What happens when you have a vacuum leak?
When a vacuum leak occurs, some air enters the intake manifold without passing through the throttle body. The ECU, meanwhile, injects the amount of fuel necessary based only on the measured air-flow. This results in a lean fuel-air mixture, which then leads to erratic idling and lacklustre low-speed performance.
Will the check engine light come on if you have a vacuum leak?
4 Check Engine Warning Finally, because the vacuum system does not have a warning light of its own, your automobile’s engine control unit will turn on the check engine light to alert you of the vacuum leak. This throws off the engine’s combustion and results in a check engine warning from the engine control unit.
Where are the vacuum hoses on a Volvo?
There were five vacuum hoses on our turbo model. Remove the lower hose from the IAC valve, then remove the turbo intercooler to throttle housing tube. Be sure to check and clean all the vacuum ports on the tree and at the other ends of the hoses where they go into the turbo duct by the turbo (See Photo 5).
Where is the air intake on a Volvo 940?
Connections along this tube include: Idle Air Control Valve hose, PCV hose, intake box, throttle body. The flexible intake tube itself may also leak along the joints. The Volvo 940 has a thermostat just before the intake box which is normally open in warm weather.
Where is the coolant supply line on a Volvo?
The only things not clearly shown here are where the coolant supply line connects (180 degrees from coolant outlet connection) and oil outlet line (180 degrees from the oil supply line mount point). Inspecting Turbo Intake Hoses. [Inquiry] I’d like to clean and inspect my turbo hoses.
What to do if your Volvo oil is clogged?
Remove the lower hose from the IAC valve, then remove the turbo intercooler to throttle housing tube. Be sure to check and clean all the vacuum ports on the tree and at the other ends of the hoses where they go into the turbo duct by the turbo (See Photo 5). The hoses will also become clogged over time.