High Idle

[xxShaneOmac]

My friend just bought a 1g and it idles at 2g
DSMLink is set for 1g and maft base is calabrated for his 660's


We cant get the idle down
Im thinking hes got some bad / cracked vac hoses.
What vac hoses affect the idle on a 1g?

Or does anyone else have any ideas on how to fix it?

Mods
16g evo3
evo3 mani / o2
255
afpr
660
dsmlink
maft
autozone air intake pos

91 gsx w/ 135k on it.

 

[JohnCIV_Talon]

Possibly just use the biss screw to turn it down. Do you know where it is located? Do a quick search on "biss screw" and you will get good info.

 

[DSMULATOR]

It doesn't have to be any specific vacuum line to increase the idle. A vacuum leak pretty much anywhere can have that affect. Give it a boost check to find out. There are a few posts that show you how to make a homeade one

I do know that when running DSMLink and a GM MAF you want to zero the MAF translator (like you were running stock injectors) and make all your fuel calibrations in DSM Link.

 

[AK_4g63t]

DSMULATOR is right. A vacuume leak almost anywhere will cause a higher idle. Preform a boost leak test. I think I built mine at Home Depot for $10. You also can take a can of starting fluid and spray around the throttle body gaskets and intake to block gasket. If the idle gets even higher you know that the motor is sucking in that extra air with the starting fluid.

 

[chanley talon]

I had the same problem today. It was the throttle linkage pulling slighty to hard on the throttle .. Push it all the way shut and make sure its closed when idling.