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turbo issues

700 Views 6 Replies 5 Participants Last post by  99cummins310
My friend has a 99 2500 5 speed 2wd extended cab longbed and called the other day saying that in 5th gear he was running 2200 rpms at 65 mph when normally he would be at 75. He said his truck was louder than usual and he couldnt hear his turbo like he normally could and didnt seem to have as much power.

He said he could down shift and then it would spool but cruising it wouldnt spool like normal.

I told him to check shaft play and look for leaks in the boots.

Any other ideas why this would be going on?
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If it is running a different RPM at a given speed than normal then the clutch is slipping.

You cannot have a different Speed at the same RPM in the same gear without something slipping. Just not possible.

either your friend has his facts mixed up or his clutch is toast.
Without gauges and actual information as to what is happening there is no way we can really offer any legitimate advice.

you can easily check the turbo for play by pulling the intake boot off and checking for play, in and out, and up and down.

Make sure the blades spin freely.

Beyond that do the basic's
1. Scan for codes
2. Check for boost leaks
3. Check fuel pressure
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