Power Stroke Diesel Guide
From the legendary 7.3 to the modern 6.7.
Ford's Power Stroke diesels span a dramatic range — from the bulletproof, pre-emissions 7.3L that a generation trusts blindly, through the troubled outsourced 6.0L and 6.4L era, to the strong in-house 6.7L 'Scorpion' that restored the line's reputation.
That history matters when buying: a 7.3 is simple and durable, a 6.0 is a great truck only once it's been sorted, and the modern 6.7 is reliable and very capable when serviced — with fuel-system protection the main thing to stay ahead of.
The 7.3 legend
Lightly stressed and emissions-free, the 1994.5–2003 7.3 routinely runs 300,000–400,000+ miles. Weak spots are cheap: the cam sensor (CPS), HPOP/IPR, and glow plugs.
6.0 / 6.4 caution
The outsourced 6.0 is a gamble un-sorted, but a 'bulletproofed' one (oil/EGR coolers, ARP head studs, FICM) is genuinely reliable and cheap to buy.
The modern 6.7
Ford's in-house 6.7 is a big step up — strong, capable, and reliable when serviced. The headline concern is CP4 fuel-pump protection on the years that used it.
Tuning needs studs
The factory head bolts can lift gaskets under big boost; ARP head studs are the durable fix for a high-power Power Stroke build.
Power Stroke guides
Common Power Stroke trouble codes
Power Stroke — frequently asked questions
Which Power Stroke is the most reliable?
The 7.3 has the most bulletproof reputation thanks to its simplicity and lack of emissions hardware. The modern 6.7 is also very reliable when serviced; the 6.0/6.4 need to be sorted first.
What years of Power Stroke should I avoid?
The outsourced 6.0 (2003–2007) and 6.4 are the cautionary ones — strong once 'bulletproofed,' risky if not. The 7.3 and the in-house 6.7 are the safe bets.
What is the CP4 problem on the 6.7 Power Stroke?
Early 6.7s use a Bosch CP4 pump that, if it fails, can send metal debris through the whole fuel system. Clean fuel, on-time filters, and a protection device reduce the risk.
Got a Power Stroke? Talk to a specialist.
Get a technician who knows the Power Stroke on the line — they'll interpret your symptoms and codes in context before you buy parts.
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