So I got this unichip for my rx8, had it custom mapped for free, (because I'm sneaky like that), but my check engine light comes on. I haven't put the apexi exhaust on yet, so maybe that's the problem, I don't know. Does anyone know if it's maybe because of the fuel sensor or mass airflow sensor or anything? Oh, and does anyone have the apexi hybrid exhaust (the one with the valve that opens and closes)? If anyone has any info on that, please hit me back. I appreciate it.

 

Go check the error code, and you'll know what's wrong......how should we be able to guess, based on your description ?

 

dream on if you think you'll beat mustangs with your 8. welcome.

 

Dreams don't often come true, but they have for me

 

That's nice to hear Bastage.

 

at least we have a chance against 6 cylinder stangs..

 

you apparently have no idea whats under bastage's hood

 

lol.. i see his sig.. talking about the rest of us who arent rolling with that extra hp..

 

are you kidding? 6 cyl stangs are jokes. They weight over 3700lbs with driver and have the same rwhp as a 6-speed RX-8. Either you don't know how drive for that V6er was a V8

 

welcome to down under two years ago..

good job.

beers

 

I don't know, that's why I asked.

 

Mustangs will take an 8 off the line no question, but the 8 catches up in no time. I know this, because I constantly outrun my friends cobra. That's right. So, unless I've had the same dream for a couple years, I'm right, you're wrong. Welcome

Anyway, to get back on topic, can anyone else answer my question?

 

The previous gen 6 cylinder Mustangs (3.8L V6) was able to crack into the high 14s with a very good driver and 5MT and was a solid low 15s car otherwise. C&D got one of the new ones (4.0L V6 automatic, which only weighs 3300lbs according to Edmunds) to run a 15.3, so I'd bet that a well drive 5MT could break the 15.0 second barrier. So, long story short, it's pretty much a driver's race between one of these Mustangs and a 6MT RX8 unless you're really good at launching at a high RPM.

 

The exhaust won't be the issue either way. Most all aftermarket PCM upgrades are causing CELs.

Pettit experimented with Unichip, but never really had much to say regarding them...don't recall any members writing much either...maybe do a search under "Unichip"

 

you can outrun a cobra? im not the best rx8 driver out there but im pretty sure that it doesnt matter how good of a driver you are, the rx8 cannot beat cobras unless the cobra sucks (old ones). we cant even beat the '06 mustangs with v8's in them and the cobras are even better than that. and you are NA so im throwing the BS flag.

 

Maybe by 'cobra' he means an actual Snake? A reptile. His friend may own a reptile - and they stage races between the cobra and the rx8.

 

hahaha yea thats the only way an NA rx8 can beat a "cobra"

 

Hey if he says we can then it's true, I'm going to pick a race with every stang I see

 

The early 90s Cobras only ran mid 14s when they were new, so an RX8 would definitely have a chance against one of those. Remember, a lot comes down to the driver and the general condition of the car, especially if it is an older model.

 

But he wrote:

Constantly. Not occasionally. Occasionally 'could' be plausible - if it was one of the old-skewl Cobras or an actual reptile.

By the use of the word constantly he is actually saying right NOW he's outrunning his friend's Cobra. I think he meant 'consistently', fwiw...which is still :bs: of course, unless, as I stated, it's a way old skewl cobra ('member the Mustang II cobras?), or the reptile.

 

I would go down to autozone and ask to borrow a code scanner from them to pull the code. Make sure it is a CAN compliant scanner. Regular OBD-II scanners don't work.

Then search under "CEL codes" once you have the code number and look up the discription. Once you have that search under the code number on the forum and you'll get some threads that will help figure out what to do.

Let us know what code you get!

 

all i want to know is what year is the cobra and does he have any mods?

 

Reset your ECU by unplugging the battery.

 

[QUOTE=Pony Killer 79;1935823]Mustangs will take an 8 off the line no question, but the 8 catches up in no time. I know this, because I constantly outrun my friends cobra. That's right. So, unless I've had the same dream for a couple years, I'm right, you're wrong. /QUOTE]



Welcome, noob. i look forward to flaming you in the future.

 

Most of the signal manipulation from the unichip will come from intercepting the MAF signal. Obviously the OEM ecu has a certain window of signal that it finds acceptable under given inputs from the other sensors on the engine.

Of course the true first step is to read the code, but for a quick poke at it, disconnect the battery for 1/2 hr or so, and let the ecu "relearn" the settings everything is at as normal. This may or may not fix it, but it is a start if you dont have access to any scanners. It may just take longer to come back, but it may fix it altogether.

The exhaust shouldn't really cause any issue other than slightly leaning out the afr, but the oem o2s aren't super accurate anyways so it's doubtful that will change anything.

If it turns out to be the maf intercept signal causing the problem, you can just have it remapped a tiny bit less aggressive, that should fix it. The unichips are pretty easy to just back down one step across the board or in certain areas, so this shouldn't be a big deal at all.