Hey list, While trying to get my car to run better I came across a possible problem that might help me. First off I have to know there are 2 different ECU units correct? One is called the Lambda ECU and the other is the one that controls the Idle Speed Regulator, right??. I took off the wood panel behind the drivers side and saw that there were 2 blue tube things...one was coming off of the Lambda ECU and the other was coming from an other unit that was mounted underneath the other ECU (the one that controls the Idle Speed Regulator) One of my questions is what do these 2 blue tube things do. And also I have no power going to my frequency valve and the Control Pressure regulator. Would that cause my car not to run right? Right now when I turn it on the car will rev up to about 3500-4000 RMP but then if u let go of the gas it will idle at around 1500-2000 RMP. But then when you put your foot all the way on the gas pedal again it will work its way back up to about 3000RMP. But again if u have your foot lightly on the gas it will go up to about 3500RPM. At first I thought the problem was mechanical so I put a different Fuel Distributor on it, I got new injectors, the fuel pump is working so I am narrowing the problem down to something electrical so I am still trying to figure it out. I am also thinking it might be the Oxygen sensor, maybe that isn't sending a pulse to the Lambda ECU and maybe thats why I don't have any power going to the Frequency Valve. Could that be a possibility? DMC Joe does that sound right? Anyways, I am selling this car so I want to get it to run better for the future owner. Any and all help would be greatly appreciated. Thanks a lot, Nick VIN# 1852....for sale....e-mail for info