I was worried a little bit about water getting in it as well after doing the mod. However, a couple weeks ago I was driving in a torrential downpour. I was following my friend and couldn't see a massively deep puddle along the road next to the curb (about 6 inches deep) Anyways, I went right through it (with all four tires) at about 35mph and my car bogged way down cause it was so deep. When I was able to park my car I popped the hood and ran my finger around the hole where the air is drawn from, and not a drip of water. Plus, I think the only way you will get hydrolock is if you practically drown the car.

 

That's EXCELLENT news! I didn't think it would be a problem, but I did have just a slight concern, being that its tough to plan for every variable with other peoples' driving. I'd say you got the "worst case scenario" covered!

 

I finally got around to taking the snorkel off last week. I realize that it's in this thread somewhere but can someone quickly tell me if I need to do something with the EFI fuse and if I can find it's location in my owner's manual. Or just ignore the question, lol.

I can't say for sure if the snorkel removal has made a difference as I had forgot to hit the odometer when I filled up (I filled up last night though, I can't wait to see the results) but I swear I can visibly see the difference in my gas gauge. I deliver newspapers 80+ miles a night so I'm pretty talented at knowing how much my needle goes down per night.

 

After I took my snorkel off I reset it. Check out this thread it will explain how to do it. It made a 2mpg difference in mine.


https://www.scionlife.com/forums/viewtopic.php?t=33062

 

Night Shadows, you're my most favorite poster today. Thanks!

 

Not a problem. I have gotten a lot of help from people on here, just happy I can help someone for a change.

 

I pulled the snorkel last weekend, ran 2 tanks through to/from work, got maybe 1 mpg better.

I CANNOT get over 37 MPG!!! - No matter how conservative I drive!

I have 50K on the odo, so time to put in a new air filter and I am going to reset the EFI fuse. Maybe THAT will help.

 

This hasn't been working for me. Well, I normally get 28mpg and after filling up and checking my mpg at only half a tank, I got 33.99 and was very happy.

I then finally did the EFI thing. I thought I was getting good gas mileage at first but further down in my gas tank I got, the worse the gas mileage was getting (that might of been the case with the first tank but I didn't go any further than half empty) and ended up at my typical 28mpg.

Sooooo, I rechecked the EFI reset/removal whatever thread and saw that I messed with the wrong fuse, lol.

Sooooo, I just got done messing with the correct fuse. I really, really hope that does the trick!

 

two tanks into this test and I have achieved 32mpg's. Altho I have slowed down a bit thanks to gas prices too.

 

What possible connection is there between removing the snorkel and removing the EFI fuse or resetting the ECU?
The "rebooting" of the ECU is a misconception with no basis. It persists because it is an appealing placebo that does no harm.

 

I don't know about that - it may reset the a/f mixture fine adjustment that the engine has been doing as you drive back to factory default and that could make your mileage vary. Real test would be to reset the ECU on a low mpg xB and then drive slowly and see if the mileage improves.
I think the summer gas is here at last because I just drove home about 30 miles and got 47.2mpg and returned to my office via a different route of 19 miles and got 53.0 mpg carrying 12 gallons of water added to the xB on the return trip.

 

So, reset the ECU on a stock car before doing any mods? That's good one. I do like to reset mine every month just to keep it fresh and on its toes. Can't do any harm, can it ;-)

 

That IS the question - does it learn fast or slowly to adjust the A/F Ratio and does resetting it loose the aquired tuning?

 

I think I'm finally going to go out and do this mod.
I'm averaging about 32.5 mpg currently (x1.03 adjusted) and if I can add 4 mpg from this, that'll be sweet.
Is the concensus around 4 mpg benifit from all those who have done it?

So I should pull the snorkle and it sounds like I should pull the EFI fuse and let the ECU reset then correct?

 

You got it. Pull the snorkle and then the fuse, give it a few minutes then put the fuse back in and let it run for awhile. Should be good to go. I did it awhile ago and was averaging about 32 before I removed it and now I average around 36. So yeah 4 mpg. I even got it to 38mpg not to long ago. I only got a 2 mpg increase at first but now it has gone up to 4. So if you don't get the 4mpg increase right away don't get discouraged. Give it a few tanks and everything should be fine.

 

well i did it and so far compared to what i was getting 23.5 uncorrected i am now getting 29.5 uncorrected. i have taller aftermarket tires so not sure how the correction factor would go but being as though i calculated the same way with the same tires it shows a pretty dang big increase in mpg. now before you freak out about my mileage i drive very hard and very fast when on the freeway so i won't get nearly as good a mileage as most of you would to begin with.

 

That's a MONSTER increase in MPG! Way to go!

 

^^^^^^^^^^ yeah that was this am from jax to valdosta at speeds that coulda gotten me in BIG TROUBLE had i been caught. through the smoke/fog mix that is the current around here due to the fires in the area. so way fast and dirty dirty air pretty excited

 

You are probably running even higher mpg than you think - and you should consider checking your air filter. All that smoke got into it and clogged it up.

 

i have done the mod, which works great. My best tank was at 37.8 mpg. the only problem i am having is the efi fuse. I pulled it and waited about 30 min, plugged it back in, idled for about 15 min, and my service light still comes on. I have tried this many times. Now the service light is on all the time. Is my only option now to disconnect the battery?? I don't mind doing this but I just want to know if there is another way.