Idle To Fast

[gemguy]

HI CAN ANYONE HELP ME PLEASE MY IDLE ON MY GALAXY 1.9TDI 1996 ITS IDLEING AT ABOUT 1000RPM THE TEMP GAUGE IS WORKIN FINE WHEN ENGINE WARMS UP A BIT THE IDLE GETS A LITTLE BIT FASTER ONLY VERY SLIGHT CAN ANY ONE HELP ME PLEASE ??????

[Willie Krashitt]

Hi,

NO NEED TO SHOUT!

Several suggestions have been made on the post by MATTjr, but in addition to what has already been suggested, it might be one of the following:

TMAP sensor - (intake air temp and pressure sensor) If air temp signal is wrong, ie is sensing excessively cold, it will up the idle speed.

Alternator charge control - If your battery is on its way out, engine speed will be increased so as to increase output from the alternator. Same applies if heated screens, headlights, fans etc are all switched on.

Power steering - Not sure if allGalaxies have them (2.0/2.3 do), but many cars have a pressure switch on the steering rack/PAS pump that senses when extra load is required from the engine as you turn the steering wheel, upping the idle speed. If this switch is short circuited, it might be responsible.

Clutch switch - This switch when closed senses that you are about to put into / change gear, and on some cars increases the idle speed to reduce risk of stalling and to give a smoother gear change.

Vehicle speed sensor - If it sees a wrong signal, it might hold engine speed higher for a number of reasons.

 

Best bet to start with is to connect VAG-COM or at least a code reader and see what shows up.

Hope you get it sorted and post what you found out.

George.