Sure and stall in 98’ Forrester

[hawker]

Hi, I wonder if anyone can help?

My ’98 Forrester will start fine then run for a short period of time,
surge slightly, then drop rpm till it stalls. No amount of gas pedal
adjustment will stop the stall once the rise/drop in rpm begins. The
vehicle will start again without incident until the process repeats
itself again. The occurence of the whole cycle is intermittent, but
occuring with more frequency. The fuel filter and pump have been
inspected and pronounced serviceable.

Can anyone point my in the right direction?

Thanks

 

[Carl 1 Lucky Texan]

Hi, I wonder if anyone can help?

My ’98 Forrester will start fine then run for a short period of time,
surge slightly, then drop rpm till it stalls. No amount of gas pedal
adjustment will stop the stall once the rise/drop in rpm begins. The
vehicle will start again without incident until the process repeats
itself again. The occurence of the whole cycle is intermittent, but
occuring with more frequency. The fuel filter and pump have been
inspected and pronounced serviceable.

Can anyone point my in the right direction?

Thanks

Is the CEL (mil) light on? Can you retrieve a code to post?

There may be several things that could cause this behavior - but the MAF
sensor comes to mind.

Carl

 

[Bob Noble]

Sounds a lot like a plugged fuel filter to me.

 

[dnoyeB]

Sounds a lot like a plugged fuel filter to me.

Sounds more like the EGR Valve with the temperature sensitivity and all.


CL

 

[Dan]

Sounds more like the EGR Valve with the temperature sensitivity and all.  

CL

I had a glitch with a Ford Ranger that baffled a lot of expensive
mechanics till we figured out that the catalytic converter was
clogged. It would start and run ok enough to get about thirty five and
a half feet down the road and then it would just die. I would let it
sit for a few minutes and then it would start and do the same thing,
repeatedly. Just another possibility. Good luck to you.

 

[Stewart DIBBS]

My '98 Forrester will start fine then run for a short period of time,
surge slightly, then drop rpm till it stalls.

When this happens, slowly open the gas cap. If you hear a SHHHHHH sound,
this is air pressure equalizing a partial vacuum in the gas tank. Another
test is running the car with the gas cap off: if the problem goes away this
suggests an issue with the evaporative system.

SD