Reset your injector timing to compensate for the added boost at idle
I have 200,+ miles on the car. I change the plugs and wires yet it runs rough at idle and runs smooth at crusing speed. What can i do?
With any turbo it is a good idea to let the engine idle briefly before turning it off. This allows the turbo to slow down before losing lubricant. If you don't let it idle it probably won't hurt anything, but over time it may cause the turbo to wear out faster.
distributor shaft
14 psi
The TURBINE inside a turbo-charger stops spinning when the vehicle is at idle because there isn't enought exhaust pressure to keep it spinning, lowering the internal engine pressure. creating less wear on the turbo and engine also alowing the engine to idle.. if it was to continue forcing air into the engine it would also need to force gas. to match the air fuel ratio to keep the car from dying, causing the engine to rev.. not stay at idle..
Some turbo cars will be fitted with a turbo timer, which keeps the engine running for a specified time after the ignition is turned off. This allows the turbo to cool down before the engine shuts off, which prevents potential damage to the turbo.
Try some fuel injector cleaner in the tank.
bISS iDLE SCREW ON THE THROTTLE BODY
If a Carina Turbo will turn over but will not idle there can be an air leak. The vacuum lines should be checked to see if there are any holes.
idle air control valve needs work. either clean it inside and out or replace it. could also be the maf sensor
the idle speed motor is stuck if it is a turbo, take it out, clean it and re-install, plus loosen tps screws, wiggle and re-tighten. if non turbo, probably vacuum leak at egr valve the idle speed motor is stuck if it is a turbo, take it out, clean it and re-install, plus loosen tps screws, wiggle and re-tighten. if non turbo, probably vacuum leak at egr valve
turn the idle screw on the throttle body