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1993 Toyota Corolla bad gass or EGR?

Tiny
INKFRK58
  • MEMBER
  • 1993 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 303,500 MILES
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
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Tuesday, January 26th, 2010 AT 2:03 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Wednesday, January 27th, 2010 AT 3:30 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 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.
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Wednesday, January 27th, 2010 AT 7:31 AM

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