Ford 7.3L Powerstroke Excessive White Smoke

7.3 Powerstroke Excessive White Smoke

White smoke is one of the last things you want to see coming out of your engine, and it needs to be taken care of right away. White smoke after a hard start or when you’re driving down the road almost always indicates that there’s been contamination in your combustion reaction. If your engine produces excessive white smoke, it requires immediate attention to prevent permanent damage. Stay on top of your engine’s health and eliminate white smoke with products from Hot Shot’s Secret. 

Why Is My 7.3 Powerstroke Producing White Smoke? 

Several things could be causing white smoke in your 7.3 Powerstroke:

Cause: Poor fuel quality

Solution: Whether you have poor fuel quality or water in your fuel, Hot Shot’s Diesel Extreme gets the job done

Cause: Residue and stiction in the injectors

Solution: One dose of Hot Shot’s Secret Stiction Eliminator can clear out your engine and prevent stiction from building up in your injectors

Cause: Transmission leaks

Solution: Check your pan gasket for leaks and consider replacing it or taking your 7.3 Powerstroke to a mechanic

7.3 Powerstroke White Smoke Causes

White smoke can be caused by a couple of different things:

Injectors With Stiction

If your 7.3 Powerstroke produces white smoke on startup, but then the vapor dissipates when the truck gets warmed up, the white smoke is likely from unburned fuel. When your combustion temperatures aren’t high enough to completely burn off fuel, your engine becomes filled with stiction. Using one full dose of Stiction Eliminator to clean out your injectors will give your truck a boost when cold.

Water in Your Fuel

Poor fuel quality can cause water in the fuel without you realizing it. When you have poor fuel quality, water can build up in your fuel system from condensation. When your engine is starting up, this water can cause your engine to emit white smoke. If the “water in fuel” light is on or you suspect that there’s water in your fuel, use Diesel Extreme to clear out the system and then change your fuel filter.

Transmission Leaks

White smoke may be the sign of faulty diaphragm valves in your vacuum modulators. This leads to transmission fluid entering your engine’s intake system through the vacuum hose line and messing up your automatic transmission system. Aside from white smoke, you can identify a transmission fluid problem if you have problems shifting or smell a sharp, pungent odor. If you find red fluid leaking from your vehicle instead of green, you definitely have a transmission leak. 

Blown Head Gasket

If your truck is using excessive coolant and smoking white all of the time, this can be a sign of a blown head gasket. However, this issue is not common in trucks with 7.3 Powerstroke engines. If it is coolant, the exhaust will have a sweet smell to it.

Broken Injection Timing

White smoke may also be the result of faulty injection timing. Due to their highly sensitive components, injectors are prone to cracking and becoming damaged after the truck has been driven for many miles. To protect your injectors from damage, try not to let your 7.3 Powerstroke idle for extended amounts of time. 

Hot Shot’s Secret Original Stiction Eliminator

Combat white smoke caused by stiction with our powerful Stiction Eliminator. Our formula reduces the sticky residue — or stiction — that builds up to clean and protect your injectors, rings and turbo. Our Original Stiction Eliminator’s formula works with both diesel- and gasoline-powered engines. In third-party ASTM G-133 testing, our stiction remover was proven to reduce the wear inside your engine by up to 62% more than just engine oil. Our formula also improves your 7.3 Powerstroke’s fuel economy and can fix 9 out of 10 “failing” HEUI engines. 


Hot Shot’s Secret Diesel Extreme

Our Diesel Extreme formula is an intensely concentrated cleaner that removes waxy and polymeric internal diesel injector deposits. With Diesel Extreme, you get more than an IDID cleaner — you get a cetane boost, fuel stabilizer, and lubricity additive to elevate your vehicle to maximum performance. In addition to reducing buildup and decreasing white smoke, our Diesel Extreme eliminates excessive black smoke. 

Hot Shot’s Secret designed Diesel Extreme specifically for powerful engines such as the Ford Powerstroke, GM Duramax, Dodge Cummins, and more. When you use Diesel Extreme for your 7.3 Powerstroke every 6000 miles, you can enhance your fuel economy and keep your fuel in stabilized and clean condition. 


The contents of, such as text, graphics, images, and other material contained on the Diagnose Your Diesel section are for informational purposes only. Always seek the advice of your mechanic or other qualified professional with any questions you may have regarding your vehicle’s condition.