The Chevy Cobalt was introduced in 2005 as Chevrolet's compact or subcompact automobile. The replica's fuel delivery is electronic throttle-controlled sequential multi-port fuel injection. Gigantic flow injectors are an available alternative, used primarily with engine upgrades compatible with the benefit of nitrous. Signs of impaired fuel delivery admit low aptitude, difficult starting and engine stalling while driving.
Instructions
1. Bare the hood of the Chevy Cobalt when the engine is chilled.
2. Allot the fuel force criterion Harbour on the Cobalt engine fuel contour. Whether you devoir aid finding it, direct to the owner's notebook for a diagram of the engine.
3. Remove the cap from the trial Harbour and attach a morals fuel pressure gauge. Screw the connector on tightly so you purchase a honest reading.
4. Influence the gauge so you can contemplate the dial. Buzz a helper to turn the ignition major to the early position. Arrange not inception the motorcar. Pocket watch the gauge thorn assign. Compose this as the anterior energy reading.
5. Remove the vacuum edge from the fuel pump impact regulator and evaluation for fuel. Mention to the owner's book for the borderline's mark. No fuel should be contemporary in the wrinkle. Whether there is, the engine problems are possible caused by a defective fuel pump impact regulator, which mode the fuel is not adequately pressurized when duration sent to the injectors, so there isn't Sufficiently fuel in the engine for it to gallop properly. Provided there is no fuel, reattach the vacuum limit and draw out with the fuel delivery diagnostic.
6. Alpha the engine and let it lazy while you remove the vacuum line again. Watch the pressure gauge.8. Start the engine and remove the fuel pump relay while the engine is running to relieve fuel pressure inside the engine. Any pressurized fuel in the lines is used and the engine quickly dies, allowing removal of the fuel filter without danger. Turn the engine off.
The gauge needs to register approximately five psi. If it moves down, the fuel pump is malfunctioning and needs to be replaced. Another option is that the fuel filter is clogged and needs to be replaced.
It needs to register between five and ten pounds psi. If the needle does not move, the pressure regulator is malfunctioning and needs to be replaced.7. Leave the engine on and watch the pressure gauge as a helper works the throttle.
9. Inspect the fuel filter for clogs. Use two wrenches the size of the fuel filter fittings. There are two fittings that differ in size. Grip the fittings with the wrenches and then drape a rag or shop cloth over the fittings and wrenches to catch any pressurized fuel that might still be lurking in the lines. Hold the wrench gripping the actual filter and turn the other counter clockwise until the bolt comes out. Remove the fuel line, set the bolt and washers in a safe place, and repeat this step for the other side of the fuel filter.
10. Use a flat head screw driver to remove the clamp holding the fuel filter in place. Remove the fuel filter from the Cobalt carefully as fuel is still present inside the filter.
11. Inspect the fuel filter visually for clogs and refit the Chevy Cobalt with a new filter if necessary. Simply reverse the filter removal process to reinstall the old or install a new filter. If the filter is in working order the cause of the fuel delivery problem is a faulty fuel pump.
12. Remove the fuel pressure gauge and replace the test port cap.
