what would cause my car to have alot of loping during idling and while driving on 1995 Buick Regal

while the car is in idle {warm up} its like it wants to stall. while driving at about 35 and higher i get he same problem loping or arratic idle. whats up check all the vacuum hoses but haven't changed the plugs or wires yet i used some dry gas treatment thimking maybe its my fuel injectors what do you think the nest step shoukd be,

by in Chicopee, MA on September 08, 2011
3 answers 3 comments
ANSWER by , September 08, 2011
I'm guessing it's your timing belt or the belt on the alternator. Needs a tune up.
COMMENT by , September 09, 2011
I don't believe there is a timming belt on this car. i've been trying the highest grade gas fot the last month hoping that might help. but it getting costly,
ANSWER by , September 08, 2011
There's no timing belt and it could be many things. Do you have a check engine light on?
COMMENT by , September 09, 2011
No! I do not have a check engine light on. it would be nice if i did, that way i would look up a code.
COMMENT by , September 09, 2011
Just because the light is not on doesn't mean that it has no codes. Get it scanned by a real scanner.
ANSWER by , September 11, 2011
egr valve proble has carbon stuck in it put on computer to test