Please someone help me. My car has a very strange gurgling noise coming from the passenger side down below where your feet would go. It almost sounds slightly like running water. I can't hear it very much when the car is idling (except a little) but mainly when I am accelerating at low RPMs. Please someone help me diagnose this. Any help will be greatly appreciated. Thank you.

 

Sounds like air pockets to me.
Check your coolant at the filler cap. Re-check often and monitor your usage of coolant.

Hate to say this but the same exact thing happened to me last summer and my car needed a rebuild due to bad o-rings. Are you having difficulty starting the car?

 

I have the same noise and I just recently started having troubles starting the engine and replaced the battery, but I'm still having some problems. The alarm is acting funny also, maybe that has something to do with it?? Hope mine doesn't need rebuild, just rebuilt like 20K ago or so?? Any help or ideas??

 

No I am not having any trouble starting the car, but when I do start the car, the warm up period lately won't rev all the way up to 3000 rpms. It will only go to about 1500 or so. I hardly ever drive it. If it is the O-rings could that cuase loss of power. My car doesn't feel as fast as it used to, maybe I'm just used to it. Is there any way I can make the noise go away? Oh, and yes I do every so often have to fill the filler neck up with coolant. The overflow tank is always full.

 

Just in case you don't already know, the warm-up to 3k won't happen if you're in gear when starting.

My car also has water noises in the passenger compartment for the first several minutes when I start up, but it eventually goes away...I never need to top off the coolant, so I'm not exactly what it is, but since it only happens during warmup, I'm assuming that coolant is just sort of filling all the space that was drained with the engine off?

I dunno...

 

Change your coolant, and run a good cleaner threw the coolant system too... Mazda, along with major tuning RX7 companies here say change and flush 2 times a year. R U UP TO DATE?