Why is my cat C15 engine running rough?

We found a dent in a male fuel supply line fitting. The fuel was not leaking out of this fitting but it allowed the engine to suck a small amount of air and was causing the engine to run rough and miss fire.

Are there any problems with the C-15 cat?

C-15 Cat Engine Problems. Discussion in ‘ Trucks [ Eighteen Wheelers ] ‘ started by dave_0755, Nov 4, 2010 . I’m hoping someone with knowledge of the C-15 can help.

Can a C-15 cat engine burn fuel?

It’s not the same as an “E” or the first C15’s (6nz) there is absolutely no power above 1500 and running one there will do nothing but burn fuel. You say it’s getting hot but you never said what the temp is.

What to do if your cat C15 engine is leaking?

Air might also be found on the return line to the tank, but be careful as some bubbles in the fuel is normal. Try pressurizing your fuel supply lines/fittings with shop air and check for leaks with soapy water. No codes or engine light (even intermittently)……. right?

C-15 Cat Engine Problems. Discussion in ‘ Trucks [ Eighteen Wheelers ] ‘ started by dave_0755, Nov 4, 2010 . I’m hoping someone with knowledge of the C-15 can help.

Is the C-15 engine idled at 1000 rpm?

If you read your manual the c-15 should be idled at 1000 rpm if has to sit longer than 5 min. I have seen this before on a few Mack trucks in Australia.

How often does a cat C15 engine die?

Lately, it’s also been real bad about losing prime, so about one out of ten times I start it up, it loses prime and dies, then I have to use starting fluid to get it started again. I’ve had it in the shop, both Cat and Peterbilt, more than 25 times, every test in the world has been run on it, and no one can figure it out.

Why did my C-15 twin turbo engine go bad?

Had an ecm go bad on our 2005 C-15 Twin turbo, cost was about $2100 to replace at dealer and take a look at fuel line that runs behind ECM they will rub computer from vibration and chafe the line and leak, Put some insulation on it after repair.

What is the serial number for a 6nz engine?

It is a serial number prefix that cat used to identify a series of engines, the 6NZ is the last good single turbo C15, anything after that and your looking at probems created by updated programming and changes in parts used to meet emmissions.

Which is the last good single turbo C15 engine?

dieselpowerrules Thanks this. Hillsboro, OH./ Adrian, MI It is a serial number prefix that cat used to identify a series of engines, the 6NZ is the last good single turbo C15, anything after that and your looking at probems created by updated programming and changes in parts used to meet emmissions.

Why does my C15 Cat truck not start?

Check valve would be the likely cause for the “won’t start after a day or so” but shouldn’t account for the “starts, runs for a minute or so then quits” and does this twice back to back. All the valves do is hold pressure/ prime when it’s not running.

Is the 6nz part of the 3406 family?

And the E models were part of the 3406 family correct? The 6NZ is basically a 3406E with some minor upgrades. The electronic are different to allow the engine to communicate with other features that could be installed as options to the truck, AutoShift tranny is one that comes to mind.

Is the C7 cat engine hard to crank?

I have the same problem– 2007 Phaeton Cat C7 hard to crank. I noticed when I fill up and park in storage building, I have fuel on floor under the tank.

If you read your manual the c-15 should be idled at 1000 rpm if has to sit longer than 5 min. I have seen this before on a few Mack trucks in Australia.

What does it mean when car is running hot but not overheating?

Normally, the gauge shows the average temperature, which means it is not too hot or too cold. This means everything works fine until you see that gauge to be running hot. The gauge running hot indicates that the engine is excessively hot that it can breakdown.

What causes a C-15 cat engine to spin faster?

Downshift until you are pulling under 20 PSI on the manifold pressure and have your RPMs over 1600, this will cause the fan to spin faster and cool better. As for your fuel mileage, that is very common for an ACERT. Sounds like a typical ACERT to me.

Where to find air in a cat C15 engine?

If air is entering system, the air will be seen with a site glass at the pump inlet (hook up to a “known good fuel source” if you question it). Air might also be found on the return line to the tank, but be careful as some bubbles in the fuel is normal.

What causes CAT C-15 engine to shut down?

Trying to diagnosis cat c-15 engine shut down problem. Power plant is installed in 2001 Kenworth w900, engine performs fine will flash engine light then shut down. Have checked system for fault codes with no codes registered.

When did cat C15 engine shut down in Kenworth?

Power plant is installed in 2001 Kenworth w900, engine performs fine will flash engine light then shut down. Have checked system for fault codes with no codes registered. Truck has been taken to local Kenworth dealer and Cat Power Systems shop, everyone throws parts at it but no one has come close to solving problem.

When did the Caterpillar C15 engine come out?

Caterpillar C15 Following the production of the 3406E, Caterpillar released the C15 in 1999. This engine is very popular because of its reliability and versatility. It’s so versatile in fact, that Cat lists over 34 applications that are powered by this engine.

How much power does a C-15 cat engine have?

No disrespect but chances are this guy does not own an Acert! They are made to be lugged, all the way down to 1100 rpm. It’s not the same as an “E” or the first C15’s (6nz) there is absolutely no power above 1500 and running one there will do nothing but burn fuel.

What was the problem with my 2006 Freightliner C15 engine?

Hi I just had my 2006 freightliner with the c15 with only 484000 km into the shop about 6 times in the last 2 months, dam neer every part of the cooling system was replaced.

When did Caterpillar stop making the C15 engine?

Caterpillar first started manufacturing the C15 in 1999, and didn’t stop making it until 2007. Keep in mind that this article is about the single-turbo C15s, and not the ACERTs (though look out for that one in the future!). The C15s, especially the early ones, are known to be good and reliable engines.

Are there any problems with the cat C15 engine?

After changinging fuel filters with no result we put it in shop and found #1 and #2 injectors bad.

What kind of fuel filter does a C-15 use?

We found out the hard way, the C-15 engine has to use CAT fuel filters. The other filters starve the engine. I know it sounds bizarre, but, thats what we had to do to get rid of a horrible vibration. It only took eight times and Lemon Law to get the problem fixed. Good Luck

What should I know about the CAT C-15 engine?

The Cat C15, C-15, and 3406 Engines. Know Your Engine. Facts, Faults, and Features. If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

When to change the thermostat on a cat engine?

If it’s running below 185 degrees F, change your thermostats. (Cat engines usually have two or four thermostats per engine. If one fails, change all of them.)

Why does caterpillar use cold start fuel injection?

This is because fuel injection timing is controlled by software rather than mechanical devices. All Cat electronic engines feature a Cold Start Strategy that is activated when the coolant temperature falls below a certain point.

What is the cold start strategy on a cat engine?

All Cat electronic engines feature a Cold Start Strategy that is activated when the coolant temperature falls below a certain point. This strategy can advance the fuel injection timing even when the rpm is low, or make the engine run on a portion of the cylinders until the engine is warm.

Why is my cat C15 engine running rough?