Code 9 after turbo install...wtf??
 

i just got done installing my homemade kit on my '89 CRX. get it running and adjust the fuel tables a bit at idle, roll out of the shop, and as soon as i start rolling i get a CEL. check it, 9 blinks. why would this happen all of a sudden after the install? i believe code 9 is the CYP sensor. the only thing that got unplugged during the install was the o2 sensor, but that is because i am running a PLX wideband. i am runnin the o2 turned off in TurboEdit so the ecu doesnt make any changes to my map. could that be why im throwing a code? like i said, the ONLY thing that was unplugged during install was the o2...

Setup:
'90 a6 motor/trans
hf mani
te04h turbo
volvo fmic
2.25" charge pipes
dsm 450s
TurboEdit chipped pm6

Re: Code 9 after turbo install...wtf?? (ryan89crx)
 

this help?

https://honda-tech.com/zerothread?id=688482

doesnt really help. the dizzy is pretty new, maybe a year old, maybe. and it just started happening after putting the kit on. seems like too much of a coincidence to me

Re: (ryan89crx)
 

Make it obd1 https://honda-tech.com/forums/images...s/emsmilep.gif I had this same problem with a B16 swap i did into a 88 std hatchback. We replaced the dizzy and it didnt help. Tryed everything. Finally the guy converted to obd1 and it went away. Ran fine every since.

Re: (G"UNIT)
 

i've had the same issue with 2 5th gen preludes that use the jumper harness to run hondata. They instantly get code 9. One has a brand new distributor, which didn't throw any codes before switching over to obd1 and hondata. I often wonder if its some strange wiring issue or a screw up in the software.

what actually causes this code? what does code 9 mean?

Re: (ryan89crx)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ryan89crx &raquo;</TD></TR><TR><TD CLASS="quote">what actually causes this code? what does code 9 mean?</TD></TR></TABLE>
is the CYL sensor
tells the ecu when the #1 cylinder is on TDC for the base for the sequential fuel injection
its most used for starting the engine, not while it runs

Re: (USDM 4G VTEC)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">is the CYL sensor
tells the ecu when the #1 cylinder is on TDC for the base for the sequential fuel injection
its most used for starting the engine, not while it runs</TD></TR></TABLE>hmm...thats wierd. my car starts up 10x better with the 450s and TE than it did stock, lol

Re: (ryan89crx)
 

Man, I am having issues with this code too! I'm an obd1 car with an h22a1 engine. It happened all of sudden when I het a bump and I threw a cel. I ended up having 3 codes, but two were because of loose wiring on my oxygen sensor. I ended up with the code 9 and I haven't been able to get rid of it. I've since left for korea and my car has been sitting for over a year. I'll have to try and remedy it when I get home!

Before I left, I also replaced the dizzy and that didn't help at all. Someone suggested that it may be the wiring and I didn't get a chance to test it with a voltmeter so I'll do that when I get back too. Funny part is that my car was running and boosting fine with no problems https://honda-tech.com/forums/images...s/emsmilep.gif Only thing was that damn Cel wouldn't go away!!!