What causes EXCESSIVE moisture in exhaust?
 

I have a 1989 CRX HF. It is completely stock. I just put on cap/rotor/plugs, air filter, new valve cover gasket kit and changed the oil change. The car has had this issue since I got it a few weeks ago. It used to want to stall out if i reved it for a while and then let off the gas, now it runs very well no matter what i do to it but there is tons of moisture coming out the tailpipe. If I really rev it it makes a puddle.... doesn't smell or look like coolant... there is some smoke too, looks white, but doesn't smell sweet and there is no oil or bubbles in the coolant which is in the new radiator. https://honda-tech.com/forums/images/smilies/emsad.gif

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

Its just moisture and its perfectly fine..... as far as what it is, I don't know.

Re: What causes EXCESSIVE moisture in exhaust? (strictlyimport)
 

I am concerned that the Inspection ref here in NJ will fail me for "visible smoke" and not buy that it is just moisture... https://honda-tech.com/forums/images...s/emthdown.gif

Re: What causes EXCESSIVE moisture in exhaust? (strictlyimport)
 

perhaps water is trapped in cat

Re: What causes EXCESSIVE moisture in exhaust? (vtecn8ive)
 

a lot of cars do it, and it's usually ok; water is a natural by-product of combustion. have a look at a few tail pipes next time you're in traffic and take off from a stop light.

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

its your catalytic converter working well. you wont be failed for this...

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

I don't think that it is visible smoke, just evaporation from the water. Does it leave a cloud of smoke, or does it disappear quickly?

Re: What causes EXCESSIVE moisture in exhaust? (Tyson)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">its your catalytic converter working well. you wont be failed for this...</TD></TR></TABLE>

https://honda-tech.com/forums/images/smilies/emthup.gif

Re: What causes EXCESSIVE moisture in exhaust? (strictlyimport)
 

It leaves a cloud, but that disipates in the same amount of time as I was reving it..
I woulkd love to think its just steam, but something just dosn't seem right about it... my 90 crx never has done this... https://honda-tech.com/forums/images/smilies/emsad.gif

i own a 90 crx hf that i bought as a shell and put a stock d15 in it to save gas and money. it has been doing the same thing. if it doesnt smell like coolant or oil you should be ok. i dont know if it could be the cat because this is the first car that i have ownd with a cat!

Re: What causes EXCESSIVE moisture in exhaust? (Tyson)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tyson &raquo;</TD></TR><TR><TD CLASS="quote">its your catalytic converter working well. you wont be failed for this...</TD></TR></TABLE>

really, it is. ´nuff said. https://honda-tech.com/forums/images/smilies/emthup.gif

Re: What causes EXCESSIVE moisture in exhaust? (rsca_crx)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rsca_crx &raquo;</TD></TR><TR><TD CLASS="quote">

really, it is. ´nuff said. https://honda-tech.com/forums/images/smilies/emthup.gif </TD></TR></TABLE>

Amen.

Moisture, or water vapor is present in the exhaust as a by-product of combustion and the catalytic converter.

Re: What causes EXCESSIVE moisture in exhaust? (GreenBean)
 

yeah it's just water in the moffler..i had the same issue when i got my rex..just drive it around for a couple of days and it should be gone

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

If there is excessive water in the muffler, then it is likely caused by taking numerous short trips that don't allow the exhaust system to warm up sufficiently to boil out the excess water. Try taking the car for a long drive. This will probably get ridof all the water.

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CustomVW &raquo;</TD></TR><TR><TD CLASS="quote">I am concerned that the Inspection ref here in NJ will fail me for "visible smoke" and not buy that it is just moisture... https://honda-tech.com/forums/images...s/emthdown.gif </TD></TR></TABLE>

When you go to smog your car you wanna drive it hard and for at quite bit of time. Once the car has been running for a long time all the metal in the exhaust system will be hot enough to where the condensation and water collected will be evaporated and blown out of the exhausts.

My rex did the same thing when i first got it. The previous owner had no cat whatsoever. Used to leave large black puddles when I revved it in the driveway. I put a new high flow cat on it...no puddles.

Re: (VegaS10)
 

I have noticed a lot of liquid and i have decided that it is just water; like everyone has said. I don't drive my car for long at all at a time maybe 10 mins so the whole water build up thing is probably happening to me.
Also about the smoke i'm having the same problem as u and do not kniw if it is condensation or a blown HG. I think my car smpked a little when it was summer so i think i have a blown HG.

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

Well it looks like my "white" smoke is really "blue" smoke..... i am going to buy a compression tester and start there, but why would it run "seemingly" perfect but smoke like a chimney???? https://honda-tech.com/forums/images/smilies/emsad.gif

Re: What causes EXCESSIVE moisture in exhaust? (CustomVW)
 

ur running too rich

Re: What causes EXCESSIVE moisture in exhaust? (StorminMatt)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StorminMatt &raquo;</TD></TR><TR><TD CLASS="quote">If there is excessive water in the muffler, then it is likely caused by taking numerous short trips that don't allow the exhaust system to warm up sufficiently to boil out the excess water. Try taking the car for a long drive. This will probably get ridof all the water.</TD></TR></TABLE>

https://honda-tech.com/forums/images/smilies/emthup.gif

Re: What causes EXCESSIVE moisture in exhaust? (gutterslide)
 

The short trips that i always take may have had moisture in my exhaust. I have taken my car for longer drives since this thread and there is now no smoke.

floor it for a good 5 minutes to get rid of excess moisture in your exhaust. This is what causes most of the rusting on non stainless exhausts.

blue smoke it oil smoke

Re: (SETI20)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SETI20 &raquo;</TD></TR><TR><TD CLASS="quote">floor it for a good 5 minutes to get rid of excess moisture in your exhaust. This is what causes most of the rusting on non stainless exhausts.</TD></TR></TABLE>

Did that, no change....

Re: (NACvicSi)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NACvicSi &raquo;</TD></TR><TR><TD CLASS="quote">blue smoke it oil smoke</TD></TR></TABLE>

I know, and I suspect valve seals, but I just don't understand why it still runs so well (well at least in the parking lot, never had it on the road)....