need to know if this is normal

my car is idling in my driveway and it will idle at 2000 RPM and then sometimes go down to 1000RPM, then back up to 2000 RPM , and back down to 1000RPM, anyone know what this might be, i was going to adjust my throttle body but i'd figure i'd ask here first.

 

thats not normal at all.

normal idle is around like 650-750 i believe

 

BTW it's +5 degrees celcius here today so it's not that cold, usually it will idle a bit high if it's cold out, but it's like it's jumping between 1000 and 2000RPM , i looked at the throttle cable and it isn't tight, it's fairly loose actaully.

ALSO i have a leak in my rad which im replacing monday when it gets here, would that have anything to do with it.


Modified by 94IntegraNL at 2:56 PM 3/27/2004

 

sounds like a vacume leak

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Heylookits shawn &raquo;</TD></TR><TR><TD CLASS="quote">sounds like a vacume leak</TD></TR></TABLE>

would a leaking rad have anything to do with that. this doesn't happen all the time.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Heylookits shawn &raquo;</TD></TR><TR><TD CLASS="quote">sounds like a vacume leak</TD></TR></TABLE>

sure does. check you vacuum lines, and idle should be at 750 +/- 50

 

i don't see any leaking around the vacuum hose

 

spray some carb c;eaner around ur vac. hoses...if theres a leak the car should bog

 

check your TPS[throttle position sensor] its on your throttle body.if you have a multimeter it should read .5 volts at ilde.

 

yep, i'd say TPS or maybe even spark plugs. my rpms used to idle weird like that too. so i'd say your TPS is off or one of your spark plugs are misfiring. goodluck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94IntegraNL &raquo;</TD></TR><TR><TD CLASS="quote">

would a leaking rad have anything to do with that. this doesn't happen all the time.</TD></TR></TABLE>

low coolant will cause surging, fill it up and recheck

 

it stopped, i think it might have been air locked, soon as i took off the cap to the rad and it stopped.