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need help on a b18b1 in crx please help.

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Old Jan 26, 2015 | 10:50 AM
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hondABcrx_'s Avatar
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Default need help on a b18b1 in crx please help.

Not sure if this is in the right spot. I have a 91 crx with a b18b1(obd1). When i first got the car it ran great With no problems. 2 weeks ago it started to act up and a cel light came on but the car was running perfectly fine. i pull back the carpet where the ecu is to check codes(ground the wire and count flashes on dash) and find a huge mess of wires. basically the p.o did a home made obd0 to obd1 conversion.(Wires falling out of random spots) got a code 7 but car still ran great. I go online and order a HA motorsports obd0 to obd1 conversion harness. I plug that in and it would crank but wouldnt start. So i investigate the engine harness to find another hack job(Wires hardwired into the chasis from distributor, all 4 injectors hardwired into the chasis too. So to hell with that harness. I got a ride to pick up a obd0 b16a harness. converted the distributor plugs correctly, resistor box is capped on the home made hardwired injectors, but not on the engine harness side. still nothing ( no spark) Gave a guy $300 to come look at it and fix it as he said it was simple. He repined 2 wires correctly on the distributor according to him(blu/ylw and blu/grn) and put the wires back that were cut on the chasis harness back to the stock locations. got the car to start the next day but idles at 500 rpm if that. I give it gas and it dies. If i reset my battery i get a code 6 and 10. If i get it started it will trip a code 7 along with the other codes. he said he did everything right. But with how he couldnt figure out how to readjust my tps it threw up some red flags and got me thinking that this guy doesnt know what hes doing As adjusting a tps is a pretty straight forward task. Im a lost dog when it comes to any type of wiring but can do a little like adjusting a tps. So basically i paid him 300 to look on google charts, he dipped out cause i payed him in full and left it to me. He says its the harness and its been modified; but when i bought it it looked pretty damn stock and unmolested to me. Im at a loss and cant figure it out. Any ideas?
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Old Jan 26, 2015 | 06:37 PM
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Default Re: need help on a b18b1 in crx please help.

It would take you an excruciating amount of trial and error to figure it out for yourself if you're not familiar with wiring, electricity, sensors, or a multimeter.
90% of the OBD0 harnesses I see are completely butchered. It takes a lot of work to diagnose, rewire, and test your repairs.

I'm somewhat of a renowned expert in Honda wiring, but if you aren't in Colorado and don't have a reputable wiring guy in your area, I would just start over with a new unmolested harness.

If most of the hack job is on the chassis side, match color for color and compare it to a pinout diagram on PGMFI.org.

PS try to use paragraphs so we can read your posts easier.
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Old Jan 27, 2015 | 04:25 PM
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hondABcrx_'s Avatar
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Default Re: need help on a b18b1 in crx please help.

I do live in colorado. And i gave up and letting a master tech at work figure it out. gonna loose a lot of money on a less than 200 conversion cause everyone and thier mom thinks they can wire cars here. the guy i hired put the wires back on the chassis harness side except the injectors.
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Old Jan 27, 2015 | 04:31 PM
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Default Re: need help on a b18b1 in crx please help.

Originally Posted by hondABcrx_
I do live in colorado. And i gave up and letting a master tech at work figure it out. gonna loose a lot of money on a less than 200 conversion cause everyone and thier mom thinks they can wire cars here. the guy i hired put the wires back on the chassis harness side except the injectors.
How are the injectors wired. Resistor box setup? You said you know how to adjust your toe, have you already calibrated that? Is the low/dying idle the only issue your having or are their other symptoms?
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Old Jan 28, 2015 | 06:14 AM
  #5  
hondABcrx_'s Avatar
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Default Re: need help on a b18b1 in crx please help.

all 4 injectors are running off the chassis harness to obd1 clips(grey) on the motor with a capped off resistor plug except the ylw/blk wire. The resistor plug on the engine harness isnt capped off or grounded out though.

i tried to adjust the tps and i couldnt get it to read right. i bought it new 2 days ago. Had the meter set to dcv200, swapped the two end wires and it was way more than what it was before so i put them back.

I had to hardwire a wire to the ylw/grn wire on the distributor to a white wire on the chasis harness to get to even get it started. When it was started, and i would rev it up, the rpms wouldnt go past 25-2800 rpms. Im assuming its because my injectors werent putting out the full 12v but im not sure
Not sure if i mentioned that the old engine harness was all hacked up so i ended up buying A complete stock obd0 b16a harness And only converted the distributor plugs
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