Automotive service bulletins

Save time with automotive service bulletins. The first step for most professional auto mechanics when diagnosing car problems is to locate or at least look for a service bulletin.

This often provides information that will quickly solve a given auto repair problem. I have a video below that shows you just how easy this can be.

But let me give you some quick examples of how to use automotive service bulletins to your advantage. The following are some difficult problems that are quickly discovered by using technical service bulletin information.

Service bulletin information

If the injectors become shorted they draw excessive current. GM electronic control modules have a quad driver that operates the injectors.

When the resistance rises in the fuel injectors the quad driver will sense that resistance and stop operating the particular injector that has the high resistance.

This action protects the quad driver, which is an internal component of the vehicle's main computer.

The service bulletin provides repair diagrams and specifications to troubleshoot individual injectors.

It also contains the part numbers of the improved replacement parts so you are not buying a dealerships outdated stock.


Give this car repairs resource page a

Automotive service bulletins demo

Diagnosing car problems with service bulletins

This is an example of an auto repair bulletin issued by Chrysler on early 90s vehicles equipped with a 3.3 L and also the 3.8 L engine.

Chrysler experienced some low-speed surging during engine warm-up on these engines. The complex problem was detected by Chrysler engineers and documented.

These Chrysler gurus found that the port fuel injectors sprayed against a hump in the intake port. As a result fuel puddles behind this bump, especially while the engine was cold.

When the engine temperature increased this fuel evaporated and caused a rich air fuel ratio and also engine surging. Chrysler corrected this problem with a new part number and redesigned injectors.

These new injectors were angled with the orifices positioned so that the fuel sprayed over the hump in the intake. When the angled injectors are installed the wiring connector must be positioned vertically.

Angled injectors have a tan exterior body that indicates that this is the updated fuel injector. Car mechanics without this automotive service bulletins information would find it very difficult to solve and correct this engine surge problem.



If you would like to see another demo video that shows you some more key features about this online auto repair help program this next link takes you from automotive service bulletins to car repair manuals



Search both of my automobile websites and the Net at the same time.

Custom Search