to run an obd1 motor in an obd2 car with a obd1 ecu? Will obd2 harness even connect to my engine. Whats the point of the obd1 to obd2 ecu conversion harness then if you cant run obd1 ecu. Sounds like I need del sol b16a2 ecu and harness?

 

What are the wire colors in the open plug ? A different engine harness may make your wiring a little easier, but you have to understand that the basic engine function should work regardless of whether you have an OBD-1 or OBD-2 style engine harness... the dizzy, injector, TPS and MAP wiring will be in the same place in the plugs (unless you have a car with a firewall mounted MAP sensor, and I am not aware of any Del Sol's with that type).

 

 

I dont know much about integras, what motor is in obd2 integra, Its my understanding I need an obd2 96-97 del sol harness because they plug in at the shock tower and all other obd2 harnesses are one peice. cheapest del sol b16a2 harness Ive found is 300 bucks

 

Not all, might want to do a bit of searching on how similar the eg civic is to the dc2 integra.

 

I know I see people on here that swap obd2 b16a2 into obd1 shells and the plug right in so it makes no sense the reverse wouldn't work obd1 motor into obd2 shell. One way you have an extra plug on the engine harness and on mine there's an extra plug on the chassis harness but those shouldn't be required

 

I dunno if you answered this question in the other thread but why does your CEL not work?

 

I really dont know Im guessing I need the obd2 engine harness. something is clearly not working. Seems like your the only one who responds here. I came here for help and got more questions than answers

 

The closest thing you'll find that may work is a 96-98 civic ex harness.

 

I dont think that would work at all since the 96-98 civic is a one piece harness and del sol is 2 piece. I was hoping someone who actually did this swap could say what works without guessing because its really getting me nowhere to be honest

 

If you are talking strictly Del Sols... you are correct. IF you are suggesting that a '99-00 Civic Si B16A2 will plug into an OBD-1 Civic chassis... NOPE, not even close. Only '92-95 Civics and '94-01 Integras have engine harnesses that plug in at both shock towers and are VERY SIMILAR in the wiring order of the plugs. The Del Sol is kind of a bastard child because different model years utilized different harness types... USDM '94-95's were like yours with the Civic and Integra types listed above with engine to chassis harness junctions at each shock tower and the '96-97's were more like the '96-98 Civics. Yours appears to be like a '94-95... and yet you state it is a '97. So, did someone change the chassis harness or is your car from another market or just an oddball ?

Besides where it terminates, there are three basic differences between a 1995 OBD-1 Del Sol VTEC engine harness and a 1996 OBD-2 Del Sol VTEC engine harness: (1) The distributor plugs; (2) The fuel injector clips; (3) The OBD-2 harness has the CKF plug. Now, where you are totally confused and having difficulty grasping is that the engine harness doesn't have to STAY with the original engine. This means that your OBD-1 engine can be installed into your OBD-2 Del Sol with an OBD-2 Del Sol VTEC engine harness and you can choose to swap in a set of OBD-2 fuel injectors and an OBD-2 B16A distributor and leaving the CKF sensor plug unplugged near the alternator (assuming you are going to use an OBD-1 ECU that doesn't recognize this sensor) and harness modifications are necessary and it will run fine. You can use the OBD-1 engine AND OBD-1 engine harness and plug in the engine harness as you have at each shock tower... leaving the CKF plug on the passenger side shock tower open as this sensor will not be recognized by the OBD-1 ECU, and the engine will run just fine. Ultimately, there is more than one RIGHT way to do this. I always suggest that you keep the original engine harness from the car and MODIFY it to fit the new engine that you intend to use... adding/changing/shortening/lengthening the wires and plugs/clips to fit the various sensors and devices on the engine. The advantage in doing this is you take out the difficult discovery of wires that do not pass through the shock tower plugs in the same place as other applications. If you know that those plugs are all correct, you can easily SEE where everything goes in the engine bay and can make those items work.

Nope. Not necessarily... although this would be an excellent choice on a USDM Del Sol.


OP - Help us help you. I asked you to post a pic of the wires in the loose plug... what you provided is a blurry, flash-blind photo of the plug without TELLING those you have asked for help what the dang wire colors are.

 

No its not an oddball its a stock 97 si del sol. All 93-97 del sols plug in at the shock towers

 

all 93-97 del sol have 2 piece harness that plugs in at the shock tower

 

My setup is obd1 b16a3 with the b16a3 engine harness, obd1 p30 ecu with obd2a to obd1 jumper in the obd2a chassis. I took everything from a 94 del sol vtec into a 97 del sol si except the cabin harness. The only variable here is the 94 vtec cabin harness vs the 97 si cabin harness. It all appears to plug in correctly. My question is pretty simply simple. My setup either should work or should not work as it is. If My overall wiring setup is not correct then can it be modified to work or do I need the obd2a 96-97 del sol harness?

 

automatic del sol, forgot to add that.

 

criss cross tps and map plugs, tps damaged, no CEL.

 

Honestly I would just install the entire b16a3 cabin harness and just be done with the bullshit already if you're having this much trouble. I don't have my 96 in front of me but I thought it had a separate engine harness.