Mazda MX-5 1990 Workshop Manual page 478

Q
OUTLINE, TROUBLESHOOTING GUIDE
OUTLINE
SPECIFICATIONS
Item
Type
Standard Temporary spare
Size 14 x 5 1/2-JJ 14 x 4T
Offset mm (in) 45 (1.77)
Wheels
Pitch circle diameter mm (in) 100 (3.94)
Material Aluminum Alloy Steel
Size
185/60R14 82H T115/70014
Tires
Air pressure kPa (kgflcm
2
,
psi) 177 (1.8, 26) 412 (4.2, 60)
05UOQX-002
TROUBLESHOOTING GUIDE
Problem Possible Cause Action Page
Excessive or ir-
Refer to page
Q-
4 for details.
regular tire wear
Premature tire
Incorrect tire pressure Adjust
Q-
3
wear
Tire squeal Incorrect tire pressure
Adjust
Q-
3
Tire deterioration
Replace
-
Road noise or Insufficient tire pressure Adjust 0- 3
body vibration Unbalanced wheel(s)
Adjust Q-
5
Deformed wheel(s) or tire(s)
Repair or replace
-
Irregular tire wear
Replace
-
Shake Excessive tire and wheel runout Replace
-
(Steering wheel Loose lug nuts Tighten
Q-
4
vibrates up/down) Unbalanced wheel(s) Adjust or replace 0- 5
Cracked or worn engine mount rubber Replace
Sections B 1 ,B2
Cracked or worn transmission mount rubber Replace
Sections K1,K2
Shimmy Cracked or worn steering gear mount rubber Replace
Section N
(Steering wheel Loose steering gear mounting bolts Tighten Section N
vibrates left/right) Stuck or damaged steering ball joint Replace Section N
Excessive tire and wheel runout
Replace -
Loose lug nuts Tighten
Q-
4
Unbalanced wheel(s) Adjust or replace 0- 5
Insufficient tire pressure Adjust
0-
3
Unevenly worn tires Replace
-
Malfunction of shock absorber Replace Section R
Loose shock absorber mounting bolts Tighten Section R
Struck or damaged lower arm ball joint Replace Section R
Cracked or worn suspension bushings Replace Section R
Damaged or worn front wheel bearing Replace Section M
Impropery adjusted front wheel alignment Adjust
Section R
Uneven (one-sided) Unequal tire pressures Adjust
Q-
3
braking
Steering wheel Incorrect ti re pressu re Adjust 0- 3
doesn't return Irregular tire wear (left/right) Replace
-
properly or pulls Unequal tire pressures Adjust Q-
3
to either left or
Different types or brands of tires mixed (left/right)
Replace
-
right
Loose lug nuts
Tighten 0-
4
General driving Unequal tire pressures Adjust Q-
3
-.
instability Damaged or unbalanced wheel(s)
Replace or adjust 0- 5
Loose lug nuts Tighten
0-
4
Excessive steering Loose lug nuts Tighten Q-
4
wheel play
05UOQX-003
0-2