1G idle surges

[xad_theman]

i recently bought a 1990 eclipse gst. exhaust system, hks ssqv vented to atmosphere. for some reason i keep on having random idle surges... it isn't horrible, but it is noticeable... i woul dbe cruising, comes to a stop, and it would jump from like 700 - 1500, and back and forth and back and forth and then go back down to 700 - 800 where it should be... can anybody point me in the direction of why this is happening?

also another question.. when i'm cruising in forth, and go WOT, i hear my turbo spooling and such, and then i watch my RPMs, it hits about 4k to 4.5k and then drops to 3k and starts going back up again.. help me!!

 

[liquordrunk]

So the car is completely stock. you should not be VTA.. That could very well be your problem.

 

[SoonToBeDSM06]

He is right. If you don't have a GM MAF and a MAFT in a "blow thru" setup then you shouldn't be venting. Venting to atomos. causes all sorts of problems

 

[versatilx1]

http://www.dsmtuners.com/forums/showthread.php?t=113858 it should explain to you the do's and dont's,etc

 

[xad_theman]

yeah, i know.... when i bought the car, it came vented.. looking for 1" ID hose so i can vent back into intake...