I8ayellowcrayon

I'm working on a 99 Civic Si that I just finished putting an OBD0 B16A engine in. I'm using the OBD2 intake manifold, OBD2 P2T (B16A2, factory) ECU, and I have spliced the CMP and CKP wires together. I had an OBD0 LS/VTEC setup in the car before, and everything was fine with the stock ECU (would start but ran lean, obviously) and with a reprogrammed P28 I have. I drove the car for 6 months with no problems.

So I put the B16A in, and I'm getting a code 6 (ETC), code 10 (IAT, which I had unplugged when I first tried to start it, it is now connected), and a code 22 (VTEC system). At first I assumed that maybe I had the VTEC solenoid connecter mixed up with the ETC sensor, switched them, and nothing happened.. Switched them back because I think I had them right the first time.

The fuel pump turns on, but the injectors are not spraying fuel. It only sparks sometimes. I checked the CMP/CKP splices, and they're still good. All of the grounds seem to be good (when I loosen the one on the thermostat, it kinda sparks if the key is on)....

I'm stuck... I don't know what else to look for.... Any suggestions??

count me out

check voltage at injectors. are you positive the timing, cam and ignition, is correct?

longshot

i was having the same problem with my car, with the injectors not spraying but the fuel pump coming on,

i swapped out the engine harness, cuz the ******* i bought thhe car from hacked it up, and now my car runs fine.

I8ayellowcrayon

Battery voltage is present at each injector. I don't have any noid lights here to really test if they're getting a ground signal, I'm just guessing because there is no fuel smell on the plugs, and they're all dry.

I'm assuming that the engine harness is good, its never been hacked on other than what I did next to the ECU for the CMP/CKP thing. I left the harness on the intake manifold when I was swapping everything to the B16 motor, so I don't really think it was damaged in the process..

longshot

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I8ayellowcrayon &raquo;</TD></TR><TR><TD CLASS="quote">other than what I did next to the ECU for the CMP/CKP thing.</TD></TR></TABLE>

CHECK THIS. check for bare, or loose wires, solder and heat shrink any connections, problem might be solved then.

I8ayellowcrayon

I've checked and double checked. Both solder joints have continuity with the ECU at the pins.

count me out

try undoing the ckp sensor joint and see if it starts. maybe you tapped into the wrong wire?

I8ayellowcrayon

But it was running fine 4 months ago with the OBD0 LS/VTEC, and I haven't touched it since except for a couple hours ago to test continuity. I know I have the right wires, and they have continuity from the joint to the ECU. I guess I could test to see if I have it from the sensor to the ECU...

Poppin

Up.

7601chexplicit

you need gas.

civacman

have u checked ur distributer the distributers r different for obd2 and obd0

Poppin

Its the same OBD2 distributor that was on the original motor and the LS/VTEC motor. I haven't confirmed if everything in it is still working though - its only been sitting for 3-4 months though, on a table in my garage.

And the car has 1/4 tank of gas in it. I loosened the pressure hose on the fuel rail, and confirmed that I have plenty of fuel pressure

Poppin

BTW, I'm I8ayellowcrayon posting on my friend's account. I'm at work and for some reason I can't logout of his name.

Poppin

Nothing new....

Anyone else have an idea? Something to check at least?

I8ayellowcrayon

I had the P28 installed and tried it again... After a few seconds of cranking, the ECU started smoking pretty bad. Took the cover off, found that Q31 capacitor(?) was fried! Did a quick search, and found this thread -

https://honda-tech.com/zerothread?id=2287631

and similar threads. On my car, the IAT connector is between the MAP connector and distributor connector, and I know that I haven't connected it to the EVAP purge solenoid, or the IACV for that matter (different connector for IACV).

Just for ease of mind, I checked the resistance value of the IAT and it showed 2041 Ohms!!!!!! I made sure that the setting was correct on my DVOM, and it read 2.04 k Ohms... I unplugged the IAT and it still wouldn't start, on the P28 or the P2T ECU....

I'm so lost.

count me out

holy **** thats a lot of resistance.

i would try undoing the ckp mod.

I8ayellowcrayon

I did today, with the intentions of resoldering it, but i just have them twisted and taped for now until I figure this out. Understand though, that its not going to run on the OBD2 ECU with this undone. I tried to start it with the P28 undone and nothing changed.

Yeah, that is a lot of resistance. I'm not sure what the deal is with that, the part isn't even a year old.

count me out

you have something really crossed with your wiring, but im sure its just one small thing youre missing, always is.

sit back and think about every wire youve done something with between now and when the lsv was running.

recheck all of your harness plugs and really go through your wiring.

since it seems the only thing youve changed is the ckp wires, id start with that and be sure you have absolutely crossed the correct 2 wires.

I8ayellowcrayon

The CKP wires were done when the LS/VTEC was running, as it was an OBD0 motor as well. That was done maybe 8 months ago, and I drove the car like this with no problems for about 6 months. All I have done differently is just disconnect and reconnect the connectors from the motor.

But again, I'm completely lost, so thats probably my next step...

JDMjimmy

really sounds like a wire is crossed, I had this problem and all i did was undid the CKP joint and it started so i had a wire crossed in there somewhere. Just double check all the wiring one by one, I know its a pain in the *** but its really all you can do.

civacman

what ecu r u running

I8ayellowcrayon

As stated, I'm using the stock P2T (OBD2 B16A2) and OBD1 P28 with stock B16 program (using Rywire conversion harness).

Both of these ECUs were fine whenever the LS/VTEC was running.

I'll probably rip into it tonight... I'm getting sick of seeing it just sit there.

I8ayellowcrayon

Figured it out. I guess one of the guys helping me got in a hurry while putting on the distributor and broke the two pegs that fit into the cam (to drive the distributor). Swapped one from a SOHC (thanks Honda!) and it fired up first time.

Thanks for all the help! Its for sale now! :D