Testing and adjusting wastegate

I have 6TS Cat in my truck that I have replaced with the larger BW turbo that does not have a wastegate on it.

I always heard you don't need wastegate unless you do alot of city driving???? Why not just lock it closed?

 

You can unbolt the wastegate actuator where it bolts to the housing and put a washer in there to pull it away from the housing.
This takes up the psi before it opens because the spring in the actuator has become soft and opening early.

 

In the manufacturer area you can select to have the ECM reset. Do you have JPro by chance? You can do a reset with it as well.

I will access a CAT engin tomorrow on the customer side and see what steps it takes. I will also see if I can get a step by step out of one of the manuals from my CAT tech.

 

Not 100% sure on the Acert but single turbo cat's don't have a wastegate setting in the ecm. Well actually the MBN's do but theres no setting in the ecm to adjust or reset

 

The wastegates are completely manual on a CAT engine and have no adjustments in the ECM that can change the opening and closing settings in CAT ET.

 

If you want to see what your waste gate is doing hook up an air line with a paint regulator to the actuator can and slowly turn up the pressure while watching the actuator rod, when the waste-gate is about half way open look at the gage on the regulator, thats about what you have for boost.
Another little trick to liven up your motor a little is to pull the hose on the actuator back a little and then drill a small hole in the steel tube. This will delay the opening of the waste gate a little without affecting the boost setting, as long as you don't go to big with the hole. I think the size was .060 or .070. (sorry it's been a while). If you do not like what happens just push the hose on a little more to cover the hole.

 

I was referring to resetting stored driver habit parameters due to his fuel injector adjustment and overhead. Not for the wastegate. Wastgate is manual on nearly all diesel engines, except BMW. They are a nightmare to even look at...

Was trying to help with loss of power due to injector adjustment.

 

Cat's don't save driver habits for fueling purposes. Only for keeping track of things like fuel mileage, trip mileage, tops speeds and etc.

 

Well got a little time on that truck today. Took the wastegate off and broke one of the studs off it. End of the day too...go figure. Went out to the trailer found three extra turbos with wastegates. The first was identical so I started taking it off...guess what...broke a stud off that one too. This little studs take a beating next to the turbo and exhaust manifold. Picked up the next one and lo and behold...its a CAT turbo with an adjustable wastegate. So I took it and compared to the old one. It was to long. So I cut the threaded part down about 3/4" and was able to get it about right. I tightened it about a 16th of a inch tighter than the old one. Doing the same thing as placing washers behind it as stated earlier. Wastegate was nice and tight. Went for testrun (bobtail) and was able to get 25psi no problem with a high of 29psi. She spools alot faster now too. I'm guessing wastegate spring a little worn as said earlier. Would have be really nice if they all had adjustable turnbuckles.

Mr. Haney found the crimps on the turnbuckles you were talking about...what a waste. The washers would have worked great though C16Kiwi...will probably do that on the next one. She is alot peppier though. She has a sister truck at on our yard also. Recalibrated speedo on it today. Not nearly as peppy. The two are actually consectutive serial numbers. Anyways...going to run the overhead soon and make sure we have the right trims on that truck. Then make sure we are boosting like the other. Its kinked off and doesn't boost as well as the one I adjusted today. Anyways thanks for all your help...learned alot on this thread.

 

The new CAT engines do. I just reset a C15 Friday for that purpose. It tracks the driver habits and will make adjustments to throttle response and fuel. These engines have this software to "increase" fuel mileage, but don;t work. It is an option that the dealers will try to "upsale" to the customers. We usually remove it and reflash the ECM. It is junk software. CAT knows this, but refuses to recall to get rid of it.

It is supposed to "provide more torque and horsepower when demands need it" and keep the fuel cutback when it doesn't by limiting the spray intervals from shooting 4 sprays (BTDC x 2, TDC x 1, ATDC x 2) to just 3 sprays (BTDC x 2, TDC x 1). The program adds slow response to the engine, low power when demands needs it, low bottom torsue until the ECM program can catch up.

This is what I was basing my knowledge on.