slob20ef

Ok so i recently swapped a jdm d15b into my 1989 crx dx. First of all was the dpfi to mpfi swap i got the car running but was running terrible. I swapped out the obd0 intake that was put on it(previous owner) for z6 IM and TB also changed plugs and wires. Now it does run alot smoother but still is in limp mode i do believe. Im throwing code 22 and 19, auto transaxle and vtec pressure switch. Ive swapped out 3 dizzys now, and 2 p28s mines auto my buddys is 5 spd.. No difference, checked all grounds tons of spark and fuel. Im not too sure were else to start, crank/cam pos sensor? all my vacuum lines are right and sealed. it will rev clean but acts like its hitting a 2 step at 4500. Its a virgin p28. Kind of stumped right now, any advice?

dephtone

Code 22 is because you have an Automatic ECU when your car (I'm assuming) is a 5 speed.

Code 19 is your VTEC Oil Pressure switch. Do you have this wired into the 1 wire VTEC solenoid?

slob20ef

Yea car is 5 speed. I don't have vtec wired up yet wanted to get it running right. I'm not worried about those two codes right now just not sure where to start with the car revving to 4500

Projekt_Ef9

My Ls did the same thing at four grand it ended up being the cylinder position sensor wiring between the ECU and the distributor. I rewired it at the ECU and havent had a problem since.

4drEF

There is no way you can get a code 19 if you don't have an auto ECU. Either you are reading the code wrong or both of you have an auto ECU.


Hook it up and maybe code 22 will go away.... and maybe it will act correctly when you hit 4500. That's the stock vtec engagement point so your ECU is freaking out since you don't have vtec wired in.

slob20ef

I wired up vtec. Code went away but still wont Rev overb4500 I also double checked crank angle sensor and cylinder position sensor. Everything is fine but just ***** and gigs I swapped the wires around on both sensors and no change. I do not have o2 sensors hooked up but I've ran cars without them before and never had a ecu go into limp mode. Any other ideas?

slob20ef

Maybe leaning toward clogged cat. Car has been apart for two months no it ran fine before I did the swap swap but my 4dr Ek had very similar problems with a clogged cat

slob20ef

bump. any more ideas?

4drEF

Does the engine free rev (in neutral) to redline?
What codes are you getting now?

Why don't you run an O2 sensor?
Without the O2, you are taking out a key component that controls how much fuel the engine sees. Basically you are robbing yourself from power. I could understand running no O2 if you had a tuned ECU for a race engine, but you don't... you have an untouched P28.

slob20ef

because i dont have a 4 wire 02 sensor laying around. still cannot figure this out when i first start it, it will rev to 7200 but after about 2 seconds of running it wont go over 4000-4500 i reset the ecu, no change still only getting code 19.. triple checked dizzy wiring, its good. im really getting sick of this..

4drEF

Very odd you aren't getting an O2 error at all.
That has me thinking something is really wrong with your wiring.

Anyway, you can clear that code 19
http://wikitest.pgmfi.org/twiki/bin/...egraAutoManual
"remove RP17 and RP18
replace RP18 with a jumper wire"

slob20ef

i am going to do this, also the iacv wiring is not present so i hardwired it, still in limp mode, i cannot figure this out for the life of me, im going to wire up the upstream o2 sensor tomorrow. dizzy is fine, wiring is fine, injectors are all working.. any other opinions?

dem510z

ok i have a 89 crx dx with a d15 motor but i swapped out a si ecu and intake manifold and my car wont go over 3000 rpm should i change the distributor ? from a si motor or something is up with the wiring ?

slob20ef

check engine light on? did you convert to mpfi? you need a si dizzy which you would have to run two wires from the ecu to the new dizzy plug.. look up dpfi-mpfi, sounds like wiring issue. Bad tps?

slob20ef

all fixed.. so i got sick of messing with this car, so i tore everything apart and started checking all the wiring with multi meter. I came across the the dpfi to mpfi write up i used and double checked everythng, realizing that the chart read. Inj1. Inj.2 Inj.3 Inj.4 and didnt realize that i had wired the injectors like this starting at the dizzy side.. Meaning they were backwards, As The dizzy side counts inj.4, inj.3 ect.. Thanks for all help guys!

MikeyGalaxDA

Im having the same problem, the cel is on, wont rev past 4000, and idles up and down when in neutral??

MikeyGalaxDA

I keep getting a bunch of different answers but no one is actually explained it to me.

MikeyGalaxDA

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