My younger brother just bought a 91 Cressida a few weeks ago. Anyway he got a new stereo installed and now whenever the engine is at operating temperature the idle drops to about 5-600rpm and the car shaked when you tried to take off.
I thought the stereo system must be drawing current and hence more load on the alternator and cause the rpm to drop, like when I turn on my headlight in the Sprinter. So I turn off the stereo but it didn't make any different. So what is going on? does the amp in a stereo system constantly drawing current even when you haven't got the stereo on? dodgy wiring?
Where is the idle adjustment on the engine its a 7MGE i think. What is the recommended engine oil to use? we haven't got a handbook with car.