kahren

i have the same problem, the car idles weird, and the idle speed is anywhere from 400-800 rpm also the car seems to have more power sometimes when driving it would kick in and feels liek another 10 hp came from somewhere. i am using one oxygen sensor from a crx, stock '89 crx ecu, stock si engine harness, i do not have any of the imission stuff hooked up. is it ok to leave the charcola cansiter gas tank return line open? i tried new plugs, wires, dist cap , rotor, fuel injectors...nothing seems to work, i am gonna check the fuel pressure tomorow to see if i the fuel pump is functioning properly. if anyone has any ideas please post


[Modified by kahren, 7:14 PM 7/10/2001]

max

kahren, i have an idea. u seem to have a problem w/ the engine. but i think the real problem is the wrong car for the b18 motor. now if u had used a '96 integra, u'd prolly have a better chance. try that and tell us how it worked out.

memphiss13

how are you using a crx wiring harness and ecu with an LS motor. that can't work. this doesn't sound right at all. get a new ecu and wiring harness. do it right. you can't cheap out on a swap, EVER. do it right once so you don't have to do it twice.

kahren

every one i know uses a stock crx harness the injectors are from a crx so tehy match up to teh harness and since tehy are teh same flow rate as integra injectors it works out perfect and the integra ecu only has better fuel mapping somwehre around the midrange

rioninja

The injectors may work, and the stock CRX wiring harness is fine, but you definatly need to use an integra ecu. Get an ecu from a 90-91 LS (not 92 or 93 because they have OBD), and it will plug right up. Also, did you hook up the map sensor? i don't know about the charcole canister, but you DEFINATLY need to hook up the map. Do you have open holes on the back of you intake manifold? IM me for further help. I have done a B18 into my CRX so i know whats up.

raene

I think skipping installation of the MAP sensor would cause the car to throw an engine code for one, and for another to stall... I might be wrong though?

kahren

yes i do have the map hooked up, the only sensor i dont have hooked up is the one next to the map sensor on teh firewall, but that was when original motor wasin teh car on this '96 ls motor that sensor is on the intake manifold and i do not have it hooked up, also there was a sensor on teh crx intake manifold it was toward teh right side in teh back on teh underneath side and i have a wire hangign off the harness unplugged because teh integra manifold does not have such sensor. and yes teh car would die if i didnt hook up teh map. i also just cahnged the rotor , cap and pcv valve, the lag seem to go away a bit but still there and idle is still at 400 or so. please help! [IMG][/k:/misc/cars/crx project2/pics/misc/dsc00021.jpg]

kahren

[Modified by kahren, 7:41 PM 7/10/2001]


[Modified by kahren, 7:42 PM 7/10/2001]


[Modified by kahren, 7:42 PM 7/10/2001]

raene

Looks like that sensor was the IACV.

fuguman

what you need is a supercharger, then u will get rid of the slowness problem at low end

Tbone

From the motor pic it looks like you have a crimped radiator hose, you might want to fix that.

kahren

anyone think the oxygen sensor can do this? the check engine light doesnt go on but the o2 might be going bad? also sometimes it smells like gas in the car i will have to check the fuel pressure

Doodoo

The sensor you are describing sounds like the IACV alright. Make sure that is hooked up on the back of the manifold. Try turning out your idle screw as well. Worked for me....95 LS in 88 CRX.

kahren

isnt the intake air control valve on the left side of the intake manifold on the back next to the TB on crx IM, on the integra manifold there is no such sensor

kahren

went to lebanon yesturday best time of 15.175 but there is only aem cold air and a apexi n1 style muffler. i know the car is not running 100% the bog is still there i am sure i can run atleast a flat 15, th etrack seemed a little slippery.

Senses Fail y0!

OMG OMG OMG OMG dude you dont use your stock CRX ecu with a B18b LS motor. you need to get the LS ecu. or at least an ecu for a ZC motor.

Doodoo

I would have to take this suggestion as well. Get you a 90-91 Teg ECU. Plugs right in like described above. It has the correct fuel and timing maps unlike the SOHC ECU.

kahren

i tiried my friends 90 ecu with skunk2 program or something like that, still same effect midrange has alittle more juice but the idle is still very low, when i am driving and i take it off a gear and leave it in neutral the rpms fall off to 700-800 and then go right back up to about 1100 and ten fall down to about 400-600. it could be valve lash as well, once on my stock d16a6 motor the valve clearance was set wrong and it cause the motor to operate close to this one, so i will have to check that, and i guess this friday i am gonna borrow a fuel press guage and see whats up there, and maybe get a b&m FPR....help!

fixhondas

Well, for starters- you are using an ecu for a 1.6 liter engine on a 1.8 liter engine. This is not good. It probably runs worse at WOT, right??? You need to get proper engine controls unless you increase fuel pressure or pulse. Can you say LEAN??

kahren

i was puttign a FPR hose on my other crx today that i am puttign together and i noticed that the piping diameter on the crx FPR hose is larger then the on on the integra fuel rail, i think that that can affect the idle i will look to see if a crx fuel rail will fit so i can use a bigger FPR without going aftermarket...sugestions?

Tbone

Are you talking about the vacume line on top of the fpr or the return line to the tank on the bottom?

kahren

the return line to teh tank on the bottom

kahren

...tried pinching the vacum FPR hose the bog seemd to go away just a bit, now i am thinking there is not enouf fuel pressure?...maybe i am not gettign enouf flow? the crx motor wastes just as much fuel as the integra, the idle mapping is almost identical , even with my friends '90 ls computer it still runs the same...though midrange is improved, i am gonna try to find LS computer. when i drive sometimes the car feels liek ther isnt enouf power and tehn all of a sudden its like a turbo kicking in... ahhhh what do i do?!

kahren

just changed teh fuel filter and rotor cover, car seems to have a littel more pull, idle went up just by a bit throttle became a littel more sensative

Doodoo

If your are worried about the return line, dont. I was using my CRX return line with the '95 LS regulator just fine. Sounds like you should go back to the basics like check timing, TPS position, idle screw, bleed coolant. Those type of things. You might find something off. I spent almost 4 months re-checking and fixing things after my swap. Be sure to run that 90-91 LS ECU.