Speed density tune or not...
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From: Roseville, CA
I don't know. If they fail you for failed codes, then I guess it's possible. Is the MAF considered an emissions thing in NY? It's just for airflow readings. Once you tune the car's VE table, it reads from the table based on MAP and RPM vs the MAF. So the fueling isn't going to be way out of line... If it was you'd burn up a piston or wash down the rings.
This is one reason I like Florida. I could drive a back-halved car on the street and they wouldn't care. They'd pull me over to talk to me about it.
This is one reason I like Florida. I could drive a back-halved car on the street and they wouldn't care. They'd pull me over to talk to me about it.
Thread Starter
11 Second Club
iTrader: (2)
Joined: Jun 2014
Posts: 2,087
Likes: 3
From: Roseville, CA
I don't know. If they fail you for failed codes, then I guess it's possible. Is the MAF considered an emissions thing in NY? It's just for airflow readings. Once you tune the car's VE table, it reads from the table based on MAP and RPM vs the MAF. So the fueling isn't going to be way out of line... If it was you'd burn up a piston or wash down the rings.
This is one reason I like Florida. I could drive a back-halved car on the street and they wouldn't care. They'd pull me over to talk to me about it.
This is one reason I like Florida. I could drive a back-halved car on the street and they wouldn't care. They'd pull me over to talk to me about it.
Thanks for all the feedback guys
You can fail the MAF setting the fail mode to "FAIL ON FIRST ERROR" and uncheck the "SES ENABLE" box. I have done it many times and it works. Doing it this way the PCM sets the MAF code and reverts to SD mode, but will not report the DTC to a scan tool. The DTC is active just not visible to a scanner.
If you set the fail mode to "NO ERROR REPORTED" it will not fail the maf and will never revert to SD. This is different
I don't know how this affects the readiness monitors or if you can pass emissions.
This
If you set the fail mode to "NO ERROR REPORTED" it will not fail the maf and will never revert to SD. This is different
I don't know how this affects the readiness monitors or if you can pass emissions.
This
You can fail the MAF setting the fail mode to "FAIL ON FIRST ERROR" and uncheck the "SES ENABLE" box. I have done it many times and it works. Doing it this way the PCM sets the MAF code and reverts to SD mode, but will not report the DTC to a scan tool. The DTC is active just not visible to a scanner.
If you set the fail mode to "NO ERROR REPORTED" it will not fail the maf and will never revert to SD. This is different
I don't know how this affects the readiness monitors or if you can pass emissions.
If you set the fail mode to "NO ERROR REPORTED" it will not fail the maf and will never revert to SD. This is different
I don't know how this affects the readiness monitors or if you can pass emissions.
Russ Kemp
For SD to work, you must set DTCs for P0101/102/103 to 0 - MIL on First Error or 2 - No MIL light. 1 - MIL on Second Error can cause problems. 3 - No Error Reported won't fail the MAF and force SD. SES Enable can be checked or not, doesn't matter.
1-MIL is how I had mine. It sometimes takes a moment to start with that. I'd recommend 0 or 2. The preferred method is actually setting to 2-No MIL light. I don't know if a scan of the DTCs will read an error if 2 is selected?
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Verdad Gallardo I have found setting MAF codes to MIL on first error makes for easier starts after a battery disconnect. No Mil Light sometimes takes a few tries to start the engine. However, once the MAF code is set it will start without issue until the battery is unplugged or the PCM is flashed.
Ok, it just doesn't matter if you set the Maf DTC to mil on 1st error, 2nd error or no mil light. As that will still set the Maf DTC and will default to speed density. Changing when the Mil light comes on or not is just that, nothing to do when the code sets.
And to be in SD, there has to be a Maf code, doesn't matter if the Mil light is on or off.
Russ Kemp
And to be in SD, there has to be a Maf code, doesn't matter if the Mil light is on or off.
Russ Kemp
I believe if you go to the DTC screen in hp tuners while it's running, it will tell you if the readiness monitors are happy.
You can also try a normal scan tool that shows the monitors condition.
I believe inspection simply looks for the check engine light, and checks the monitors.
Unless they are getting smarter, they wouldn't know what the DTC means. There are certainly DTC's the PCM sets but don't illuminate the CEL in the factory tune.
If you have visual inspection, leave the MAF in. Worried about a flow restriction, gut it.
Ron
You can also try a normal scan tool that shows the monitors condition.
I believe inspection simply looks for the check engine light, and checks the monitors.
Unless they are getting smarter, they wouldn't know what the DTC means. There are certainly DTC's the PCM sets but don't illuminate the CEL in the factory tune.
If you have visual inspection, leave the MAF in. Worried about a flow restriction, gut it.
Ron
Thread Starter
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From: Roseville, CA
I'll see if I can call the shop that does my inspection today. They don't pop the hood or look under the car. Just plug and go lol.
What I do know is that if the car does fail the information goes directly to NYS and you have so many days to get it fixed. No way around it. The computer is tied directly into their systems.
What I do know is that if the car does fail the information goes directly to NYS and you have so many days to get it fixed. No way around it. The computer is tied directly into their systems.
Last edited by scotty2000ss; Oct 24, 2014 at 05:29 AM.
If the CEL isn't illuminated, you're going to be fine.
If I was you, personally, get it inspected NOW, then have your tuber simply take the literal 5 seconds to swap it to SD, and be on your merry way.
Once the tune is dialed in, it's dialed in. The tune itself doesn't change going MAF or SD, or back again.
If I was you, personally, get it inspected NOW, then have your tuber simply take the literal 5 seconds to swap it to SD, and be on your merry way.
Once the tune is dialed in, it's dialed in. The tune itself doesn't change going MAF or SD, or back again.
if you correctly set it up for speed density you wont have any dtc codes. belive it or not in 93 the z28 Camaro was speed density from the factory. speed density is nothing new. car will operate just fine and emissions wont change.
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Joined: Apr 2002
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From: So.Cal.
How do you correctly set it up for speed density...?