I have a 2005 single turbo cat engin and I can’t get boost past 25psi. Going up hill truck has no power.
I have check air to air and all clamps cannot seem to figure it out.
Cat single turbo boost issue
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by united972, Aug 25, 2019.
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25-28 psi is normal range for any single turbo cat. Unless you upgrade your turbo or pinch off wastegate.
either way remove pipe frrom turbo discharge to cac. Buy 4" pvc fittings and air fitting to thread in at home depot. USe your cac boot to hold pvc in place. Add about 10psi to the ssystem and spray everything down with soapy water. Cacs like to crack at the elbows and also the edge of the fins. spray around intake elbow at motor too. spray everywhere forced air is going.
Also, check operation of waste gate with compressed air.
If all this checks out, your gonna have to check fuel psi while truck is under load -
What did you do to single turbo it, that engine was originally an acert with compound chargers.
dustinbrock, A5¢ and pushbroom Thank this. -
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A5¢, pushbroom and dustinbrock Thank this.
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Good question SmokinCAT. You cannot diagnose an issue without knowing which engine it is.
dustinbrock Thanks this. -
stillwurkin Thanks this.
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Oh.
pushbroom, dustinbrock, spsauerland and 1 other person Thank this. -
You talk about starting with the basics, well it seems in this case that the basics would be to ask how his conversion was done then go from there.... if you have owned any cat (as you said) you would know this.spsauerland, pushbroom, Diesel Dave and 2 others Thank this. -
So now that we got that out of the way, can you give us some more information about the engine, so someone can help you with your problem, unitertransport972? You may not have an air leak at all, as there are many things that are easier to check. Additional information about any work that has been done recently would be great to know.
spsauerland Thanks this.
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