Fuel system specifications (Scorpio 1)

Fuel tank

Made from sheet steel, the fuel tank is mounted in front of the rear axle and is held in place by two plates.

Capacity	70 dm³
Location of the tank filler neck	on the right rear fender
Fuel type	gasoline leaded with an octane rating of 98 or unleaded with an octane rating of at least 95

Air filter

The air filter has a replaceable paper filter element located in a housing made of artificial material.

Power supply system:
– 1.8 dm³	pierburg two-chamber carburetor
– 2.0 dm³	weber twin-barrel carburetor
– engines with fuel injection system	electronic system EEC II or EEC IV

Idle speed

Engine 1.8 dm³	800±20 rpm
2.0 dm³ engine with carburetor:
- OHC engine	800 or 875 rpm
– DOHC engine:
with manual transmission	850±25 rpm
with automatic transmission	875±25 rpm
2.0 dm³ engine with injection system:
- OHC engine	800 or 875 rpm
– DOHC engine	875±50 rpm
Engine V6 2.4 dm³	850±50 rpm
Engine V6 2.8 dm³	850 rpm
Engine V6 2.9 dm³	850±50 rpm

CO level at idle speed

Engine 1.8 dm³	1,3%
2.0 dm³ engine with carburetor:
- OHC engine	0,75 – 1,50%
– DOHC engine	1,0±0,25%
2.0 dm³ with injection system:
- OHC engine	0,5 – 1,0%
– DOHC engine	1,0 – 1,5%
V6 2.4 dm³ engine without catalytic converter	0,5 – 1,0%
Engine V6 2.8 dm³	0,5 – 1,0%
V6 2.9 dm³ engine with catalytic converter	0,5 – 1,0%

Air filter

1.8 dm³ ONS (carburetor)	Champion W1 13
2.0 dm³ ONS (carburetor)	Champion W152
2.0 dm³ OHC (injection)	Champion U507
2.8 dm³ OHV (injection)	Champion U507

Fuel filter

2.0 dm³ OHC (injection)	Champion L204
2.8 dm³ (injection)	Champion L204

Fuel pump

The mechanical diaphragm pump is driven by an eccentric on the intermediate shaft.

Fuel supply pressure: 24–41 kPa.

On vehicles with an injection system, an electric fuel pump is used, with a capacity of 0.8 l/min.

Carburetor Pierburg 2V

Diffuser diameter:
- primary chamber	23 mm
- secondary chamber	26 mm
Jet size:
- fuel, idle	45
- air, idle	115
- main primary	107,5
- main secondary	130

Adjustments

Fast idle speed (when engine is warming up)	1800±100 rpm (at the second – highest stage of the cam)
Vacuum return device of the air (starting) damper	3 mm
Installing a throttle damper	2±0.5 mm
Float level	not regulated
Installation of automatic (starting) damper	by tag

Carburetor Pierburg 2E3

	First camera	Second camera
Diffuser diameter, mm	23	26
Main dosing system:
- main fuel jet	107,5	130 (135)
- air jet	85	60
Idle system:
- main fuel jet	45	–
- air jet	115 (200)	–
Accelerator pump:
– nozzle diameter	0,5	–
– volume of fuel supplied in 10 cycles, cm³	11	–
Starting clearances:
- throttle valve	0,85	–
- air damper	3,0	–
Throttle valve opening of a cold engine at idle speed, mm	4,2	–
Fuel level in the float chamber, mm	27,5
Needle valve opening, mm	1,75
Cold engine idle speed, rpm	1850 – 1950
Hot engine idle speed, rpm	850 – 900
CO content,%	1,0 – 1,5

Weber 2V Carburetor

	First camera	Second camera
Mixing chamber diameter, mm	30	34
Diffuser diameter:
– 85HFCA and DA	25	27
– 85HFGA, HA, MA and NA	23	25
Jet size 85HFCA:
- main fuel jet	112	135
- air jet	165	150
- type of emulsion tube	F22	F22
- idle jet	45	45
Jet size 85HFDA:
- main fuel jet	110	135
- air jet	160	150
- type of emulsion tube	F22	F22
- idle jet	45	45
Jet size 85HFGA and HA:
- main fuel jet	107	125
- air jet	180	160
- type of emulsion tube	F59	F59
- idle jet	45	50
85HFMA Jet Dimensions:
- main fuel jet	105	130
- air jet	200	160
- type of emulsion tube	F59	F59
- idle jet	45	50
85HFNA Jet Dimensions:
- main fuel jet	110	125
- air jet	180	160
- type of emulsion tube	F59	F59
- idle jet	450	50

Adjustments

Vacuum return device of air damper (max):
– 85HFCA	9.0 mm
– 85HFDA	8.0 mm
- all others	7.5 mm
Installing the bimetallic spring housing:
– 85HFCA, DA, NA, MA	by label 85HFGA and NA
– 85HFGA and NA	3 mm from the support
Float level	7.5 – 8.5 mm

Carburetor Weber 2V TLD

	First camera	Second camera
Mixing chamber diameter	23	25
Main fuel jet:
- manual transmission	115	157
- automatic transmission	112	157
Air jet:
- manual transmission	175	145
- automatic transmission	210	145
Emulsion tube	F114	F3
Idle speed:
- manual transmission	850±25 rpm
- automatic transmission	875±25 rpm
Fast idle speed	1800±50 rpm
Fuel level in the float chamber	29.0±0.5 mm
CO content	1,0±0,25%

Fuel injection systems

Type	Bosch
Fuel pump type	electric rotary
Fuel pump outlet pressure	more than 5 bar at 12V no flow
Pressure in the system	2.5 bar

Tightening moments

Inlet manifold - ONS	17 – 21 Nm
Intake Manifold – V6:
– Stage I	4 – 8 Nm
– Stage II	8 – 15 Nm
– Stage III	15 – 21 Nm
– Stage IV	21 – 25 Nm
– Stage V (after testing)	21 – 25 Nm
High pressure chamber to intake manifold (V6)	7 – 10 Nm
Exhaust manifold:
- ONS	21 – 25 Nm
– V6	25 – 30 Nm
Mechanical pump bolts	14 – 18 Nm
Fuel pipe to injection pressure regulator:
- ONS	15 – 20 Nm
– V6	10 – 12 Nm
Pressure regulator base nut:
- ONS	20 – 25 Nm
– V6	15 – 20 Nm
Fuel line bolts (FRB)	9 – 11 Nm
Exhaust Inlet Pipe Flange Nuts	35 – 40 Nm
Clamps and collars	38 – 45 Nm