1993 Toyota Corolla bad gass or EGR???

1993 TOYOTA COROLLA
303,500 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
INKFRK58
  • MEMBER
  • 1 POST
Last night I filled up my tank and now this morning my car is sputtering and shaking when I come from a stop. As I got onto the freeway the car kinda smoothed out but it still sputtered and shook. Can it just be bad gas, an EGR valve or something else
Jan 26, 2010 at 2:03 PM
Advertisement
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Engine running rough or misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Jan 27, 2010 at 3:30 AM
Avatar
MMPRINCE4000
  • CAR REPAIR CONTRIBUTOR
  • 8,548 POSTS
Good advice by Raz, but I would go with the bad gas option, since you say it started after a fill up.

Use Heet or some other alcohol based additive to purge any possible water from fuel system.
Jan 27, 2010 at 7:31 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.