luispequeno

i have a jdm b16 from hmotorsonline.com

i have done the bypass for the ckf sensor and it starts up. it always throws a code6 no matter what.

i've read and been told that it may be due to my ecu being bad or i may need to convert.

i have the stock em1 obd2b harness in it now and looking to run a p28 or p30. should I go this route? I would prefer this to fix my cel and get my motor out of limp mode, but I would like to run my p2t for emissions purposes (once a yr).

also, i am running obd2 injectors, obd2 distributor, but the jdm oil pump.

please, please help!!

luispequeno

bump... any inputs?

grumblemarc

iTrader: (4)

Why are you bypassing sensors?

94EG8

JDM OBD2 engines don't have a CKF sensor (and adding one requires buying a USDM OBD2 oil pump, CKF sensor and lower timing belt cover) so it's not that cheap to add in. Most guys just tap into the CYP sensor in the distributor to fool the ECU into the thinking the CKF sensor is there.

grumblemarc

iTrader: (4)

Jeez. How do you keep all this straight in your head?

94EG8

I dunno, I just do.

Btw OP code 6 is for the coolant temp sensor. Which has nothing to do with the CKF trick and both OBD1 and OBD2 ECUs will look for it (2 wire sensor under the distributor) check that out and see if it's bad.

EFPhilly

I personally would recommended the p30 (but I use it on S300)

Red_Army

p30. its the one for a b16a so use it.
why don't you just get an obd1 harness seems the much easier and cheaper route.

numberone

iTrader: (2)

P30

94EG8

You guys seem to be forgetting that simply running an OBD1 ECU isn't going to fix the problem at all. OP will still have the very same issue with an OBD1 ECU, unless the ECU is chipped to disable it. Chances are the sensor is bad (they're cheap, you can grab one from just about any D or B-series engine (and probably F/H-series as well) or there's a wiring issue.

-__-

^^he's talking about the temp sensor. and yeah i did the CKP trick on my harness too works great lol.

as far as which ecu, in any situation: USE THE CORRECT ECU for the engine. unless of course you have modified it fairly heavy (cams etc.) then u want to get it tuned.

tlarimer

iTrader: (3)

This, plus you will need a ecu step down to run the P30 OBD1 ecu in your OBD2 car. So you will still need to do this to be able to run your OBD2 ECU once a yr for your emission's testing.

luispequeno

thanks guys, i bought an obd2b-obd1 jumper harness and about to purchase a p30 (the jdm b16).

even more fortunate, its chipped already. i will be buying ectune, to practice on mine and more futuristically tune in my town for cheap

luispequeno

i plugged in a p30 and i'm still showing CEL. when i test the red/white wire, it was showing 3.6v, which i belive should be around 5v. anyone have a clue why its not pushing all 5?

and also, what does the other wire do? what should that one be showing? or does it just pulsate a signal back to the ecm?

luispequeno

any good help out there to give a try?

luispequeno

any wiring gurus? random inputs?

EFPhilly

are you talking about the temp sensor red/white wire

luispequeno

yes, last time i checked it.. it was running about 3.6v, when it should be a 5v wire. then i checked it at the ecm and same numbers.. i now have a p30 but i havent had a chance to see how much voltage is running