[navynuke0407]

I have a 99.5 Jetta 2.0 and sometimes on occasion when i start her up the rpms go up to about 2-2.5k and then slowly get down to 1200 and stays there... anyone know what is the normal idling rpms for the 2.0 engine... and anyone know what could be wrong...

 

[navynuke0407]

help anyone...

 

[shmitty]

throttle position sensor?

 

[shmitty]

or probably cause its cold..

 

[Dmez]

or probably cause its cold..

x2 generally your car will rev high until it starts to warm up

 

[Untitled]

My subaru used to rev high like 2.5 3 and slowly go down as it warmed up...

 

[Dmez]

My subaru used to rev high like 2.5 3 and slowly go down as it warmed up...

yep my buddies kia does that

 

[navynuke0407]

ok it did it to me the other day on a nice 85 degree day after i had drove the car for a decent portion of time... another thing... when shes warming up shell get to normal op temp of 190 and then gage will go back all the way down... and will not go back to 190 unless i start tacking out some rpms...

 

[shmitty]

because the thermostat opens

 

[Dmez]

if ur temp gauge drops for no reason, i'd check the sensor/thermostat. Idling or driving, once it reaches NOT it should stay there.

 

[navynuke0407]

yes this i know... my ford probe gt went through thermostats like crazy... lol... figure maybe the thermostat gets stuck open... bc sometimes it wont even go up... and sometime it does and quickly goes back down... yes the thermostat opens shmitty but it should close soon thereafter to prevent to cooling or normal system operating temperature will not be reached therefor system effeciency will suffer...

 

[Untitled]

Thats also a ford this is a V-Dub....

 

[ReturnOfTheJetta]

My VR6 only warms up at 1k (or 10 because of German cars lol) and then drops down to maybe 5-6k for idle... Obviosuly it's not the same 2.0 like you, maybe it wamrs up higher rpms because it's a 4-cyl? My ol' 86 Corolla SR-5 warms up quite high in the rpms too, sometime close to 3k rpms.... But then again, it's carbuerated....

 

[navynuke0407]

technically its a mazda but yea i get ur point