fromthesun_93

I have a '93 Del sol with a GSR swap, it has no vtec, most likely because the ECU is not the right one.

So i'm wondering what kind of OBD the vehicle is. I'm also not sure if it has a conversion harness. If so where would i find it?

Another question.

When doing an engine swap must you always make a conversion of OBD specifying to that engine? In this case like my Del sol with a GSR

Feedback greatly appreciated

grumblemarc

iTrader: (4)

What ECU is in the car currently?

fromthesun_93

No clue. Ima go take a look and see if it has any stickers or numbers.

fromthesun_93

found a bar-code sticker bunch of numbers but in between two dashes it has 'P06', now i know most ECU's start with a 'P' so maybe this is it?

twizted-myatt

D15B7

Found in:
1992-1995 Honda Civic CX (Canadian model)
1992-1995 Honda Civic GLi (Australian model)
1992-1995 Honda Civic DX/LX
1993-1995 Honda Civic del Sol S
1992-1995 Honda Civic LSi Coupe (European Market)
Displacement : 1,493 cc (91.1 cu in)
Bore and Stroke : 75 × 84.5 mm (3.0 × 3.33 in)
Compression : 9.2:1
Power : 102 hp (76.1 kW, 109 ps) @ 5900 rpm (102 hp @ 5900 rpm in U.S.)
Torque : 98 ft·lbf (13.5 kg/m, 133 Nm) @ 5000 rpm
Valvetrain : SOHC (4 valves per cylinder)
Cam Gear: 38 Tooth
Piston Code : PM3
Fuel Control : OBD-1 MPFI
ECU Code: P06
Head code: PM 9-6

B18CivicEJ8

Your vehicle is originally OBD1. OBD stands for on board diagnostics. The OBD version is determined by the ECU. For example, your GSR engine can come out of any 94-01 GSR (which can be OBD1, 2A, or 2B). As long as you use the same harness from whichever car the engine came out of, it will plug up to any 92-95 civic. Not really anything to do with OBD, in this case, it's just that the design of the harness in an Integra splits at the shock towers just like 92-95 Civics. That's why those year cars are so popular for swaps because it's plug and play. Now the engine itself may have parts (distributors, alternators, and secondary O2) that belong to a specific OBD version, but that doesn't mean that it isn't backwards compatible. What I mean by that statement is that in you car you can run an engine and harness that came out of a OBD2B car but run it on an OBD1 ECU. That is what most people do in your situation. Now if you can grab the part number off the side of the ECU, we'd be able to tell you what OBD version you are running.

fromthesun_93

Well it looks like im running that ECU on a GSR.

So what ECU do i buy? From where? And if so, should i tune it?

grumblemarc

iTrader: (4)

Check this link.
What year is the engine?
You definitely have the wrong ECU. Who did the swap?

B18CivicEJ8

You are running a non-VTEC ECU. You should be running a P72 if you have the original GSR intake manifold. Please post a pic of your engine and we'll be able to tell you that. Also, you may want to crack open the ECU to see if it has been chipped. If this ECU is virgin, meaning it hasn't been chipped and tuned, then you risk destroying your motor.

fromthesun_93

You mean the numbers above the bar-code correct?

B18CivicEJ8

Yes, as I was typing that response, I noticed several replies. I know you are running a P06. Now we need to determine if it has been chipped and tuned with a GSR basemap or not. If not, that is definitely the wrong ECU for the car. The right one is a P72.

fromthesun_93

Wow. Never knew running a swap w/o proper ECU/chip/tune could destroy engines.

Reply to Grumble - I don't know who did the swap, but the year of the engine is most likely a '95. Right above the headers it has 4 pairs of 2 digit numbers. The first pair starts with 9|4 so i figured its a 95.

Reply to B18CivicEJ8 - I'll try right now to post some pics. Before i open the ECU, is it okay to just disconnect the ECU w/o harming anything?

B18CivicEJ8

Yes, it can destroy the engine cause the P06 is for a D15 engine. That D15 is a 1.5 liter SOHC non-VTEC engine. The fuel maps on that engine are totally different than your 1.8 liter DOHC VTEC engine. You have more displacement, you need more air/fuel. If that P06 is stock, then you are running lean. That is why I said we need to find out whether or not it's been chipped and programmed with at least a GSR basemap. You should unplug your negative battery cable before you remove the ECU.

fromthesun_93

Aite. Going to upload pics in a bit.

When i open the ECU, what am i looking for in particular?

B18CivicEJ8

Here's a link that shows the process of chipping an ECU:

http://www.performanceforum.com/wesv...chip/chip.html

In particular, if you open the case and hold the ECU with the connectors on the left side, in the bottom right-hand corner should be a ZIFF socket and a chip in it. It should look similar to the pics above. Just google OBD1 honda chipped ECU and compare the images with what you have. If there is no chip, then it's stock.

fromthesun_93

http://i1196.photobucket.com/albums/...0526111849.jpg

http://i1196.photobucket.com/albums/...0526111848.jpg

B18CivicEJ8

Sweet. You are running a GSR manifold. So that means the current ECU you have, the P06, doesn't have the capability to run the intake air bypass valve on your intake manifold. The GSR intake manifold is a dual stage design. That's why it looks like that. There's a valve inside the manifold that opens when you are at high RPM, 5750, to allow more air in. It's closed in the low RPMs to give you more low end torque. The point is, the p06 doesn't have the circuitry in the circuit board to operate the IAB. The P72 ECU is designed for the GSR and you should get that ECU. You'll notice that your engine runs better with that ECU. Just go on ebay and get an OBD1 USDM GSR ECU. You won't need a jumper harness, that ECU will be plug and play. I also doubt that the people who swapped that motor in wired up the IAB. You'll need to wire that up, too. There's write ups on how to do it. Just search here or google.

The reason you don't have VTEC is because the P06 is a non-VTEC ECU. Get the right ECU, you'll have VTEC and IAB working together.

fromthesun_93

Thanks man. Appreciate it