Excessive Fuel Consumption - Toyota 4A-F Repair Manual

EM-14
Probl.m
Poor gasoline
miIuge
Probl.m
UropInHnl odo.-

EXCESSIVE FUEL CONSUMPTION

ceuM
P", .. lbl.
Fuel INk
.. cIH.- cloHed
A
mCOff.cl
igni60n timing
EFI
Sfft... , problem,
ty
• Injec or fau l
l
O'C.I .... "ion fuel Cut IY5tem
•
faulty
Idle apeed
to h ig h
Sparl< plug faully
[GR IYII.m ..... s on
Low compr.uion
II ... imCorO(loertY
",Iklted
Cluk:h slips
a.akes drag
UNPLEASANT ODOR
POIIJb4oe cus.
idle speed
Incorrect
i9<'i n
Inoor rect i
l o limong
\(Kuum I.ah
• PC\{ line
EGR �nfI Iwl
• EGR
manifold
• lrltaka
. ch mbe
tA .. i n lllk a
• I,"ak.
o.:ont.oI vIlYe
Throllloo body
•
• Btalt e bOot, .
line
.
EFI .yst"" ""�
ReptMl'
Check air d • .ner
A.MI timing
R.pair., OKHsa"l
Adjom
Inspect
Chec:k
Check compression
Inflat.
Troublnhool ctulch
TroubilfhOol brakes
AdjYtI idlo o spee d
R'Hlliming
Repllir " nee.55a..,
$yStem)
)
r
R.p."
--
nKOIUDry
&1
idIto .PMf;I
pIu!1S
EGR 'Y5tem
proper ptelSUr.
lifH 10
R. m .dy
..
&1 oec . . ry
Pag.
[M_34
EM-37
£M-39, .2
1G_20, 21
E _ 1
M 4
''' .
EM_39, 42
EM_31