i noticed a bubbling sound from my engine after long periods of stop n go driving. it happens after i start me engine and goes away in like 10 seconds. is this anything to be concerned? also, i notice my idle revs increasing everytime im in traffic. normal revs are at 500rpms and when im in traffic, it would jump to around 1500 rpms and stay there.

 

sounds like maybe your coolant esevoir is boiling over.. are you overheating?.. and maybe you have a vacuum leak?

 

wouldn't that register on the temp gauge?

 

Does it sound like a hookah or bong? My car did that for a bit...it went away after I topped off the cooling system. Try this: when the car's cold, open the cap and squeeze the top radiator hose several times to "burp" the system. Then top off with distilled water or coolant.

 

bingo! I bet he has coolent bubbles and you are hearing it in the heater core possibly?

 

its the blinker fluid getting hot

 

If the coolant level is too low, the sensor wouldn't touch the water and give a false reading. My mom blew the head gasket on her '84 Tercel 4WD wagon twice because of that same reason.

 

hence the reasons for defis (or any other "real" gauges)

 

same kidnve deal happened with my 1st car, 92 civic 4 dr (1.5L powah!!)...i knew it was overheating but the gauge never said so.. until AFTER the HG went, then the gauge told me it was overheating

 

I think Defi's would have been overkill for that application. :rotfl:

Anyhow, it did have a gauge (of sorts), not an idiot light. It would only run at 1/3 up the guage when the level was low, instead at 1/2 way when the coolant level was good.

 

Why is a Defi overkill, it could save your motor and if you already have the controller for other gauges (ie oil temp, egt, boost) then why not? Idk but my 4th gauge will most likely be the amber bf water temp gauge.

 

I was referring to Defis in my mom's Tercel.