Engine Misfire FBO Coyote

[XeninWorX]

yeah im very unsure, i’ve gotten 5 revisions since i started getting this issue to ensure it wasn’t a tuning problem. i have strong confidence in the tuner, very credible. currently has the 2nd fastest N/A coyote f150 in the world, mechanical engineering degree and no one i know has had any issues with his tuning. my last resort is to take it to a local coyote performance shop so they can tear it apart and figure out if there’s anything wrong. i recently pulled out a spark plug to inspect and noticed there was oil around the thread. unsure if this is related to my misfire

At this point who knows. If you trust the tuner then maybe it’s the fuel.

figuring out car problems is a pain. One time I had a noise coming from the back of my car when I’d drive for a while. Inspected everything and it all looked fine. Then I looked at the rear brakes and thought to myself “are the wear indicators on the brake pads rubbing on the caliper?. So I cut off the inicators and never heard the noise again.

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[Jhamp232]

Trying to bring this back from the ded. Updated my cal and so far the car has been running great, though it’s only been a day. I’ll log a few commutes this week and if I can confirm the misfire at low load is gone, I can post what switch/table modifications got me to this point.

 

[Cory S]

If it comes back, you may need to close up your plug gap a bit.

 

[Wilownu]

Trying to bring this back from the ded. Updated my cal and so far the car has been running great, though it’s only been a day. I’ll log a few commutes this week and if I can confirm the misfire at low load is gone, I can post what switch/table modifications got me to this point.

Did you get it fixed? I'm having the same issues.

 

[Jhamp232]

Switching off the mapped points from 14-25 in the 38155 config table keeps the cal from running on mapped points that require IMRCs to still be functional.

 

[Scoot61]

just wondering if things are still running with your last post on imrc?
my tuner has said he has done this but i am still getting random misfire below 3000 rpm runs perfect above that

 

[Baldilox]

just wondering if things are still running with your last post on imrc?
my tuner has said he has done this but i am still getting random misfire below 3000 rpm runs perfect above that

Scoot, did you get yours resolved? I’m being tuned with Lund and am having random misfires from idle up to about 2200 rpm or so as well

 

[Scoot61]

Kinda I've gone with PBD ,first tune made a big difference how the car ran at lower rpm
Still have a very slight sounding misfire from 2250 to 2750 but nit getting any cels, doesn't cause any issue as to how runs waiting for another tune and do some data logs today

 

[Baldilox]

Kinda I've gone with PBD ,first tune made a big difference how the car ran at lower rpm
Still have a very slight sounding misfire from 2250 to 2750 but nit getting any cels, doesn't cause any issue as to how runs waiting for another tune and do some data logs today

Do you have your IMRCs locked or no?

 

[Scoot61]

Mine are locked out

 

[cterie]

Has anyone found a fix for this issue? 2017 Mustang gt with gen3 IM. Getting p300 as well. Multiple misfires when around 1600-2400 rpm. Going monday to get the imrc deleted, locked out and then tuned but I'm worried this won't fix the issues. Would appreciate any feedback or solutions.

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