I work for a university where students are often approved for a Sallie Mae loan, but usually only for a small amount (less than $2,000). When the amount gets higher, then factors like income and the length of your credit history will matter more.
Getting Started. Fouled, damaged, or worn out spark plugs can lead to a variety of engine problems, such as misfires, hard starts, increased emissions, and poor fuel economy. For most vehicles, you should replace your spark plugs every 30,000 miles (consult your owner's manual for your specific interval). It is also recommended that you replace your spark plugs wires at the same time, or you may still experience misfires or other problems.
After the spark plugs have been in the engine for a while, carbon deposits form around the spark plug tube, between the spark plug and the cylinder head. The carbon causes the lower half of the spark-plug shell to stick in the head and separate from the upper shell when the spark plug is turned for removal.he towing was $110.50, the eight new spark plugs cost $104.72, and the Ford dealer charged $323.68 for broken-plug removal labor. The grand total was $538.90, a high price to pay for a spark plug change.