1-42 GENERAL INFORMATION AND MAINTENANCE
GASOLINE ENGINE TUNE-UP SPECIFICATIONS
Engine
Engine Displacement
Year ID/VIN Liters (cc)
19911992199319941995199619972TZ-FE2TZ-FE2TZ-FE2TZ-FE2TZ-FZE2TZ-FE2TZ-FZE2TZ-FZE2TZ-FZE2.4 (2438)2.4 (2438)2.4 (2438)2.4 (2438)2.4 (2438)2.4 (2438)2.4 (2438)2.4 (2438)2.4 (2438)Spark Plugs
Gap
(in.)
0.430.430.430.430.430.430.430.430.43Ignition
Timing
__,. (*g.)5EKIT AT
ITDC5 r|TDC5E515EITDCITDC[TDC
5 ^ITDC5ETDC5 EJlTDC5Erroc
5BTDC5BTDC5BTDC5BTDC5BTDC5BTDC5BTDC5BTDC5BTDCFuel
Pump
(psi)
38-4438-4438-4438-4433-4038-4433-4033-4033-40Idle
Speed Valve
(rpm) Clearance
MT AT In.
7007007007007507507507507507507507507500.006-
0.010
0.006-
0.010
0.006-
0.010
0.006-
0.010
0.006-
0.010
0.006-
0.010
0.006-
0.010
0.006-
0.010
0.006-
0.010Ex.
0.010-
0.014
0.010-
0.014
0.010-
0.014
0.010-
0.014
0.010-
0.014
0.010-
0.014
0.010-
0.014
0.010-
0.014
0.010-
0.014
90911 COSIdle Speed and Mixture Adjustments
There are no provisions for adjustment of the idle speed and mixture on
the Previa models.Air Conditioning System
SYSTEM SERVICE & REPAIRI See Figure 114
•»lt is recommended that the A/C system be serviced by an EF \n 609 certified automotive technician utilizing a refriger mtrecovery/recycling machine.
The do-it-yourselfer should not service his/her own vehicle's A/C
for many reasons, including legal concerns, personal injury, envirom
damage and cost. The following are some of the reasons why you rre
decide not to service your own vehicle's A/C system.
According to the US Clean Air Act, it is a federal crime to service o
(involving the refrigerant) a Motor Vehicle Air Conditioning (MVAC) s
for money without being EPA certified. It is also illegal to vent R-12 ar
134a refrigerants into the atmosphere. Selling or distributing A/C syst
refrigerant (in a container which contains less than 20 pounds of refrii
to any person who is not EPA 609 certified is also not allowed by law.
State and/or local laws may be more strict than the federal regulat
so be sure to check with your state and/or local authorities for furthei
mation. For further federal information on the legality of servicing
system, call the EPA Stratospheric Ozone Hotline.
—Federal law dictates that a fine of up to $25,000 may be lev
people convicted of venting refrigerant into the atmosphere. Aystem
lentalrepair
stem
d Fi-
m
rant)Dns,
infor-
rA/Ced on
Idi-fatal cardiac arrhythmia have been reported in people accidentally subjected
to high levels of refrigerant. Some early symptoms include loss of concen-
tration and drowsiness.
"•Generally, the limit for exposure is lower for R-134a than it is for
R-12. Exceptional care must be practiced when handling R-134a.
Also, refrigerants can decompose at high temperatures (near gas heaters
or open flame), which may result in hydrofluoric acid, hydrochloric acid
and phosgene (a fatal nerve gas).
R-12 refrigerant can damage the environment because it is a Chlorofluo-
rocarbon (CFC), which has been proven to add to ozone layer depletion,
leading to increasing levels of UV radiation. UV radiation has been linked
with an increase in skin cancer, suppression of the human immune system,
an increase in cataracts, damage to .crops, damage to aquatic organisms, an
increase in ground-level ozone, and increased global warming.tionally, the EPA may pay up to $10,000 for information or services
leading to a criminal conviction of the violation of these laws.
When servicing an A/C system you run the risk of handling or corning in
contact with refrigerant, which may result in skin or eye irritation or ftpst-
bite. Although low in toxicity (due to chemical stability), inhalation of
centrated refrigerant fumes is dangerous and can result in death; casisof
Fig. 114 Look for a label specifying the type of refrigerant that
is in your vehicle