Fuel Quality

Poor gasoline quality will contribute to poor starting and/or running. See S.I. 13 01 88 (1564) concerning Gasoline Fuel Quallity Recommendations.

In the Spring and Fall, when gas stations switch from Winter to Summer fuel, respectively from Summer to Winter, the different Reid vapor pressures can have a significant influence on starting abilities.

This is even more complicated by the fact that depending on the geographical area and the local fuel distributor, those seasonal fuels are not available at the same time everywhere.

Note: When long cranking complaints occur for the first time, in particular during the changing of the seasons, it can be assumed with a high degree of probability that the fuel is the cause. Customers should be advised to fill the tanks of their cars with a different brand of high quality fuel.

Important only after the elimination of all possible causes for a poor starting and/or running condition should the injectors be removed and tested as per the following instructions.