Spark's all right too, strong and hot.

However--" With a sigh of resignation Bud got out what tools he wanted and went to work.

Foster got out and stood around, offering suggestions that were too obvious to be of much use, but which Bud made it a point to follow as far as was practicable.
Foster said it must be the carburetor, and Bud went relentlessly after the carburetor.

He impressed Foster with the fact that he knew cars, and when he told Foster to get in and try her again, Foster did so with the air of having seen the end of the trouble.

At first it did seem so, for the engine started at once and worked smoothly until Bud had gathered his wrenches off the running board and was climbing it, when it slowed down and stopped, in spite of Foster's frantic efforts to keep it alive with spark and throttle.
"Good Glory!" cried Bud, looking reproachfully in at Foster.