1hotroc

Hi like the topic says . Put octane booster in last night in hopes for a little booster for test and tune. It went the other way it went slower and afr was 9.5-10.0 at wot. I had nothing like this before most afr was 12.5-13.0 previously and .3 faster in 1/4. I installed the Lucas crap that treats 25 gallons and used like 3/4 of the bottle on only 1/2 tank which I know is wrong. Going to try and burn this tank full out and refill with 93. Part throttle and cruise afrs are still spot on it’s only wot that’s crap. Anybody have this happen using octane booster?

G Atsma

Octane booster should not in itself affect A/F ratio.

1hotroc

Thanks. It must be something else then. Going to try and clean the mass air sensor too. Something went out of whack. Only at wot though it’s pig rich. Weird

Old Buzzard

While U R looking take a look at the deposits on the plugs and O2 sensors....

1hotroc

Yes I’ve already changed out the plugs and they were not looking good. Had a reddish tint on porcelain area almost like rust . I believe it has also taken out my wideband o2 sensor . Making me believe it’s running pig rich when it really isn’t . I ordered another sensor. Should be good after that. Will report back. NEVER AGAIN will I put octane booster in my car!!!!

rpturbo

iTrader: (47)

Did you make sure that specific booster, said it was O2 safe? I mean, the stuff isn't going to really bump octane up probably more than a point or 2 anyway. Unless you were changing plugs and tuning it to get every single HP out of it, it wasn't going to matter anyway.
My point is, we all do some things at times that aren't great ideas, and we learn from them.
Your O2's may have not been great anyway, and well, just consider this maintenance. Buy good O2's, not the cheap aftermarket crap, that will just cause more headaches.
The color on your plugs is from the additives.

Edit, after rereading this, if it's only at WOT, then none of that makes sense because the O2's do nothing to correct fueling at that point. It's strictly running on the VE table.

Tommy42088

I run boostane in my truck and it loves it, definitely don't see afr changes like that

1hotroc

Update: I changed plugs and installed new wideband o2 sensor . At Wot it’s still rich but is not reading as rich. Was 9.5 pigged out now 11.0- 11.5 . Still obviously a rich condition . I Ordered all new GM upstream and downstream o2 sensors . The octane boost obviously messed up my wideband, thinking it also did the same to the other o2’s. I’m praying this takes care of it and I’m back to running properly at wot 🤞

RonSSNova

iTrader: (3)

That stuff coats the plugs, combustion chambers, valves, pistons and sensors with orange crap. I learned that 20 plus years ago when trying Moroso octane boost. The stuff today is no different.

How do you read a plug covered with that?

I simply won’t use it.

1hotroc

Quick update: So what I thought was octane booster causing my rich condition and ruining my o2 sensors was not the case. I feel a little bad trashing lucas octane booster but I still wont use that stuff. After a week of sleepless nights trying to figure out my problem I smoke tested the intake and found the SLP air lid was not sealing properly! I believe this condition was causing too much airflow that the mass air was sensing especially at WOT causing to increase injector pulsewidth in turn causing AFR TO GO INTO 11.0-11.5 RANGE. Once I replaced foam seal on lid and secured properly I took car for roadtest and verified my AFR at wot was back to 12.7-13.0 range as before and crispness was back again. Anyway I now have fresh plugs, new wideband O2, new GM upstream o2s and a new oem GM PCV hose setup. That sucked but I'm happy again.

mk3cn4

iTrader: (3)

Octane is not a measurement of power but a measurement of resistance to detonation. AFR is never changed with more/less octane from what I uderstand.

Havent looked in a few years but it used to be the Octane booster that claimed many full "points" of boost are really still way less than 1 actual octane improvement.

Tommy42088

I did notice a difference with boostane, but I did use a pretty good amount.

Dian

i have been using booster for many years when tuning/retuning. i believe it saved me a couple of times after making stupid mistakes out of negligence. the red "stuff" you have to put up with. never killed the wideband or cat after treating a tank full once in while. lately i have been using torco.

what some vendors call "points" are in fact 0.1 octane fractions. learned that many years ago.