Fuel Filter light on 89 IDI

[Conn]

The fuel filter light seems to be "wanting" to come on when the throttle is crowded. It gets brighter as the RPMs and load on the engine climb. Do i have a short somewhere or is this "fuel filter" sensor related to restriction in the line and it SHOULD come on like it is...brightening and dimming.....


Thanks!

Conn

 

[towcat]

Change out filter first. If you still have a flickering light issue, the switch is starting to go bad. Its a one wire deal, so if the switch grounds out, connection is made,light goes on.

 

[budtoh3zo]

I thought i read some were that it could also be a sign of low fuel pressure?

 

[RKOCH]

Yes a failing lift pump will do that too. But change the filter first and if still does it put a lift pump on it.

 

[towcat]

These motors are pretty simple. As a result, start with the simple stuff first. PM items are a good start. No need to get ahead of yourself so fast. a weak lift pump would also show other symptoms too like power fade off at high rpms or leakdown when sitting dormant for a period of time.