99 forester 2.5 a/t 157,000mi + mpg is 21, sluggish at take off , i have not cleaned it yet, new air filters, cleaned intake, new fuel filter,

It may be the MAF. Does the car ever die while driving? But immediately start back up?

 

That's what happened on my car when the MAF died.

 

Does the AT transmission shift thru the gears properly - No delays? Have you checked the tranny fluid recently?

 

GL,

Td

Edited July 15, 201015 yr by wtdash

Check all vacuum hoses for splits, cracks, loose connection. How old are the plugs and wires?

 

Doesn't sound like the MAF but it won't hurt to spray it down with some MAF cleaner.

 

I'm thinking more like HEGO or ECT sensor, but some more details may help narrow it down. What's the engine temp when this happens? Outside temp? Humidity? Does it do it all the time or just every now and then? Any check engine light? If not have you verified that the CEL turns on during the bulb test?

no cel, no stalls, just at 65-70 mpr , not sure how old wires plugs are, temp gauge in the middle, very hot humidity very hi ,shifts fine all gears, new hg , valve job, also mpg is only 21 mpg, a/t , could it be a coil pk going bad, ?coolant temp

Edited July 16, 201015 yr by 86subaru

Check your VIN w/a dealer to see if yours was fixed on a MAF recall. If not, take it in to see if they'll cover it. More INFO.

 

GL,

Td

thanks

can i use seafoam spray to clean it or maf cleaner,

You should use MAF or Electronics cleaner. Seafoam will leave oil residue which will make it read incorrectly.

right , thanks,