EGR - Hesitation During Engine Warm Up: Overview
87toyota02REFERENCE ENGINE
NUMBER 030
DATE 02-27-87
MODEL AE (FF) A/T 1985-1987
TITLE 4A-LC ENGINE HESITATION (AUTOMATIC TRANSMISSION ONLY)
For vehicles with manual transmission see Bulletin 018 Engine Volume VIII.
These procedures should only be used for complaints of hesitation DURING ENGINE WARM-UP. It is not intended for cold start or warm engine driveability improvements.
To reduce engine hesitation on light acceleration from a stop or at low speeds, a 0.9 mm restrictor has been inserted into the "R" port vacuum line of the EGR system, and the distributor advance characteristics have been changed.
PRODUCTION EFFECTIVE:
From Engine No. Production Date
4A -0690330 March, 1986
-3134205 March, 1986
-6657014 March, 1986
PART NUMBER INFORMATION:
Previous Part Number New Part Number Part Name
* --- 90925-04034 Restrictor
**19030-16081 19030-16082 Distributor Assy
* For replacement parts only ** Parts are not interchangeable