Osiris reflash and emissions testing question
10-06-2010, 08:07 PM
#1
Osiris reflash and emissions testing question
Hey all you guys running Osiris tunes: do you routinely need to disable DTCs in order to prevent a CEL or does tuning the stock ECU preclude that. I have a Haltech and Osiris, but everytime it comes around time for emissions testing, I have to fiddle with the fueling to make the stock ECU happy long enough to pass OBD testing. I have been able to pass for the last 3 years, but each year it is a PITA. I've been thinking of tuning the low rpm/load sites using Osiris and use the copy through function of the Haltech for fueling (as I do for timing) BUT it's only worth the effort if it precludes the O2 DTCs (too lean, too rich, blah, blah, blah, P0171, P0174, P1286, etc).
FYI, for emissions testing, I re-enable all DTCs. This helps set the SRTs for all tests to "Ready" as quickly as possible. O2 heater and catalyst will eventually go to "Ready" even with the O2 DTCs disabled, but the O2 and EVAP won't ever go to ready unless you enable all DTCs. In NC, you can only have one test "Not Ready" and still pass. For me this is usually EVAP, which takes the longest to set.
FYI, for emissions testing, I re-enable all DTCs. This helps set the SRTs for all tests to "Ready" as quickly as possible. O2 heater and catalyst will eventually go to "Ready" even with the O2 DTCs disabled, but the O2 and EVAP won't ever go to ready unless you enable all DTCs. In NC, you can only have one test "Not Ready" and still pass. For me this is usually EVAP, which takes the longest to set.
Last edited by rcdash; 10-06-2010 at 08:11 PM.
10-07-2010, 11:32 AM
#2
I hadn't gotten a single code in several months since retuning with Osiris. it does take some very fine tuning to ward off the occasional P0420 though, but you can do it.
Even with UTEC I only got ETC related codes over the past 2 years (the reason I got rid of it LOL), but never any O2/emission codes.
As long as your Haltec doesn't get in the way, I don't see an issue with letting Osiris run the car out of boost...I just wonder if you'll have some transitional issues like UTEC.
Even with UTEC I only got ETC related codes over the past 2 years (the reason I got rid of it LOL), but never any O2/emission codes.
As long as your Haltec doesn't get in the way, I don't see an issue with letting Osiris run the car out of boost...I just wonder if you'll have some transitional issues like UTEC.
Last edited by djamps; 10-07-2010 at 11:38 AM.
10-08-2010, 07:06 PM
#3
The Haltech copy through function is pretty cool. Quick question - is there a way to see the final injector pulse width that the stock ECU is putting out using RTT via the ROM editor? If so, I can tune the stock ECU to match the Haltech's output before actually putting the stock ECU in control.
I came close today - the stock ECU reported "all ready" for emissions testing on the way to work, but later in the day a P1167 and P1268 popped up. If I had the morning free, I would've driven right to the testing station. Reset and trying one more time before giving tuning a shot. I've got Haltech's AFR dialed in but now need to fiddle with decel cut (that's what the P1167 represents - 2nd O2 sensor testing during decel).
I came close today - the stock ECU reported "all ready" for emissions testing on the way to work, but later in the day a P1167 and P1268 popped up. If I had the morning free, I would've driven right to the testing station. Reset and trying one more time before giving tuning a shot. I've got Haltech's AFR dialed in but now need to fiddle with decel cut (that's what the P1167 represents - 2nd O2 sensor testing during decel).
Last edited by rcdash; 10-08-2010 at 07:08 PM.
10-09-2010, 04:18 AM
#4
Fairly certain you can log IPW, not during RTT but using performance logging. check your Cipher to be sure -- I don't have my cable handy so I can't check myself. In the manual it gives you the equation used to calculate IPW so you can make adjustment to hit your target in many places with similar effect. That said, tuning with Cipher/ROM editor is always a balancing act. Fixing one thing usually breaks another, LOL.
Last edited by djamps; 10-09-2010 at 04:21 AM.
10-09-2010, 07:52 PM
#5
Not being able to see IPW in RTT is harsh. I need to have Cipher open at the same time as the RTT but this isn't allowed. The ROM editor now has live tuning but I don't know how that works. RTT in Cipher works, but I have to keep going back and forth between RTT and Cipher to see what the impact of a single change was. How painful...
11-07-2011, 07:28 AM
#7
P0420/P0430 is the cat SRT DTC codes.
Disable the P0171 and O2 probably will not go ready but that's ok in NC. If the outside air temp falls below 68 deg F (as it is these days), you must drive 17 mins and then drive 3 mins at 56 mph with the pedal perfectly still in order to get the CAT to go ready.
The problem with using the ProEFI for control is that the wideband sensors are not exactly calibrated the same. I have been able to get the O2 to go ready in the past without a DTC by calibrating the O2 widebands in the Haltech to match what Cipher was displaying. Took a lot of trial and error.
Disable the P0171 and O2 probably will not go ready but that's ok in NC. If the outside air temp falls below 68 deg F (as it is these days), you must drive 17 mins and then drive 3 mins at 56 mph with the pedal perfectly still in order to get the CAT to go ready.
The problem with using the ProEFI for control is that the wideband sensors are not exactly calibrated the same. I have been able to get the O2 to go ready in the past without a DTC by calibrating the O2 widebands in the Haltech to match what Cipher was displaying. Took a lot of trial and error.
Last edited by rcdash; 11-07-2011 at 07:30 AM.
Trending Topics
11-07-2011, 10:01 AM
#8
I am not sure why I am even getting the P0171 code at all. Unless that sensor was starting to go bad. I have normal AFRs with my widebands so that should be well within the normal reading on the OEM narrowbands.
I usually get it as a pending code, but actually had it trip the CEL light the other night when I romped on a on ramp pull.
I usually get it as a pending code, but actually had it trip the CEL light the other night when I romped on a on ramp pull.
Last edited by str8dum1; 11-07-2011 at 10:03 AM.
Thread
Thread Starter
Forum
Replies
Last Post
Tochigi_236
Feedback & Suggestions for Our Forum
8
09-27-2015 03:40 PM
