I got a corrado g60 since a couple of weeks. Runs fine and all, only the idle engine speed is too high. Most of the time it runs 1500 rpm, sometimes even more.
So I try to fix it myself, before hiring expensive vw mechanics to do it for me :^)
Today I replaced the blue temperature sensor and a few hoses which didn't seal properly, but it didn't help a lot >:^\ I also checked grounds and all, and a few weeks ago I brought it to an generic car workshop to fix any vacuum leaks.
Right now I'm suspecting the little switches on the throttle body. There are two of these, one for idle throttle, and one for wide open throttle.
So I tested the following:
I let the engine run with the throttle opened up a little, so the throttle didn't touch the 'idle throttle' switch nor the 'throttle wide open' switch.
Then I pushed the 'throttle wide open' switch. I expected the engine to rev up a little, because of extra gas received because of enrichment or something like that, but instead it revved down. I think that's odd.
Can anybody explain me how these switches should affect engine rpm?
I weakly remember something about two types of throttle bodies for the corrado, is it possible that they replaced mine in the history (before i had this car) and fitted the wrong one, where the buttons switched position on the connector or something? (Can be rubbish just as well ;^)) It feels like the buttons are working opposite or something, giving wide open throttle enrichment when idling, and idle throttle when throttle wide open???
When I turn on everyting electric (lights, heating, etc etc), it idles just fine at 850, so the engine doesn't steer it on purpose to 1500 rpms.
Any help will be greately appreciated, caus I wanna drive it!
I need to wait in traffic jams every day to get to my work and when your car is idling at high speed this sux :^D
Grtz, max