Fuel tanks, fuel pump and fuel systems - multi point injection

Multi Point Injection
As emissions regulations became ever more stringent through the 1990s, Rover had to re-engineer their Single Point Injection (SPi) fitted models to accept more conventional and more efficient injection systems, which deleted the single injector from the throttle body in favour of multiple injectors mounted on a fuel rail. The Mini thus became the proud owner of two injectors in a system known sometimes as Twin Point, although most of the market place refers to it as Multi Point Injection ('MPi'). From 1997 the MPi system was specified for Minis in all markets except Japan, which retained SPi through to the end of production.

Fuel Tanks
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
1	WFE106090	FUEL TANK ASS'Y, restricted filler neck, Black	1	Not Paul Smith limited edition.
	WFE106090HOQ	FUEL TANK ASS'Y, restricted filler neck, Citrus Green	1	Paul Smith limited edition, 1998.
2	XNB100380	SENDER UNIT, fuel gauge, locking ring type	1
3	ARA1501	RING, locking sender unit to tank	1
4	ARA1502	SEAL, sender unit to tank	1
5	WLD100660	FILLER CAP, locking, non-ventilated, chrome finish	1
6	21A2109	SEAL, filler cap	1	Included in filler caps.
7	FAM3135	SEAL, filler neck	1
8	WGG100010	GROMMET, filler neck to back panel	1
9	21A2838	STRAP, tank retaining, diagonal	1
10	SH605061	SCREW, strap to seat brace	1
11	LWZ205	WASHER, locking	1
12	13H7583	SCREW, strap to rear floor bracket	1
13	346071A	NUT RETAINER, J type	1
14	WJX10010	PROTECTOR, fuel tank	1
15	WZM10001	FASTENER, protector	2

Fuel Pump
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
16	WFX100810	FUEL PUMP ASSEMBLY, with filter	1
	WFX100810P	FUEL PUMP ASSEMBLY, without filter	1	Non-genuine.
17	EDP9317	PACKING, pump mounting	1

Fuel System
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
18	WFU100560	VALVES AND BRACKET ASS'Y	1
19	WJP105870	VENT PIPE, valve hose to charcoal cannister	1
20	WJH10139	HOSE, tank to fuel pipe	1	Marked with orange identification bands.
21	WJP105860	FUEL PIPE ASS'Y, tank to filter	1
22	GFE7059	FILTER, fuel	1	1997-98.
	WJN101190	FILTER, fuel	1	1998 on.
23	WKB10019	ADAPTOR, filter inlet	1	1997-98.
24	WKB10018	PIPE, outlet to fuel pipe	1	1997-98.
25	WKB10018L	PIPE, outlet to fuel pipe	1	1998 on.
26	EDP9976	O RING, adaptor	2
27	WJU10142	BRACKET, filter mounting	1
28	CRC9380	MOUNTING, rubber, bracket	2
29	CRC9389	DISTANCE PIECE, mounting	2
30	FS106165	SCREW, filter mounting, long	1
31	FS106105	SCREW, filter mounting, short	1
32	WJP105880	FUEL PIPE ASS'Y, filter to engine	1
33	WJP105890	FUEL PIPE ASS'Y, return from engine to tank	1
34	WJH10264	HOSE, return pipe to tank	1
35	MHQ100130	SWITCH AND BRACKET ASS'Y, inertia	1
36	WQT100030	SWITCH, inertia, fuel cut off	1	Included in switch and bracket ass'y.
37	WYA10001	GROMMET, triple, fuel pipes through rear floor	1
38	WJC10034	CLIP, pipes to body	6
39	UKC3803	CLIP, hose	4
40	WJX10008	PROTECTOR, fuel pipes, front	1
41	EYH10001	NUT, nylon	4

Throttle Body
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
42	MHB101351	THROTTLE BODY ASSEMBLY, 48mm bore	1	With original plastic body.
	ABF622	THROTTLE BODY ASSEMBLY, 48mm bore	1	With improved alloy body.
	ABF637	THROTTLE BODY ASSEMBLY, 52mm bore	1	With improved alloy body; large bore version.
The original factory MPi throttle body, being plastic, tends to suffer from distortion and cracking (it is in a rather warm place, after all). An alloy bodied replacement throttle body of course suffers neither of these problems, and actually benefits from the fact that the throttle valve can open further. A larger 52mm bore version of the alloy body is also available, providing a very useful power increase of up to 10%. Taking only about thirty minutes to install, neither of the alloy throttle bodies require adjustments to be made to the engine's electronic control unit. However ECU adjustment would probably be necessary to realise full potential if using the large bore throttle body together with other engine or exhaust modifications.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
43	MHB101351RS	O RING, throttle body upper	1	Included in throttle body assembly.
44	SLD100080	POTENTIOMETER KIT, throttle body	1	Included in throttle body assembly.
45	MLZ100050	STEPPER MOTOR (idle control valve)	1
46	JZX6187	SCREW, stepper motor attaching	2	Included in stepper motor assembly.
47	MAH100970	HOSE, vacuum	1
48	FS106257	SCREW, flanged, throttle body to manifold	4
49	MHU100900	BRACKET, abutment	1
50	AAU6365	TIE WRAP, harness	1

Fuel Rail
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
51	MJN100670	FUEL RAIL ASS'Y, with regulator	1
52	FB106067	BOLT, flanged, fuel rail to manifold	2
53	MHH100280	HOSE, vacuum, manifold to regulator	1
54	MYC100230	CLIP, hose to regulator	1
55	MJY100460	FUEL INJECTOR ASSEMBLY	2
56	MKG100240	O RING KIT, injector	2	Included in injector assembly.
57	MHN10004	CLIP, fuel injector	2
58	WJH103900	PIPE ASS'Y, fuel rail feed	1
59	WJH103910	PIPE ASS'Y, fuel rail to return pipe	1
60	BAU5325	O RING	2	Included in fuel rail feed and return pipes.
61	MYP100300	SCREW, pipes to fuel rail	4

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Fuel tanks, fuel pump and fuel systems - multi point injection

SEAL- RUBBER, THROTTLE BODY TO FILTER. MPI

FUEL PIPE- FUEL FILTER OUTLET TO MAIN LINE, '98 ON

FUEL PIPE ASSY.RETURN FROM ENGINE TO TANK-MPI& SPI JAP'97 ON

SENDER UNIT-FUEL TANK-SPI AND MPI

FASTENER-FUEL TANK PROTECTOR TO TANK-'92-'00

SWITCH-INERTIA-FUEL CUT OFF-SPI & MPI

FUEL CAP-LOCKING-NON VENTED-STAINLESS

ADAPTOR-FUEL FILTER TO INLET PIPE, SPI & MPI TO '98

FUEL PIPE- FILTER TO MAIN LINE SPI & MPI TO '98

PROTECTOR-FUEL TANK-'92-'00

PROTECTOR-FUEL PIPES UNDER FLOOR-'92-'00

BRACKET-FUEL FILTER MOUNTING- SPI & MPI

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