Incorrect octane will neither cause the check engine light to come on nor cause it to start hard. If anything lower octane would start easier. I'm not sure (without looking it up) but I think that the '95 may be OBDII diagnostics and currently there are a possible 1,999 possible codes available (even though no manufacturer uses all the options.) My point is there is many things that can turn the light on. Do a search here for how to check for problem codes or stop at an Autozone or similar parts store - many do diagnostic checks for free.
__________________
ASE Certified Master Automotive Technician w/L1.
ASE Certified Master Medium/Heavy Truck Technician.
Certified EVT (Emergency Vehicle Technician)
|