hey so tonight i noticed that when im idling, my rpm jumps up from like 750-1250 and back down like continuisly, what could be the problem. could it be because i just cleaned out my egr ports and my ecu is like adjusting to it?

 

I actually think that is normal... haha... is your A/C on? that might be why too... usually at idle i have notice it starts out at like 1500+ then drops down... then the fans engage and it shoots back up.... then the fans stop.. and it drops back down.. its probably because you got the A/C goin or something..

I just cleaned my EGR too.. tonight... Man.. it was a pain takin that intake manifold off.. Did you take urs off?? Mine was caked with so much crap its not even funny.. took a drill to it... haha... lots of brake cleaner(great stuff) but now I'm getting some crazy problem tho electricly.. when i drive and accelerate it boggs down like its losing power.. my HUD just goes blank.. my gauges flip up and down... crazy stuff.. maybe i just put some wires back wrong... ill figure it out in the moring...

 

take off and clean your iac idle air control valve thats a common problem

 

Yes, look at the idle air control valve, throttle position sensor, MAP sensor, air and vacuum leak (bad gasket, hose off).

You might want to do a SEARCH on the subject -- it has been covered.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oodie &raquo;</TD></TR><TR><TD CLASS="quote">take off and clean your iac idle air control valve thats a common problem</TD></TR></TABLE>

One of the first things I would have done. Sometimes cleaning it might not help and you might need to buy a new one. Hows the coolant level? Sometimes that can cause a fluctuating tach.

 

naw i didn't take the manifold off, its not even in the way. i was running my heater on all night at like 2 or 3 cuz its been cold down here in so cal, that was the only time its ever done that.

 

alright well here's wut i did with the iacv, i took it off the manifold and flushed it out with mass air flow cleaners cuz that's what kragen said. it felt a lil better but the idle still jumps like 500 rpms. what else can i clean

 

Try the same thing with the FITV - that's the valve under the throttlebody. Look around here for a how-to post about opening that up & tightening something inside.

Then get rid of any air pockets in your cooling system.

Then look for vacuum leaks. (maybe you already did this??)