Hello..

I have a '91 CRX Si b17a1 that is converted to OBD1 using Phearable.net P28 Spec ECU tuned basemap for my setup (which is just header back CAI), no o2 or knock sensors, no cat. My car is running extremely rich. I have checked over a lot of things like the sensors, plugs, wires, dizzy etc..TIMING is good, plugs were new, replaced a couple sensors, replaced the dizzy w/ obd1 dizzy. Is there anything else I need to replace? Like the injectors? I notice it has a resistor box and all so I assume it runs obd0 injectors. (I don't know EVERYTHING about this car yet, it is still sort of new to me.) It could have bigger injectors in it for all I know..and there is evidence that the car used to run a turbo. (front bumper is cut out to fit an inter-cooler etc.)

The ECU was throwing bad TPS sensor so I replaced that and calibrated it. There are NO codes being thrown.

Since the car and engine is OBD0, and I converted it to OBD1, would I need to do anything with the injectors or MAF sensor? I don't even see a MAF sensor..am I supposed to have one? The IAT sensor is good...I am stumped. My last resort is to drive to a tuner shop, which i don't want to do because my car is running so rich that after awhile it fouls out so bad that I have to take out the plugs and douse them with starter fluid just to get the car to run for a bit.

ANY suggestions are appreciated!

 

basemap
Get a tune.

If it still has a resistor box then you are probably on to something thinking they are still the injectors used for the turbo.
That may be why you are running rich.
Depending on the turbo setup, it would probably be running REALLY rich.
If the basemap was made knowing what injectors were installed, then it should be able to run a lot less rich if not perfectly.

there isn't a MAF sensor on a honda, only a MAP sensor.

Pics would be great.

You sure you turned off O2s completely with that basemap?
I don't think that's a wise move.

 

it IS running REALLY rich. i have no cat or O2 sensor, so that is what I told phearble to tune my ECU for. i could add an O2 sensor, but i really don't have the money to buy an O2 sensor and then buy another chip from phearable..if I could get the car to at least run on this set up would be nice, then I could go to a local shop and get it tuned good. I meant to say MAP.

What do u want pictures of? I can take a video too...right now the car won't start, unless i take out the spark plugs and clean them off really good..

 

this is probably a dumb question, but I have a '88 crx Si w/ d16a6 in my back yard (parts car) that has injectors..could I try those in my b17 crx?

 

hmm i found a thread on here that says they are the same volume so i'm going to try it out and see if the car runs better. i will post here after i run the car.

 

also..the car had a 89 Prelude Si computer in it when I bought it (car was running like ***). makes me think they just removed the turbo system and put a CAI on and just left it...I have since replaced the ECU and everything..maybe I have to delete the resister box and put in stock injectors..HMM! any thoughts?

 

also the car has a brand new exhaust system on it which also explains that it use to run turbo..would i just be okay swapping the injectors? or do i need to delete the resister box as well?

 

i went outside to examine the injectors and fuel rail area..I took a few pics and here they are:

 

i can get some better pictures tomorrow in the day light...but the injectors look to have been tampered with.

 

Well, I pulled out the injectors about 10 minutes ago and the numbers read: MDL450. After searching that # on these forums I have identified them to be from a 2G DSM Turbo!!! I think this is what my problem is haha...so now I just have to put the injectors from the 88 crx si in and then what? do i need to do anything with the resistor box or anything?

 

You leave the resistor box in the system.
Wire in the Si injector clips for the Si injectors.
Pull the rubber injector seals out of the intake manifold and replace them with the Si's - hopefully they fit the B17 manifold.
(DSM injectors are a little fatter and it's common to open up the seal with a Dremel and sanding bit to get them to fit).

O2 is pretty key to a properly functioning street car.
Consider adding the primary one when you have a chance.

 

ok. here goes nothing..i hope the seals fit. if they do not, should i replace them with new eclipse turbo o rings? also the injector wires didn't look cut so maybe they just plug right in to the si injectors...

 

Well, you are planning to remove the eclipse injectors so you won't want to use eclipse seals.
Ideally you would want B17 injectors and seals - best you got now is D16 injectors and seals.

 

the dsm injectors are obd0 if they use a resistor box, so the d16 injectors will plug right in to the pluggs you have now. so basically just swap injectors and rubber gromments off the intake.

 

the idiot before me used the stock b17 injector seals and just cut them out with a knife. i just used the d16 seals, put oil on them, and they worked just fine.

the car is crazy. it brought a big smile to my face.

now the car idles at like 2k right now so that is kinda gay. but i'm sure its just an adjustment need to be made because the car idled fine with 450cc injectors.

also it grinds in 3rd @ WOT..syncro?

but i'm just so happy the car runs really good...only weak part was at like 3k RPM in 3rd gear when i stomped on it, but i'm sure the car has a lot of carbon to burn out..i'm going to buy some sea foam tonight.

time to start dumping 1,000s of $'s into it. :D

 

cool - good you got that beast running!


for a quick fix on that tranny you might be able to get away with changing out the tranny oil and putting in some GM synchromesh.