1998 Plymouth Voyager Fuel Injection System Service

ELLBEE

MEMBER
1998 PLYMOUTH VOYAGER
6 CYL
2WD
AUTOMATIC
104,560 MILES

A few days ago, I had a fuel injection system service performed on my vehicle. It was recommended by the dealership due to the condition of the throttle body and the overall mileage. After picking up the vehicle, I immediately noticed that the fuel consumption has greatly increased. Where I use to get about 20 m. Pg, now I'm getting only 13 m.P.G. I've read that sometimes, during the cleaning process, damage can be caused to various components, such as the fuel pump, fuel ines, injectors, seals, spray heads, and/or O2 sensors. Is this true, and could you explain what could have happened to cause such a significant reduction in gas mileage?

1 Reply

JAMES W.

MECHANIC
2,395 POSTS

I guess I'm not a fair person to respond to you but, I will anyway. I was in the auto repair business long before production fuel injection ever came out in 1980. Back then, periodic cleaning was recommended and all shops we doing it. As time went on and systems improved, most shops discovered that solvent cleaning of the injector system was causing more problems than it solved. Most shops "quit" recommending it. Now a days, most shops and dealerships who still do it are just looking for a quick buck. I have "never" seen a case where performance was significantly improved but, many like yours.
One of 2 things have possibly happened. 1- the product they used for cleaning may have damaged the seats in your injectors, or 2-, and most prevalent, what ever deposits that may have been in your fuel sustem were disslodged and now are stuck in your injectors. This situation may improve after some driving. Only time will tell. Hope this helps in some small way.