How much psi does an injection fuel pump produce?
An injection fuel system usually produces between 15 and 40 psi (pounds per square inch) (100-280 kPa) or more, depending on the application.
How is pressure controlled in a fuel injection system?
Another means is to vary the effective displacement of the high pressure pump. By carefully controlling the amount of fuel entering the pump and avoiding compression of excess fuel to high pressure, the fuel injection system hydraulic efficiency can be improved and generation of excessively high fuel temperatures can be avoided.
Why does the common rail injection system have a delay?
One important reason for this is that the system now includes a delay introduced by the high pressure pump. Metering the pump’s inlet flow will have the longest delay since the system delay includes the pump’s induction and discharge strokes; as a result, relatively higher rail pressure fluctuations can be generated [ Bosch 2007].
What causes a Saab 9-3 fuel injector to go bad?
There are two main ways that your injectors can go bad. The first is for them to become clogged, dirty, or unresponsive. When this happens not enough fuel enters into your 9-3’s combustion chamber. The other way is if the injectors are leaking.
What kind of injection pump does a 125bhp Saab use?
The modified injection pump on the 125bhp version is the VP44 pump that has the ECU integrated into it. Be sure that any garage changing this pump can programme the right calibration into the ECU as well. A neat technical solution but adds to the cost if it needs replacing.
How much does a Saab 9-3 Tid injection pump cost?
After a bit of failure to start and getting going but packing up twice in a week, my partner’s T plate 9-3 diesel is in the main dealer needing a £2000 “fitted” injection pump. The car is worth about £4K and won’t be worth any more when it has been repaired!
What causes a Saab 9-3 engine to lock up?
Engine Locks Up – Once too much gas gets in the oil, the motor will lock up. If you have reason to suspect there is gas in your oil, do not drive your 9-3. Change the oil. Leaking fuel injectors are often caused by a bad a crack in their body.