MX-6 L4-2184cc 2.2L SOHC Turbo F2 (1989)
Fluid Pump: Customer Interest
A/T - 2nd to 3rd Gear Splippage or Flare Up
Category K
Applicable Model/s 1988-90 626/MX-6 incl. Turbo
Subject EC-AT SLIPPAGE IN FORWARD GEARS
Bulletin No.
005/90
Issued
5/14/90
Revised
DESCRIPTION
If you encounter a complaint about 2-3 gear slippage or flare-up, it may be caused by improper function of the oil pump. Please check and repair this
problem according to the procedure described in this bulletin. At the mass-production line, the oil pump has been modified since the date indicated under
VIN of Production Change.
CHECKING & REPAIR PROCEDURES
1.
Warm up the engine to normal operating temperature.
2.
Check the line pressure in "P" range at idle. Adjust it if necessary.
Specification:
4.4-4.6 kg/sq. cm. (63-66 psi)
3.
Perform the following tests while the engine speed is kept at 2,000 rpm in "Park."
A.
Pull the throttle cable to the end of its travel (full throttle) and read the line pressure. Line pressure should be higher than 8.0 kg/sq. cm.
(115 psi).
B.
Next, quickly and smoothly pull the throttle cable out to one-half way of its travel (half throttle) and hold. Check for line pressure spike
(maximum) and drop (minimum) readings using a line pressure gauge.
^
A good oil pump should show a smooth increase of pressure and level off at a stable pressure.
^
If the spool valve of the oil pump is stuck, it may cause a pressure spike and variation in pressure before leveling off, or it may
show little/no increase in pressure. (Refer to the illustrations.)
4.
If a problem is found in Step 3, replace the oil pump spool valve according to the Replacement Procedure.
5.
Recheck the line pressure according to Step 2 and perform the road test to confirm that the problem is fixed.
