Two of the most common “truck won’t go” calls have nothing to do with a broken part: the batteries are dead, or the tanks are empty.
Both sound simple and are frustrating in real life. A heavy diesel needs serious cranking power to turn over, and a passing pickup with jumper cables usually won’t cut it. An engine that ran out of diesel often won’t restart with fuel alone, because air got pulled into the lines and filters.
Around the harbor, dead batteries follow a weekly rhythm: Monday morning, in a yard, on a truck that sat since Friday in damp coastal air with a battery bank that was already marginal. Long idles in gate queues with the key on, an inverter running, or accessories drawing power will finish off a weak bank the same way. Running out of fuel happens less here than on long-haul routes, but it does happen — usually to a truck that spent far more of its shift idling than the driver expected.
What our Jump Start & Fuel Delivery covers
- Jump starts sized for heavy diesel engines and multi-battery banks
- Battery load testing to find out whether the batteries will hold a charge
- Battery replacement when one bad battery is dragging down the rest of the bank
- Cleaning and tightening corroded or loose battery terminals and cables
- Checking alternator output so the truck doesn’t die again down the road
- Looking for parasitic drains — inverters, aftermarket accessories, and chafed wires
- Diesel fuel delivered to the truck to get you to the next fuel stop
- Priming the fuel system and bleeding air after running out of fuel
- Fuel filter changes when running the tank low pulled sediment into the filters
- DEF delivery when the truck derated for low DEF level
When a jump or fuel isn’t the fix
Sometimes a no-start turns out to be something else. A jump won’t help a failed starter, a stuck solenoid, or a broken cable, and fuel won’t help if a lift pump has failed or a filter is plugged. When a jump start or fuel doesn’t do it, the mechanic moves on to diagnosis — see electrical & charging repair and fuel system repair.
Roadside fuel delivery is meant to get the truck to a fuel stop, not to fill the tanks. Ask dispatch about quantity when you call, then fuel up normally once you’re moving again.
Fix it on site or tow it?
Neither dead batteries nor an empty tank should ever need a tow. They only turn into a bigger job when there’s an underlying failure — a charging system that isn’t charging, or a fuel system problem — and even then, most of that work can happen on site.
One warning: if the engine ran out of fuel, don’t keep cranking it for minutes at a time. Long cranking overheats the starter and drains what’s left of the batteries, turning a fuel problem into a fuel and starter problem.
What to tell dispatch when you call
The more dispatch knows up front, the better the odds the mechanic shows up with the right parts and tools on the first trip.
- Whether the problem is dead batteries, no fuel, or you’re not sure
- For batteries: what was running while the truck sat, and for how long
- For fuel: whether you ran completely dry and whether you’ve tried to restart
- Engine make, if you know it
- Exact location, and whether the truck is in a travel lane
Truck makes & engines we work on
- Freightliner
- Peterbilt
- Kenworth
- Volvo
- Mack
- International
- Western Star
Class 6 through Class 8 trucks, including engines from Cummins, Detroit Diesel, PACCAR, Volvo, Mack, Navistar, and Caterpillar.
Jump Start & Fuel Delivery around the harbor & the South Bay
Jump starts are common in container yards, chassis depots, warehouse lots, and gate queues — anywhere a truck sits for a while, which in this market is most places. Fuel delivery calls come from the yards and from Terminal Island, where there is no fuel stop at all and a truck that misjudged its day has no way to solve the problem itself.
Freeways
Service areas
Jump Start & Fuel Delivery FAQ
Can’t I just jump a semi with a pickup truck?
Usually not. A diesel truck with a multi-battery bank needs far more cranking power than a pickup can supply, and trying can damage the smaller vehicle’s electrical system.
Why won’t my truck start after I put fuel in it?
When a diesel runs dry, air gets pulled into the fuel lines and filters. The system has to be primed and the air bled out before the engine will restart.
How do I know if I need new batteries?
A load test tells you. Batteries can show normal voltage and still fail under load, and one bad battery in a bank can drag the others down with it.
How much fuel do you bring?
Enough to get the truck to a fuel stop. Ask dispatch about quantity when you call.
My truck derated from low DEF. Can you help?
Yes. Most trucks derate when DEF runs low. Adding DEF usually clears the derate once the system rechecks the level, though some trucks need a key cycle or a short wait.
Is a dead battery in the summer normal?
Heat is one of the main causes of battery failure, and long idling, sleeper A/C, and inverters add to the load. If batteries keep dying, have the charging system and parasitic draw checked.