2WS Cat Problems – Common Issues And Fixes

It is never fun to deal with 2WS CAT problems.

While this is generally a good CAT engine, there are some issues that can come along. This is why we highly recommend checking what the causes are and dealing with the problem based on the actual culprit.

In today’s post, we will discuss these common 2WS CAT problems and some things you can do to get them sorted out. Here we go.

2ws cat problems

Common 2WS CAT Problems

Some people have complained about the engine being upgraded with a new fuel pump and sensors installed. However, even with these upgrades, the engine seems to continue stuttering when at a high range of RPM such as at 1500 or more. This also happened ever since the injector O-rings have been changed.

According to experts, it is good to check if the check engine light switches on when this problem arises. But if it does not, the first thing to look at is the engine’s fuel pressure. You need to see if the pressure range is at a desirable 75 to 90 PSI. This is important since if the low pressure is quite severe, the engine may stutter. 

A low pressure issue can arise from regulator valve problems, or you may also have issues with your transfer pump and filters. On the other hand, there may be a high fuel pressure due to a stuck relief valve in your transfer pump or a return line restriction. 

It is good to observe if the fuel pressure has already been measured while the problem occurs. If so, you need to determine what it is. In case the fuel pressure is good but the engine stutters, and there is no check engine light switched on, it could mean other issues are present. 

In case you have a good pressure level but the fuel continues to go down, it may mean that your ECM detects something. Perhaps it is a low boost. So, it is good to check the boost pressure once you notice a problem. 

Some people who have replaced their injector cup O-rings deal with issues such as the O-ring material coming off and many of the injectors become clogged in their return line fitting. So, the fuel pressure appears to be normal while the fuel gets hot right in the head.

As a result, the engine tends to cut out and may run poorly. The fuel pressure may appear to be okay, all because of the relief valve opening in your transfer pump. 

So, we recommend removing your fitting located at the back portion of the head. Check if it is clear. If so, you need to check your return line all around.

In the event that the boost pressure did not drop, then it could be a concern with your wastegate opening. But then, it may also be your injectors acting up. You will have to verify this problem by having someone turn your engine on and keep it running, then you can conduct a cylinder cut out test to check for problems as you drive.

After doing the cylinder cut out test done of your cylinders, you should be able to find a fault. If so, you can check the electrics on your injector. But if you have already replaced it with a new one and have been getting a code still, then it may be a concern with the harness connector to your injector. You may change your harness out, and this can sometimes fix the problem.

Overall, we highly recommend that you start by checking for fault codes. Then, proceed to run through the overhead adjustments and determine if they are within the specifications required. Inspect your exhaust port temperatures and check if any of your cylinders run colder than others. If so, it could mean there is poor combustion happening in that cylinder. 

Set your injectors properly with your injector timing tool. When you have a faulty injector, this may lead to your engine stuttering or stalling. So, you may want to consider installing a site glass or clear hose on your suction side and also your return side, as this should help to monitor for the fuel’s aeration situation. Check if there are bubbles – if there are then it means there is damage to your injectors. Therefore, the only thing left to do is to replace them. 

Now, if your injectors pass the aeration test, then it means the mechanical aspect should be all good. However, the ECM driver may be problematic, so you should also test out the ECM and just have this replaced to resolve the issue.

Read More: Know More About Cat 3126 Engine Problems

Wrap Up

Some 2WS CAT problems may come along at certain points. So it is good to conduct some tests to determine the source and have the issue remedied according to the root of the problem, as we have shared in this post.

Leave a Comment