View Full Version : 91 subaru legacy Help!

10-18-2011, 02:00 PM
i have a 91 Subaru legacy i know you probably heard this about a million times. but i am having problems with the engine jerking when i get up between 20-30 speed. its alittle embarrassing trying to get up to speed. i know its not the transmission cause i took it in to a mechanic they said they couldn't find anything wrong if you have any suggestions please let me know. thanks.

10-18-2011, 09:50 PM
Do you have a CEL[check engine light]?

Does the jerking only happen between 20-30mph?

10-19-2011, 10:58 AM
well the check engine light doesnt come on until it jerks alot.
yes it only happens between 20-30 mph.

10-20-2011, 02:59 AM
Do you know the condition of the spark plugs?

If not, pull them out and inspect the gap for erosion, fouling, and overheating.

Next, I would check the throttle possition sensor...

,,,then the A/F sensor[s].

10-20-2011, 01:29 PM
i just replaced the spark plugs not too long ago. havent check the throttle positon senor or A/F sensor but i will check it and see if it cures the problem thank you soo much for your help!