Hey everyone, weird issue. Randomly, my Lambda and A/F drop to .75 and 10.7

The video shows. Ideas?

 

Cat protection ?

 

I'm running a ZZP Catless DP. So probably not? Lol

 

does it run like crap?
since your supposed to be burning at stoich, youd get the rich cel and trims would be crazy negative, unless the interceptor is just off.
next time you log and see this, take a look at ltft and stft as well

we can rule cot out because will run only in pe. and its a setting in the ecu. so you still have it as long as your tuner didnt zero it out.

 

It runs great, but my fuel trims are weird. Ill get exact numbers when I get back in it.

 

It's probably that You are in PE Mode. My car does the same thing and I am on catted dp, You should be fine as long tuner knows what he is doing.

 

What's PE? Matt at ZZP tuned me and he knows what's up.
Started my car and Long Trims at -8.5 and short trim fluctuates from 3.5 to -3.5 but stays mostly at -0.7

 

Power Enrichment Mode, it just richen up your AFR. It give your car more horsepower that give you the power. If ZZP tuned you then you should be fine, it's safe.

 

I figured it'd be no big deal. I've been in contact with Matt; I have to go over to them anyway for a retune when I pick up the 3 bar MAP, so it should be taken care of then.

Thanks guys. I appreciate it

 

that isnt normal. you arent supposed to go into power enrichment while cruising. thats the point of pe. it puts you at a safe afr during increased throttle periods. you burn at stoich at all other times, i.e cruise/idle. its not a tuning issue either. unless it always did that. i dont think zzp would be setting up pe to come in at such a low map though. and .75 lambda is way lower than what the majority of lnf guys run at wot. its more like .88

its either an interceptor problem, an 02 problem, an ecu problem or some mechanical issue.

do you have a check engine light?

 

It's weird because it only stays down that low for about 10 seconds total, and it's COMPLETELY random when it does it. I haven't seen any correlation. I've seen it do it cruising at 70, and 55 twice, and once while idling.
No CEL. Like I said, I'm heading to ZZP soon so we will see there. I've never changed the O2 on the manifold, but I have changed the downstream one.

 

Just googled it. Isn't Gremlin85 a member here?

LNF Commanding Weird Lambda???

 

i believe the manifold o2 is the one that gives the wideband reading for the lnf. but hey, if you are already headed to zzp, they should be able to figure it out for you

 

I believe you are correct on that one. It never clicked in my head that it could be an O2 issue. I'll check the O2 sensor out tomorrow.

 

good luck then. too bad the guy on hpt never said what fixes it lol

 

I'm PM'ing him right now on here, cuz he is a member.

Thanks man! I appreciate it