1989 Toyota Corolla timing

POKALAY

MEMBER
1989 TOYOTA COROLLA
4 CYL
FWD
MANUAL
161,000 MILES

What is the BTDC of 5af engine? I have a problem with my engine, engine hesitate during accelaration. Carburator and distributor is newly overhauled.

Friday, July 30th, 2010 AT 4:32 AM

7 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Go 10 deg BTDC it 'll work on 4af/5af engine and double check your carb's accelerator pump if its squirting fuel when throttle is pulled back if not this will cause hesistation

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Friday, July 30th, 2010 AT 5:04 AM

MMPRINCE4000

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4AFE would be U.S. Built, 5AFE is Japanese disigination of same 4AFE engine.

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Friday, July 30th, 2010 AT 6:38 AM

POKALAY

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Saturday, July 31st, 2010 AT 9:50 AM

MMPRINCE4000

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Then it is a fuel problem or vacuum leak.

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Saturday, July 31st, 2010 AT 10:28 AM

POKALAY

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I tried 10 deg BTDC but the engine is rough but when I tried to disconnect the vacuum advancer ang plugged and set the timing to 10 deg BTDC the engine works fine but the hesitation still there when you suddenly pulled back the throttle.[/Quote:c7329b26b5]

What is the required idle up of my engine 5af with aisan 2 barrel carburetor with and withour aircon? Fast idling was set to 1400rpm. I can see my VECI under my hood.