Timing belt replacement?

Tiny
RFTLTS
  • MEMBER
  • 1992 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 138,000 MILES
92 corolla 4 cyl auto. Just quit running and won't restart. Has spark, about 45? Degrees advanced. Not the 8 it is supposed to be. Getting the EFI signal to the injectors. Fuel pump runs then shuts off. Had 2-4 and 1-2 trouble codes. The IAT sensor checked good and N2 signal is present at the test location. Replaced computer with used one. The codes cleared and still won't start. Any thoughts
Tuesday, August 2nd, 2011 AT 9:17 PM

8 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Are the sparks bright blue and constant while cranking?
What are the cylinder compression pressures?
Check the timing belt for jumped timing if ignition timing is advanved by too much.
Does using starting fluid changes anything?
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Tuesday, August 2nd, 2011 AT 10:07 PM
Tiny
RFTLTS
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  • 6 POSTS
Spark is white and good.
No gauge but spins w/out plugs and surges with plugs in.
Not checked yet.
Won't run on starting fluid.
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Tuesday, August 2nd, 2011 AT 10:32 PM
Tiny
RFTLTS
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  • 6 POSTS
How easy is it to red the marks to check the timing?
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Tuesday, August 2nd, 2011 AT 10:42 PM
Tiny
RFTLTS
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  • 6 POSTS
Took the valve cover off. Took upper Timing Belt cover off. Now just need to know how read the marks.
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Tuesday, August 2nd, 2011 AT 10:58 PM
Tiny
RFTLTS
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  • 6 POSTS
Book says to find a "K" stamp on the upper sheeve. But we can't see one.
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Tuesday, August 2nd, 2011 AT 11:14 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
The diagrams shows the timing marks.

Since you have not removed the lower cover and pulley, turn the crankshaft till it is at TDC whereby the timing mark on pulley aligns with the 0 (TDC) moark on the pulley cover.

If the valve overlap is at cyliner 4, check the cambelt timing as shown in diagram. There is a small hole which aligns with a mark on the cylinder head behind it, not easy to see.
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Wednesday, August 3rd, 2011 AT 11:33 AM
Tiny
RFTLTS
  • MEMBER
  • 6 POSTS
Broke my foot and am having trouble working on car. How common is timing belt jumping?
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Thursday, August 11th, 2011 AT 5:33 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
It seldom occurs but would if the tension is loose.

In your other post you mentioned no sparks at the moment. Seems it is getting complicated.
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Friday, August 12th, 2011 AT 12:14 AM

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