gary_yuen42

Just done the MPFI conversion on the D15B2... first it didn't start because the fuel system wasn't pressurised yet... then start briefly... then it wouldn't start..... swaped a working fuel pump relay now it starts... idle ok but a tad low... can feel the rumble when heater and rear screen heater on... anyway that out the road... here is a problem I am trying to solve...

It throws a Code 13 which is the Baro Sensor from what I gathered...... How can this be fixed? I tried pulling out Hazzard Fuel and ECU back up fuel to restart the ECU but it stays on. It comes on when the key turned to ignition position, the CEL off for a breif second or 2... then it stays on constant.

The Car drives fine and can rev up no problem just the lights comes on. The sympton described above is when I am using a PP4 G01 which is a UK Rover (Honda Engined SOHC D-series) Just standard ECU not yet chipped.


Then I tried plugs in a PM7-E04 ECU which was from a EDM EF with the DOHC D-series.... it throws a code 13 then 11, other then that the same syptom but the code 11 only comes up along with the 13 when the PM7 is used but only code 13 when I use the PP4 ECU.

Any idea guys?

Tom-Guy

Some of those ECUs have a baro (also called AP aka Atmospheric Pressure) sensor either on the motherboard, or underdash near the ECU. My guess is (MPFI conversion errors aside, which I doubt you've made) your car has no underdash AP sensor and the ECUs you are using are looking for an external AP sensor.

I'm pretty certain AP sensors for USDM cars are the same things as the MAP sensor, which means it's the same for you. It shouldn't be hard to find/wire one in, check the manuals linked to in this forum if you need some wiring diagrams to help you out.

BTW, my 89 CRX HF had some strange wiring.. it's a MPFI car, but running something other than the HF ECU gave me code 13 and wierd idle variances whenever I hit the brakes or actuated the brake light switch (also feeds to the ECU on the HF). My cure was to cut a few extra wires that weren't used by normal MPFI cars. You might check to see if your car came stock with some wierd no-longer-used sensors, and remove those pins from the harness.

Hey, it's nice to see a new guy manning up and doing MPFI conversions. Most people get all skeered by 6-7 wires. Best of luck to you.

gary_yuen42

Yea been trying to look for it in the car today briefly couldn't find it. Have to say our ECU is on the left hand side of the car, since we are right hand drive.... so i was lookin on the same side as ECU but couldn't find it, will have another look tomorrow more in details. However I checked the pin out table for the P04 and the MPFI ECU, for the PA sensors the wiring is the same location, so nothing is changed. Unless the P04 have one within the ECU?

Will also check about the sensors that is not in uses as well.

Thanks for the comment... but have done research for 1.5 weeks to find the right write up, as most just done for the US model... as we get this EG with D15B2 oddball in UK... eventually found the write up by 1net on pgmfi.org for the this but also referenced to the write up you can find in the honda forums for US model. Then 2 weeks chewing everyword over and over again. Then order the parts get the spanners ready and get right dirty... as I got this hatch for cheap and I got my daily ride a EG9 so not worry about blowing it up (TOUCH WOOD)... and not able to get to travel :P

88crxSi

on usdm civics 88-91 it's on the passenger side kick panel area.

cmyrex

It on the right side of the area had a good time lookin for it one day.

gary_yuen42

had a look today no luck for the AP sensor...

norwegian cRxXx

I have just done a d15b2 to doch zc swap in my edm 92 civic eg lsi (i have done the dpfi-mpfi conversion)..
It runs great, but i get code 13 (using the pm7 ecu with is the ecu made for the engine).
I have checked the pin outs, and the PA sensor i supposed to be connectet to c9 c12 and c13.
At pin c9 there is nothing but at c12 and c13 the wires are allready there. how am i supposed to connect the new PA sensor? I don't have the new sensor yet, but i will get it soon, and I suppose it has 3 wires.
at c12 and c13 should i just hook them up to the wires that's allready there?

88crxSi

my guess is that your cars came stock w/ the Baro Sensor on the ecu where as the ecus you're using now are looking for it externally.

hit up people w/ junked crx/civcs in the US and you can get one im sure.

norwegian cRxXx

I allready a baro sensor (pa sensor) on the way, should be in my mail soon..

I'm just not sure of how to connect it to the ecu, sice it allready got wires on c12 and c13..

ecu pinout C9 = PA sensor
ecu pinout C12 = PA sensor\ ignition timing adjusting connetctor\TA sensor\TPS sensor\TW sensor
ecu pinout C13 = PA sensor\TPS sensor

88crxSi

c12 and c13 are common between those sensors because they are the 5v reference and common grounds

c9 is the actual sensor input.

i'll find out about wiring colours in a sec.