Hard to start - 2000 Toyota Corolla

Question: Hard to start

Question

RLF2000, Sainte Genevieve, MO, April 05, 2009, 11:48

Rookie

My Corolla has only one problem.
It does not like to start, usally takes
2-3 tries. I just put new plugs in it,
the expensive recommened kind. Still
it doesn't start right.

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Answer #1

patrick mannion from Greg Solow's Engine Room, April 05, 2009, 12:52

Master

Older Toyotas had a cold start injector that enriched the fuel mixture from a cold start. Your engine relies on the coolant temperature switch input to richen the mixture on cold start. The quickest way to verify its operation is using the 16 pin diagnostic socket under the drivers side of the dash. A Scantool will directly read the temperature without intrusively having to test the sensor itself.
The other likely cause is a fuel pressure regulator bleeding off fuel pressure causing a drop in fuel pressure or delivery at the fuel rail, to check this a fuel pressure gauge has to fitted in the fuel rail.
Does the car attempt to start and stall or just not start? How does the car idle immediately after it starts? The reason I ask is perhaps there is a vacuum leak or idle air control valve can cause a weak mixture allowing too much air if it sticks open.

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2000 Toyota Corolla

Question: Hard to start

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