Installed Manifold - Help!

[cgiles]

I'll prefix this with I'm a moron when it comes to cars. I know enough to be extremely dangerous but I like to tinker and I know the only way to learn is to make mistakes. I've made a mistake somewhere and my lack of knowledge and experience is showing.

My car is a 2016 GT that I recently installed a catback on. That worked fine, drove fine, went to Mustang week and back, no issues. I get back home and install a ported 18 manifold, 47# injectors, PMAS, a tune, and fill up with e85. I watched the VMP video and I think I had it all correct. After loading the tune the car runs like crap. I datalogged and sent to tuner and apparently my O2s never come on.

I'm running at 9.8:1 afr all the time, if I'm to believe the dash numbers. I kept the IMRCs and have been over all the vacuum hoses. I watched the Auto Mafia Racing video and that's how I have it routed now with the IMRCs still intact. Still runs the same. I thought O2s would come to life at a certain temperature. Why wouldn't they work? They are six years old but I can't imagine they both went bad on the first crank with e85. I checked fuse 40, which seemed to be a problem from my searching, and it's not blown.

What else can it be? Tuner wants me to lock out the IMRCs, but I don't think that will miraculously make my O2s work.


Edit: I had P2196 and P2198 codes. I cleared and they never came back.

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[Proshop]

Do what your tuner asked and lock them out! I could be wrong but I don’t believe the 18+ electronics for the IMRC are the same so that maybe your issue.

 

[cgiles]

I used the Lethal pigtails to make them work.

 

[K4fxd]

Flash it back to stock then back to the PMAS tune.

 

[WildHorse]

Flash it back to stock then back to the PMAS tune.

Advice of the year right here

 

[silverbullet85]

Did you wait to fill up on e85 till you were as empty as possible? I ran mine on pump gas tune and as soon as the car started to run poorly I switched to the e85 tune and everything's good. I would try reloading tune like was suggested and go from there.

 

[EFI]

apparently my O2s never come on.

I'm running at 9.8:1 afr all the time, if I'm to believe the dash numbers

How can there be an AFR reading in the dash if the sensors don't come on??

Who tuned the car? I would say it's between a very poor tune (which I doubt if you used a good vendor) or you have a major vacuum leak. Have you checked all intake and manifold connections are good? Do you have any other codes besides the ones you cleared and never came back again?

 

[K4fxd]

How can there be an AFR reading in the dash if the sensors don't come on??

It's in open loop. I've had this happen to me before when battery voltage got low during a flash. Charge the battery and flash to stock, then to the E85 tune.

 

[cgiles]

Flash it back to stock then back to the PMAS tune.

I would need a tune. I only have a stock tune, e85 w imrc, e85 wo imrc.

 

[Jackson1320]

reflash the tune and make sure the battery is fully charged before you do it

 

[cgiles]

what is the procedure for applying the stock tune and then reloading e85? Leave car off or crank it after going back stock tune?

 

[Proshop]

what is the procedure for applying the stock tune and then reloading e85? Leave car off or crank it after going back stock tune?

What tuning device are you using?

 

[cgiles]

What tuning device are you using?

Sorry,

That would be a handy bit of information. I have a X4.

 

[Proshop]

Sorry,

That would be a handy bit of information. I have a X4.

Been years since I’ve used an SCT device and on a different platform but doesn’t it save your factory tune before you use the aftermarket tune? If it does then flash the saved factory tune from the SCT back on to the car and then reflash your e85 tune. As for your AFR they are correct for e85 that’s what mine read at idle also.

 

[cgiles]

I returned to stock tune and then reflashed the e85. It feels much better driving and the AFR now moves instead of being a static 9.8. I've logged and will send to the tuner to see what they think. Fingers crossed.

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