09/25/2026
Is your diesel trying to tell you something? 🔧
These injectors just came out of a customer’s truck at our Abbotsford shop. Injectors are some of the hardest-working parts in a diesel engine. They fire fuel into the cylinder at extremely high pressure, thousands of times a minute, and they have to be precise every time. When one starts to fail, the whole engine feels it.
Signs you might have a bad injector:
• Hard starts or long cranking, especially when it’s cold
• Rough or lumpy idle
• Excess smoke (black, white, or blue)
• Loss of power or hesitation under load
• Worse fuel economy
• Knocking or ticking that wasn’t there before
• A check engine light or injector balance rate codes
• Rising oil level or a fuel smell in the oil
What causes them to fail? Contaminated fuel and water in the system are the most common culprits. Worn internal parts, carbon buildup, and plain high mileage are the others.
Why you shouldn’t wait: a leaking or stuck-open injector can wash down a cylinder wall, dilute your engine oil with fuel, or in the worst case damage a piston. A repair that starts as an injector job can turn into an engine job.
How we diagnose it: we don’t guess. We run balance rate and contribution tests and check return flow to find the exact problem before we replace anything. When injectors come out, they go back in with new copper seals, every time.
If your truck is showing any of these signs, bring it in before it gets worse.
📞 604-799-3835
🌐 dieseldoctor.ca
📍 104-663 Sumas Way, Abbotsford
🕗 Mon–Fri, 8AM–4:30PM
