Injecting "mechanic-in-a-can" through a vacuum hose will bypass the injectors. If you really think you're going to solve an intermittent problem with a chemical, you have to inject it into the fuel rail and it has to be under higher pressure than the fuel.

These detergents are more for maintenance but if you use a good quality gasoline, they already have those additives in them. I have never needed to add anything to my '88 Grand Caravan and it's still running fine after 380,000 miles.

Answered by caradiodoc (expert)
17,654 answers provided

IS THE PROBLEM YOU ARE HAVING A "QUICK, REPETITIVE STUTTER". MAYBE AS YOU GET UNDER LOAD AND APPLY THROTTLE....PULLING A SLIGHT INLINE MAKES IT DO IT THE MOST?.....IN THE BEGINNING IT LASTED LESS THAN 2 SECONDS, WHEN IT OCCURRED

NO CODES?

WIFEYS '03 ESCAPE 3.0L DID THIS, TOOK AWHILE BUT I FINALLY GOT IT FIGGERED OUT

LET ME KNOW WHAT'S GOING ON

THE MEDIC

Answered by CJ MEDEVAC (expert)
6,881 answers provided