CEL code 43 FUEL SUPPLY SYSTEM OBD0-OBD1 D16Z6 O2 sensor placement
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From: cincinnati, oh, united states
CEL code 43 FUEL SUPPLY SYSTEM OBD0-OBD1 D16Z6 O2 sensor placement
I keep getting an occasional code 43 when on the highway and driving near WOT, but NO performance loss is noticed. About the only difference besides the CEL is that when I come off throttle to idle, it idles between 1200 and 1250 RPM's, normally ~750 RPM's any other time. I've searched and half the people say to replace the O2 sensor if you get the code and don't see any drop in performance and half say that they did that with no luck. I also followed the Helms troubleshooting flowchart and came up with a conclusion of "intermittent failure, system is OK. check for poor connections at right shock tower, O2 sensor, and ECU". I have not had a chance to check my plugs to read them yet. Current plan is to rewire my O2 sensor and possibly move it.
Exactly where should I put my O2 sensor?
In the #4 runner, at the bottom of the header downpipe (might require some modification because it is right in line with my rear crossmember), or in the test pipe?
Does it matter where I put it, and why?
.:car, engine, and engine management:.
1990 Honda Civic SI
D16Z6 with intake, header, test pipe, exhaust and JG head w/ JG cam
newer (less than 1000 miles) universal 4-wire O2 sensor wired into Rywire OBD0-OBD1 conversion harness with crimp connectors and in-line plug
stock (unmodified except for auto-manual conversion) P28 ECU
.:things recently changed before code started showing up:.
replaced OBD0 injectors with freshly cleaned and balanced (by KGParts) OBD1 injectors, also rewired injector harness at left shock tower to remove resistor box
moved O2 sensor from test pipe location to bung on #4 runner of the header because my plugs looked like i was running a little rich and i wanted to put it above a small header leak that i have between the 2 parts (4-2-1 eBay special 2-piece header)
Now, the O2 sensor was the same one that I used for my car when it was boosted for a very brief time (about 150 miles), but it was just running on a street tune (assuming pretty rich).
Any ideas, tips, or solutions are appreciated. Please don't just say "replace the O2 sensor" without anything to back it up.
Exactly where should I put my O2 sensor?
In the #4 runner, at the bottom of the header downpipe (might require some modification because it is right in line with my rear crossmember), or in the test pipe?
Does it matter where I put it, and why?
.:car, engine, and engine management:.
1990 Honda Civic SI
D16Z6 with intake, header, test pipe, exhaust and JG head w/ JG cam
newer (less than 1000 miles) universal 4-wire O2 sensor wired into Rywire OBD0-OBD1 conversion harness with crimp connectors and in-line plug
stock (unmodified except for auto-manual conversion) P28 ECU
.:things recently changed before code started showing up:.
replaced OBD0 injectors with freshly cleaned and balanced (by KGParts) OBD1 injectors, also rewired injector harness at left shock tower to remove resistor box
moved O2 sensor from test pipe location to bung on #4 runner of the header because my plugs looked like i was running a little rich and i wanted to put it above a small header leak that i have between the 2 parts (4-2-1 eBay special 2-piece header)
Now, the O2 sensor was the same one that I used for my car when it was boosted for a very brief time (about 150 miles), but it was just running on a street tune (assuming pretty rich).
Any ideas, tips, or solutions are appreciated. Please don't just say "replace the O2 sensor" without anything to back it up.
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DelSolDon
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Jun 22, 2007 08:34 AM
