Join Date: Jun 2007
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1) While towing, around 1800-2200 RPM, I'm experiencing what I believe is turbo surge. Sounds almost like the turbo is blowing off some pressure. Sounds like a cough or "whoosh" on the left side of the vehicle. Sometimes it only does it once or twice, and on occasion, it will do it repeatedly until I either accelerate or decelerate. Does this sound like turbo surge, and what's the best fix (other than avoiding that RPM range).
If this is the first time that your truck has pulled heavy weight in a long time, the turbo veins might be gunked up. It might go away , or it might need to be disassembled and cleaned. Could also be dirty EGR valve.
2) Fuel Economy! Okay, so PSDs are made for towing, but at 8.57 MPG (hand calculated)? The trip was about 115 miles one way, mostly gently sloped highway @ 60mph, the last 30 miles is windy, slow-going mountain roads. Elevation between 2025-3500 ft. Why such horrible mileage?
Is this MPG calculated round trip, or one way? Also, if you are pulling weight, up hill, on winding mountain roads, your milage will suffer, but also see below.
3) Experienced a extremely rich diesel smell in the cab when pulling uphill. The steeper the hill, the richer the smell. It can get to the point where it is almost sickening.Any ideas?
When I had this strong diesel smell, it was because the Y pipe before the turbo had cracked (fixed under warantee). The good news is that if it is pre turbo (the Y pipe) it will cause an underboost condition that will cause you to loose MPG. The bad news is that if you are out of warantee it is a pain in the neck to change out.
2003 (12/02 build) F250 6.0 4X4 Crew Cab,190,000, all original
Repaired under waranty:Y-pipe, ICP, reflash
Repaired by me: ICP, FICM, cracked degass bottle, CAC boots, rear diff seal, overhead console, Blue spring w/O-ring
Bypass oil+coolant filters, in-line PS filter. T-5 10w30 every 7,500 mi.
Guages: Boost, Pyro and Trans, ScanGaugeII