Why won't my 2007–2008 Ford F-350 start or crank?

Short answer: First tell crank-no-start from no-crank. A 6.0L Power Stroke that cranks but won't fire after sitting needs enough voltage from the fuel injection control module (FICM) and enough high-pressure oil to fire the injectors. Members also said old oil can cause trouble, so have both checked. If it makes no sound at all, test both batteries first. A member said 12.4 volts is a dead battery on a diesel, and 12.6 is full. Then check the starter relay, the fuses and the starter.

Symptom: A truck that sat for months cranks but won't fire, then starts once and fails again. Or the dash lights go out when you turn the key to Start and nothing happens: no click, no crank.

What to check first

1. Load-test both batteries. They should read about 12.6 volts at rest. Diesels need strong batteries to crank and power the injectors.
2. Note whether it cranks. No sound points to batteries, cables, the starter relay or the starter.
3. Check the starter relay and fuses in the under-hood box and under the dash.
4. On the 6.0 diesel, have FICM voltage and high-pressure oil (ICP) checked. A shop scan tool reads both.
5. Change old oil and fuel filters on a truck that sat a long time.

Likely causes

1. Weak or dead batteries. Both batteries in the 2008 truck read 12.4 volts, which a member called dead.
2. Failing starter. The 2007 truck's starter gave out right after it first started, and the owner said that was the main problem.
3. FICM low voltage (6.0L). A member said this is a big cause of no-starts on 6.0 trucks and that FICM solder joints can fail with heat.
4. Low high-pressure oil to the injectors (6.0L). These injectors fire with oil pressure, so old oil or a leak can stop them.
5. Starter relay or fuse. Suggested for the 2008 no-crank.

What it usually costs

No owner posted prices in these threads. Batteries and a starter are moderate parts. FICM and high-pressure oil repairs on the 6.0 can be expensive, so get a proper diagnosis first.

Is it safe to keep driving?

A truck that won't start isn't a driving hazard, but a 6.0 that runs rough or keeps failing to start should be scanned before you count on it for work or towing. Verify with a mechanic.

DIY or shop?

DIY for batteries, fuses, relays and the starter. FICM and injection pressure testing need a diesel-savvy shop and a scan tool.

Recalls, bulletins and complaints in plain words

• Related recalls: NHTSA lists these recalls touching this area of the Ford F-350 Super Duty: 07V140000 (2008-2008 model years, electrical system). Check your VIN at nhtsa.gov/recalls. If your car is part of this recall, the dealer fixes it for free.
• Plain words: Recall 07V140000 covered some 2008 trucks with the 6.4L diesel whose main battery positive cable could rub against a splash shield bolt. A damaged cable can cause electrical trouble, so have it checked if yours is a 2008 6.4. If your truck is part of this recall, the dealer fixes it for free. Verify with a mechanic.
• NHTSA complaints: 41 keyword-matched complaints for Ford F-350 Super Duty 2007–2008 (of 294 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-27; keywords: no start, no crank, click, starter, ignition switch, stall, dies, FICM, injector, glow, battery, no power) (NHTSA returned no complaint data for 1 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Ford F350 Not Starting on Car Talk, a 2007 F-350 with the 6.0 Power Stroke had sat for five or six months and wouldn't start even after new oil and fuel filters and a diesel mechanic's visit. Members said the big no-start causes on this engine are low FICM voltage and not enough high-pressure oil to fire the injectors, and that old oil can cause trouble. It eventually started, and then the starter failed right away. After that it ran reliably, and the owner said the starter was the real issue.
• In 2008 Ford F-350 won't start on Car Talk, a 2008 F-350 made no sound at all when the key was turned, and the dash lights went out in Start. It didn't start in Neutral either. Both batteries read 12.4 volts, which members said is actually dead. They also pointed to the starter relay and fuses. The owner replaced both batteries and tried rapping the starter, and no final fix was posted.

Quick tip

On a diesel, test the batteries with a load tester, not a meter. Two tired batteries can look fine and still not crank the engine.

Vehicle focus: 2007–2008 Ford F-350 Super Duty, gas and diesel (6.0L and 6.4L Power Stroke).

Safety / mechanic note

Diesel injection systems run at very high pressure. Don't open lines on a running engine, and disconnect both batteries before starter work. Verify with a mechanic.