List all the symptons of idle surge please!!!

[1G/TS-ituner]

Recently my car has had idle surge, but it would eventually sit and idle a little under 1000 RPM and stay there

Now when i am driving at one speed, without giving it gas, the check engine light comes on and off randomly but when it's on and i go to give it gas it stumbles/buckles.(feels like it's misfiring) the light will also sometimes come on when it's idleing, but once i give it gas it goes away untill it idles for a few more seconds then it will come back on.

now i've tried adjusting the idle screw, i also pinched a small piece of vacume line in there to keep it from backing out.

now i've removed both honey comb pieces from the MAS but i did that the same day i got the car a week ago and it didnt start surging or buckling till lastnight. it's very intermitten. but the idle surges after i put the clutch in and it now it doesnt stop, it just subtly does it.

Can someone tell me is the idle controll sensor is bad?? or what else i should check, such as vacume lines, if so, which ones to check???

it's starting to get annoying, and it's stressfull enough to fight with a bad clutch and putting the sucker into gear, i have to slam it into second, third, 4th, and first is a hassle too. frankly putting it into 5th is the easiest. but if anyone can tell me where to start, and what to replace then major thanks in advance

 

[dave99gst]

Originally posted by 1G/TS-ituner

such as vacume lines, if so, which ones to check???

all of them.
check BISS
check ISC
INTAKE leak test it.
check TPS

 

[LAZPNO]

Start with the simple stuff... like putting the honeycombs back in. In my experience, the ISC going bad, or the BISS will not cause a CEL. Put the honeycombs back in and then let us know what is up.

 

[steve]

Don't guess, read the code out. The ECU is trying help you, even if the light is out there will be a stored code.

Sounds like you need a new BISS o-ring.
You can find testing procedures for the ISC on the VFAQ site.

Steve

 

[1G/TS-ituner]

okay i put the honey comb back in the bottom part of the MAS, but it still surges, i also checked the vaccume lines, and i found the one to the BOV was cracked where it connects, which could explain the check engine light to come on and off and stumble. but it still surges, now when i dissconected that green wire at the opposite end of the TPS sensor is stoped surging and every time i reconnected it to the prom, it would surge again.....now im not sure which is the culprit

 

[steve]

I don't think the BOV will cause a CEL but a bad TPS will and cause nasty bucking when your driving.

Steve

 

[1G/TS-ituner]

would a bad TPS cause the idle surge? or is that more of an IAC

 

[98RedGs]

Idle Surge Vfaq

Another large idle surge thread

If it is the ICS...

Check out those 3 links, they should give you the information you need.