so yesterday i go and do the water trick. i used the top vaccuum line on the UIM. it drank about 1.5 liters of water. after that i drove it to school and it was nice and smooth, like it's suppose to be. and since this is s. florida, i put the A/C on. after a while on the highway, i get to school and turn the A/C off.
all of the sudden my idle gets *very* shakey. it also backfires a little (it always has)

when i put a very very light bit of throttle on it it'll rev up to about 900 but still be shakey. but when you actually put some weight into it, it'll rev just fine.

to me it seems like a vaccuum leak, but i don't have a vaccuum tester, nor do i know where all the lines go to.

i just need assurance that i didn't break something, which i'm pretty good at doing. and if i maybe just broke my motor mounts due to the extremely violent spasms the engine had while feeding it water, that would be a welcome diagnosis.

 

I'd check & clean the plugs.
Maybe a loose piece of carbon fowled one.

 

You put 1.5L of water in the motor??? WTF?? Why on gods earth did you do that?

 

Maybe because we wanted to steam cean the engine. :p

 

You haven't heard of the water trick???


Just a question... how long did you let it drink this? Like... 1.5L in 5 minutes or somethin?

Rotaries don't hydrolock... they just run bad. When the water gets in there.. it basicly steam cleans the rotor faces... breaks up any carbon. A good trick to do evey 60K miles or so... I need to do it sometime...

 

Ummm well thats the water trick...steam cleans the carbon out of the engine and is proven to work well, rotaries dont hydrolock which is awesome! My buddy hydrolocked his slammed 83 prelude (that bitch was REALLY low no suspension i think and his custom ghetto rigged intake was near the bottom of the engine bay hey i told him it was a stupid idea...) when we were drivng once, hit a puddle. Damn that feeling sucks!

 

which vaccum hose do you pull on a T2 that'll clean both rotors.

 

projekt,

-Curious... afterwards, did you redline a couple times, or drive normal?

 

Actually, like any other engine rotaries can hydrolock. Its just in the manner your doing it in not enough water enters the engine to do so.

Also sounds like you need some buddies

 

i think some of you guys need to SERIOUSLY consider the consequences of the advice you post on this and any other forum. This "steam cleaning" trick is just the latest fad ive seen cross this forum, along with the "ATF" trick. People can seriously damage their cars if they don't know WHAT they are doing and WHY they doing it.

 

i did both. i revved it freely in the driveway and then shut it off. about an hour later i turned it on and started to drive to school. it idled perfectly, until i turned the a/c on and then off. that's when the trouble started.

 

Sounds like the BAC valve jammed or broke... it activates when the air condition is on.

Probably not related at all to the water treatment.

 

can you guess what the one of the biggest causes of broken apex seals is? peices of carbon comming lose and hitting them.

the last thing I'd want to do is losen up carbon in the engine.

 

If its built up to that extent in there already it's going to come out anyway at some stage.....

Thats why I used to think the ATF soaking would be an ok idea, but on tear down of the aformentioned engine I let sit in ATF for a year, there was still good chucks of carbon caked all over the rotors...
Carbon - 1
ATF - 0

 

Well keep us posted.

I'd like to see the end of this. hope you didn't blow up your motor.

 

ive pulled a couple of motors apart recently, and if it wasnt burning oil, the rotors really dont have any kind of buildup on them at all.

before you run out and potentially ruin your engine, you might want to see if you actually have the problem first.

 

I need a new battery

 

i took the car to a rotary shop today and his opinions after seeing it were 1. clogged primary or 2. low compression on front rotor.

Icemark, i'd like to know exactly what you mean because my older mazdas have always had messed up idle air bypass systems.

 

thank you icemark, you're the man. it turned out to be the AWS although it took a freaking hour just to find the damn thing.

 

if you took it to a rotary shop, shouldn't they have been able to check the compression fairly easily and fast which would eliminating or prove varible #2?

 

I let a motor soak in diesel for a while, diesel EATS carbon, its great!

 

only rotary shop in palm beach county, ie. busy, very very busy.

 

if i were to do the atf trick and water trick, witch should be done first and how much time between doing them like 300 miles, a week?

 

bump

 

Dont do the ATF trick unless there are problems.

Do the water trick whenever you want. Once a month should be fine