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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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06-20-2008, 12:39 PM | #1 |
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I got a NA chassis rx7 with a jdm turbo swapped motor. Should equal the same as a USDM turbo car, but i got an aftermarket intercooler, exhaust system intake yadda yadda.. If i throw some cats. would it be possible to smog the car? since its a motor swap not original for this model im curious about that.
Ive seen smog guys not worry about intakes since its just air filters. Possible for my car to pass visual on a motor swap since its basically the same as a turbo model?
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06-20-2008, 05:04 PM | #2 | |
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about the engine swap, if the technician doesnt notice that its the jdm motor, since the turbo motor was offered in that year, and all the emissions crap is on it (air injection and egr i believe, as well as cats) it should be fine. worse comes to worse, if he notices its the turbo'd engine, he sends you to a ref. |
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06-20-2008, 05:17 PM | #3 |
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techn9ne, you're the man. I'll try to get the S13 ref'd instead of just selling it/paying the fine.
So on my g/f's car, should I just reset the CEL and try to smog it first, before buying a new cat? Maybe the 100k mile cat can still pass? Most places are still "pass or you don't pay" right?
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06-21-2008, 10:26 AM | #4 | |
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06-21-2008, 10:38 AM | #5 |
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techn9ne
240 coupe 93 still throws code 32 egr after i changed egr valve,egr bpt,egr canister valve solenoid,egr metal tube,as well as changing all vac lines behind ka near fire wall. noticed that it will turn on during constant speed ie only on freeway where im in 5th gear 3500 rpms at 60mph or so then itll turn on..sometimes it will suddenly turn off but sometimes stays on til i reset ecu any ideas what it might be i passed slow speed with timing set @ 31 i know out of spec but failed high speed runnning rich could that be tha problem? |
06-21-2008, 11:20 AM | #6 |
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Dear Mr. Smog Tech,
My S13 failed NOx last week. Is it likely that it failed because of my 3" exhaust? I have heard that the lack of backpressure doesnt let the EGR operate properly. Any insight into this? |
06-21-2008, 12:36 PM | #8 |
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i have a ?. im putting my ka24de s14 back into my s14 its a 95. i want to know if i can pass smog with some header i have. i believe they are obdx headers they have the egr value connectors and so if i install before i drop it in will it pass smog, or would it be better to just put on the regular exhaust manifold and pass smog and then change it?
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06-22-2008, 06:10 PM | #9 | |
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if you get the guy that doesnt really care, as long as he sees that the headers have the egr valve connectiors and all the vacuum lines and shit are connected, he probably wont give you grief. i would just throw on the normal exhaust manifold just to be sure, since your already throwing a whole new engine into the KA, then just swap it later. |
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06-21-2008, 01:10 PM | #10 |
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When you plug into an OBD2 motor, does it give you information on what type of motor it is?
I'm just wondering if i swap for another obd2 motor and i get it running properly and not throwing codes if they'd even notice.
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06-22-2008, 06:19 PM | #11 |
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some obd 2 pcm's will tell you the VIN number of the car they originally came in. but the only thing the smog machine checks for is readiness monitor status and diagnostic trouble codes.
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06-23-2008, 12:37 AM | #12 |
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+a shit ton for this thread. Thanks a bunch man
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06-24-2008, 08:59 PM | #14 | |
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however, alotta smog techs are lazy as fuck, or if the smog joint is busy, they will not even bother to give the engine a second glance and will just pass everything on the visual. but generally, you'll have Mr. 'merican performance chevy 350 master, who generally doesnt know what and SR looks like. and if he doesnt bother looking at the engine because "its a goddamn piece of shit rice burner," and "all these 4 bangers are the same" |
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06-24-2008, 05:52 PM | #19 |
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Dear smog tech
i justa had a smog but failed heres the list of wat i failed........... fuel evaporative control funtional MIL/check engine light everything else is good. how can i fix that? i know its a leak but how would i go by finding it, i tracked it down to the rear end of the car but no luck finding it. HELP!! need smog ASAP |
06-24-2008, 09:05 PM | #20 | |
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i would check all the rubber hoses connecting from the gas tank up front to the charcoal canister, then the filler neck on your gas tank. the check engine light on a pre-obd2 car is an insta fail. so try pulling the code off the ecu and go from there. |
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06-25-2008, 01:13 AM | #21 |
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mr. smog tech, I think you should pull the info of where you work off this thread or other threads, and your location.
I would hate to see this thread get into the wrong hands. Never learned half this info from anywhere else. +1 for you. |
07-12-2008, 04:45 AM | #23 |
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from what i read earlier it said that if i remove the light bulb for the check engine light then my car can pass smog? im not getting it exactly cause im really looking for a place to smog my car non-legally but if thats all i have to do then let get that done. i know that the check engine light is part of the visual inspection part only so how else would it fail?
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07-12-2008, 10:06 AM | #24 | |
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07-26-2008, 04:54 PM | #25 |
Waddup? I have a 96 S14 that passed the emissions test but failed becuz the CEL wouldn't come on. The smog tech said that my ECU wasn't throwin any codes eithr so I though it was a burnt bulb. I then bought a bulb from Nissan and just swapped it out with the old one, and still no light. I unplugged the battery for a good several seconds and reconnected, but still no light. I also put the ECU in diagnostics mode and then had it reset, but still not light. Any ideas?
Also, some of the guys here wrote about rewiring it to the oil pressure light...can anyone tell me how u do that and which wires to rewire on the back of the instrument panel? I'll also be lookin it up in my manual in the meantime to try to figure it out. Thanks.
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07-26-2008, 05:45 PM | #26 |
NVM...for some reason...it's now working. I'm not sure if this may be why, but I stuck a wire from the the oil pressure wire to the CEL wire and then it came on, and stayed on after i removed the wire...maybe it just needed a jumpstart..haha.
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07-29-2008, 10:28 AM | #27 | |
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07-30-2008, 01:12 AM | #30 |
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My girls car...
91 S13. 95 KA-DE. New cat. Timing is perfect. Recently Seafoamed to clear the carbon deposits. New plugs, wires, cap and rotor. EGR works perfectly... Nox is STILL 6 times over the legal limit. Any ideas? |
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