[Joshinator99]

Originally Posted by SJFGTO

You read waaay more into my post than I said. It is any easy permanent fix by any competent shop, not the code, the issue causing the code.

Also not true. High flow cats will not satisfy the secondary O2 criteria on newer cars. A “competent shop” cannot magically make aftermarket cats satisfy the ECM. They have different cel counts vs stock cats and even though you are reinstalling cats, you’ll still trigger the CEL. And you cannot technically eliminate the permanent codes unless you put the stock cats back in to satisfy the ECM. Can you band-aid the situation as per my post above, sure. But the permanent fix to permanent codes is to address the tune before altering your exhaust to begin with.

[SJFGTO]

Originally Posted by Joshinator99

Also not true. High flow cats will not satisfy the secondary O2 criteria on newer cars. A “competent shop” cannot magically make aftermarket cats satisfy the ECM. They have different cel counts vs stock cats and even though you are reinstalling cats, you’ll still trigger the CEL. And you cannot technically eliminate the permanent codes unless you put the stock cats back in to satisfy the ECM. Can you band-aid the situation as per my post above, sure. But the permanent fix to permanent codes is to address the tune before altering your exhaust to begin with.

His mods are very simple. The CLE is not the norm. The tuner failed to address the cause of the CLE in the tune after the exhaust mods were added. Take it back to the tuner and fix the tune. Done.

[s346k]

Originally Posted by SJFGTO

His mods are very simple. The CLE is not the norm. The tuner failed to address the cause of the CLE in the tune after the exhaust mods were added. Take it back to the tuner and fix the tune. Done.

do you realize it will still have permanent codes? the cel will be gone but when someone scans that ecu 2 permanent codes will be shown. all that's getting "fixed" is the cel itself.

if the car went in (stock) without any codes id be pissed. i drove mine around for a few days before it got tuned, the perm codes in that instance are my fault.

[Joshinator99]

Originally Posted by SJFGTO

His mods are very simple. The CLE is not the norm. The tuner failed to address the cause of the CLE in the tune after the exhaust mods were added. Take it back to the tuner and fix the tune. Done.

I’m guessing you don’t know how permanent codes work...?

Originally Posted by s346k

do you realize it will still have permanent codes? the cel will be gone but when someone scans that ecu 2 permanent codes will be shown. all that's getting "fixed" is the cel itself.

if the car went in (stock) without any codes id be pissed. i drove mine around for a few days before it got tuned, the perm codes in that instance are my fault.

[MVPxD]

So i went to the shop and the CEL is gone. The guy sat in the car with his computer for about 10 mins and got it done. Not sure what he did, but he said the light won’t come on anymore. The car is new so I don’t need to worry about an inspection til 2025, so I guess I’ll deal with that then if it is a permanent code.

Also, I guess now the main concern is still the numbers. Their dyno showed 379 stock. And 427 with all the noted mods and on E85??

I know it’s a mustang dyno but I honestly expected more than 427 without the E85 lol ... am I just overthinking this and getting hung up on numbers or should I dig more into it?

[NA18CamaroSS]

Hit a DynoJet. The bigger numbers might make you feel better. Have them use STD correction to get the highest possible numbers.

[MVPxD]

Originally Posted by NA18CamaroSS

Hit a DynoJet. The bigger numbers might make you feel better. Have them use STD correction to get the highest possible numbers.

It’s not about just getting higher numbers. I understand mustang dyno hit lower. But I did expect a bit more. My concern is more so with the tune, if there’s something on that end that’s causing lower numbers? Or if it’s just the dyno. Concern is the tune, not the numbers

[s346k]

the number itself isn't what to look at, imho. the gain from stock is whats important.

[SJFGTO]

Originally Posted by MVPxD

So i went to the shop and the CEL is gone. The guy sat in the car with his computer for about 10 mins and got it done. Not sure what he did, but he said the light won’t come on anymore. The car is new so I don’t need to worry about an inspection til 2025, so I guess I’ll deal with that then if it is a permanent code.

Also, I guess now the main concern is still the numbers. Their dyno showed 379 stock. And 427 with all the noted mods and on E85??

I know it’s a mustang dyno but I honestly expected more than 427 without the E85 lol ... am I just overthinking this and getting hung up on numbers or should I dig more into it?

Congrats on getting the CEL removed. Don’t worry about the dyno numbers. Dyno HP is the by product of how an engine performs. If your car is running strong, no worries. As noted, on a different day on a different dyno you’d see different numbers. Enjoy!

[wnta1ss]

Originally Posted by MVPxD

Also, I guess now the main concern is still the numbers. Their dyno showed 379 stock. And 427 with all the noted mods and on E85??

I know it’s a mustang dyno but I honestly expected more than 427 without the E85 lol ... am I just overthinking this and getting hung up on numbers or should I dig more into it?

Baseline and modded both tested on the same dyno (info you are giving) is indeed the correct way to use a dyno. Your mods as follows:

1-7/8 long tube headers
High flow cats
Race catback exhaust
Rotofab CAI
Ported 95mm throttle body
Ported LT2 intake manifold
160 thermostat
E85 tune

on an SS LT1 typically are reported as gaining more than yours did. 48rwhp gain does seem lower than expected for your mod list in other words. If you race the car then you could get some more info on how much quicker the car is now.

[Wobble Goat]

Originally Posted by MVPxD

So i went to the shop and the CEL is gone. The guy sat in the car with his computer for about 10 mins and got it done. Not sure what he did, but he said the light won’t come on anymore. The car is new so I don’t need to worry about an inspection til 2025, so I guess I’ll deal with that then if it is a permanent code.

Also, I guess now the main concern is still the numbers. Their dyno showed 379 stock. And 427 with all the noted mods and on E85??

I know it’s a mustang dyno but I honestly expected more than 427 without the E85 lol ... am I just overthinking this and getting hung up on numbers or should I dig more into it?

Dyno's are a tool for measuring. Don't get hung up on numbers. The only numbers that matter are ET and MPH at the track. If you are concerned about the tune, go to another tuner to have the tune double checked. And good luck with emission testing in 2025.

[Ventmaster]

O.P. (original thread poster) I'm, no expert on state by state CEL's and I'm sure someone will correct me if I'm wrong here- but it seems to me most places allow one or 2 "not ready" codes as long as everything else is "green" and good . Perhaps New Jersey is a hard-ass state for emissions, but I believe most states allow for one or two imperfect results if you don't have a glaring FAIL on any vital emissions reports.

Check your local requirements and ask around for any inspection stations that are not forwarding their computer read outs directly to the state (yet). Free movie passes you "don't have time to use" or even a bottle of Jack Daniels can be a good friend too (nudge, nudge- wink, wink).

Or move out west! Here in Utah, we did away with vehicle inspections all together and come May this year you can carry a concealed weapon without a permit or any instruction what so ever! Talk about about Land of the free and home of the brave... we're all about the pursuit of happiness around here.

[Unclejuju]

Interesting post, I’m getting the same issue, and got my mods done at the same shop