1990 crx hf with built b18a1 msd ign. Really hard start surging idle

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Old Jun 10, 2011 | 10:43 PM
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Icon3 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

Hello, I just bought a CRX hf and It has a b18a1 built for a turbo running on a stock computer msd 6a and if I haven't started it in awhile and it's cold it starts very very hard and the. It sputters super hard for 30 seconds then it has the Honda 2000 surge then it going into hunting idle 1000 to 1500. But once and awhile if I let it idle for a long time it settles down at about 1200, but once and awhile it idles down at 7 to 800. But I can't figure it out I heard from so many people that you don't need to run the charcoal canister but that's the only I know how to make it run ok. Or it idles at 2000 when there not. Idk what to do I need help!!!!!! Anybody any ideas??? Oh engine fresh rebuild supposedly.
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Old Jun 11, 2011 | 12:17 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

And it isnt throwing any codes unfortunately... Help!!!
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Old Jun 11, 2011 | 05:59 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

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Old Jun 11, 2011 | 06:25 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

is it only when its cold?
maybe the fast idle thermal valve

other than surging idle does it run fine?
if the idle surges all the time could be the IACV
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Old Jun 11, 2011 | 07:40 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

Yea runs great and when I got it it didn't have coolant or a thermostat and do you know a good way to hook up the vac lines without the canister and cut off valves? Cuz without them idles at 2000?
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Old Jun 11, 2011 | 09:21 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

Is there aresaon why you dont want to run the canister? I had this issue with my b16 when i swapped it...I had the canister hooked up but one a couple of the vac lines were mixed up... check a vac line diagram
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Old Jun 11, 2011 | 11:52 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

because my car has the wiring for a one silonoid and this has two so i just kinda wanna get rid of it
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Old Jun 11, 2011 | 11:55 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

i can add pictures of the lines can someone please post a pic of their lines??
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Old Jun 11, 2011 | 12:42 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

does this help?

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Old Jun 11, 2011 | 12:42 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

lol now that i see the pic prob not
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Old Jun 11, 2011 | 12:43 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

are you running the canister that came on the car or a diff one cuz mine has lines running to it that go to a thing that is stamped pm5 cuz thats my old ecu code
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Old Jun 11, 2011 | 12:46 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

maybe this
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Old Jun 11, 2011 | 05:30 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

this is the way its setup now
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Old Jun 11, 2011 | 08:12 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

hey do you still have the stock engine from that car?

from what I can see it all seams to be hooked up correctly
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Old Jun 11, 2011 | 09:13 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

Thats what I'm tryin to say I just dont get it but when I rev up at 4500 rpm it stutters just for a sec then it's like it takes off in a second power band and it's the right ecu but no I do not have the stock engine I bought the car two months ago... Wire tuck the guy I bought the car from was a total ****ing moron and I shouldn't have bought it but.... Where does the bottem of the canister go and can I delete it and did you see the cut off valve setup in the plug? I just don't know maybe timing?
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Old Jun 12, 2011 | 08:15 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

wow that vacuum set up is hideous!

here's a factory integra vacuum diagram...

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Old Jun 12, 2011 | 09:37 AM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

agreed but everything is going to the right place and the little vaccumm thing for the throddle how the fu** is that suppossed to work? nd why does it start so fkn hard cold?
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Old Jun 13, 2011 | 12:23 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

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Old Jun 16, 2011 | 05:03 PM
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Default Re: 1990 crx hf with built b18a1 msd ign. Really hard start surging idle

I got the surgeonfish idle problem worked out but I still cannot figure out why it starts so unbelievably hard and runs with a really hard miss until it warms up a little bit... Anyone I need help!!!!
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