I have a 1993 volvo 850 with a 5-speed manual, and for some time now i've been having se problems with the acceleration. Sometimes when i release the clutch, the car won't accelerate that fast, untill I release the gas and press it again, sometimes it accelerates fine. But today, while going up a hill, I was going 75, but on the uphill, the car started slowing down, so I down shifted to fourth, but it was still slowing down, so I down shifted to third, but I was still slowing down. I was going 45 in the freeway, and the car was still slowing down, in third gear while I was stepping on it!! Well the fuel pump is new as of November of last year, so I don't know what the problem might be, so any help would be greatly appreceated.

 

Check engine light on?

 

Nope the check engine light is not on, and I've checked for codes and got nothing

 

A2 and A6?

 

Yep I checked both and got nothing

 

Fuel filter been changed lately?

 

I think I changed it on November of 07

 

might be time to change it again...

 

I kinda figured that. But today as I was driving a long way home, I realized that my car will not go over 40 on the freeway, even though I was in 3rd gear. So after awile, I got tired of going too slow so I pulled over and after I stopped the car had a rolling idle. So I turned off the car and opened the hood, and thinking it was the maf and I dissconected it. The car ran well after that, but it stalled whenever I stoped. So I'm about 95% it's the maf, could it possibly be something else also?

 

well you know you have a maf issue.... so replace the maf and report back.

 

O any of you know were i can find a cheap brand new maf all ive seen for sale are in the 160 and above range

 

Have a similar problem. What's a "maf" ?

 

A maf is a mass air flow sensor, and if u have a similar problem, I would start by checking that sensor

 

it is plugged into the top of the air box.

 

So I changed the maf yesterday and now the car runs great and the studdering and rolling idle dissapered, that is until I turn on the AC. If the ac is on and I try to take off from a stop, sometimes the car feels like it's not going anywhere, and nomater how hard I press the gas the car whont speed up, also as I relese the clutch, sometimes the car feels a little jumpy and studders. But if I turn off the ac the car rurns fine, so now idk what the problem might be, but I'm kinda suspecting the clutch