Common causes of stall during acceleration for a fuel-injected vehicle include moisture in the distributor cap and a worsening fuel-system vacuum leak. Excess moisture in the distributor cap typically makes the problem most noticeable in the early mornings or on rainy days. Vacuum leaks tend to start out unnoticeable and develop symptoms that increase in frequency and intensity over time.
Stall during acceleration can lead to other problems over time. Moisture in the distributor cap causes the electrical signals to arc between nodes or misfire entirely. This leads to damaged leads, requiring further repair. The distributor cap should be fastened tightly, and any visible wires properly fastened and insulated. Many major manufacturers provide anti-moisture solutions that can help prevent dew from building up.
Creating a proper seal and verifying insulation can help keep moisture due to rain or thick fog from penetrating the system. Fuel-system vacuum leaks require tracking down and identifying the location of the leak. A repair or replacement is necessary for any damaged hoses or components causing the system to leak. These repairs may require the knowledge and care from an expert, so the advice and assistance of a skilled mechanic is recommended when working with fuel-system components.