No Turbo Spool on 99 F250 7.3 PSD - Ford Powerstroke Diesel Forum
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Old 01-31-2014, 05:11 PM
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No Turbo Spool on 99 F250 7.3 PSD

Ok guys, have major issue with my 99 F250 7.3 PSD. Truck has just over 200,000 miles. There is no distinctive whistle/turbo spool and it seems to lag at high RPM's. When I mash the pedal there is no whistle nor a substantial power increase. There is no smoke coming from the tail pipe. I have pulled the cold side inlet tube and there are small traces of oil residue, but nothing major. The same was discovered in the Y-Pipe. Additionally there is no play in the cold side turbo shaft. All the connections seemed to be in place and on tightly. Lastly, no codes are present.

I am currently in the process of pulling the turbo, but wondering if I am being premature in that latter action.

That being said, I have four questions.

1. Is removing the turbo the correct action to take?

2. What would cause my latter issue and what would be the fix?

3. Would be mechanical or electrical?

4. Can someone recommend a reputable diesel shop in/near Clarksville, TN?

The truck is a daily driver and need to get this issue resolved ASAP.

Thanks for the help, I appreciate it.
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Old 02-01-2014, 06:16 AM
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The First thing I would do would be to look for "Leaks" in the Turbo plumbing that can either rob you boost the turbo is making (IC boots etc) or prevent the Turbo from getting enough exhaust to make proper boost (Up Pipes leaking). This all assumes your Filter & Exhaust aren't "plugged" in some way.

The Up Pipe leaks are easy to check. Take a Flashlight and look behind the Turbo, at the connections there, for Soot from a leak. On the Pipes and Firewall it should be evident (works better in the evening so sunlight doesn't interfere).

To properly test the IC system is more complicated because there's no trace, like soot, at a leak site. You can make the tools to pressurize it all with PVC caps yourself or, examine all the boots by removing them. Because the Crankcase fumes, and OIL, are pumped into the turbo all the boots become contaminated with oil. These joints eventually become lubed and can push-off. Removing, cleaning, and tightening them ALL could be all it takes.
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