The Lotus Esprit Fact File - GM Multi-Port Cross-Reference

Parts Cross Reference

PART
Location	Part ID	Lotus Part Number	GM Part Number	Part #	Note*	Price**
Electric Control Module (ECM) w/o prom
Above RHS Fuel tank Note PROMS differ for SE and non SE ECM's	1228707	A910E7015	1228707 1228708 (weatherproof)	1228707 1228708	1	-
Direct Ignition Module
Right side wall engine bay	Module:10498D13 0198;8343;8E06-01	A910E6940 (assembly-includes all 3 parts)	10467214 10497771; 10472401;	D1927A	2	$217.26
High Tension Coils
Right side wall engine bay (need 2)	coil: 10497771		10477602	D555	3	$58.59
Mass Air Temperature (MAT) Sensor
Non-SE: air filter airbox, under right fuel tank board SE: side of chargecooler housing	AC 12v 1268 P.E.O. 62	A910E6927	25037334; 25036751	213-190	4	$37.00
Barometric (Baro) Pressure Sensor
Metal plate above right hand rear wheel arch	couldn't see due tolocation	A910E6935	16006833	16006833	5	$68.75
Manifold Air Pressure (MAP) Sensor
Metal plate above right hand rear wheel arch	couldn't see due tolocation	A910E6934	16009886	213-183	6	$85.00
Throttle Position Sensor (TPS)
Rear end of throttle spindle #4 throttle body)	80671 E0988 or 80671 E1709	A910E6961	17106680	547052	7	Unknown ($112.05 Lotus)
Oxygen (Lambda) Sensor
Exhaust outlet pipe after turbocharger before catalytic converter.	3 wire leads+ground on sensor body. No other ID	A910E0322	Bosch # 0 258 005 704 009 will work. PN on box 15704. Splice in or match up connector.		8	$54.00
Flywheel Sensor
Top of the clutch housing)	no markings	A910E6938	1103703	1103703	9	?
Knock Sensor
Cylinder block)	10456056	A910E6937	10456019	213-91	10	$65.50
Engine Coolant Temperature Sensor
Inlet water jacket)	not legible (print too small!)	A910E6928	Recommend Lotus	unknown
Idle Air Control (IAC) Valve
Inlet manifold)	59523 A2398 or 59523 G1709-	A910E6942	17111826	217-411	11	$95.75 ($96.57 Lotus)
Fuel Pressure Regulator
Rear end of fuel rail	T44T or TA3T no other markings	A910E6950	17112394	217-381	12	$113.00
Vacuum Pump
Front of engine (Note revised harness cars have an electric pump in the old engine relay compartment)	19308A	A910E9027	7844039 7841443	215-106 or 215-103	13	$279.00 $202.00
Primary Fuel Injector
Inlet manifold	6039 5235364 0118 5235364 (Rochester Products numbers)	A910E6941	Part Number SR 370 Source= RC Engineering (800) 525-4118		14	$57.00 each
Secondary Injector (not on Non-SE Models)
Intake Plenum	6039 5235435	C910E7007F	Lucas Saturated Type190cc/min- No part number- source= RC Engineering		14	$168.00
Charcoal Canister
Right rear engine bay	numbers obscured	A910E6944	easy match up when removed	unknown
Vehicle Speed Sensor (VSS)
Right rear wheel hub	not inspected	A910E6939	Lotus factory part only. Not released to aftermarket
Frequency Valve - Wastegate Control
Near turbo	Delco Remy 1849138	A082M6420	Lotus factory parts only. Not released to aftermarket
Exhaust Back-Pressure Valve (EBV) Vacuum Capsule
Exhaust pipe between catalytic converter and muffler	Delco Remy	A082M6421
Throttle Jacking Vacuum Capsule
Top of engine near throttle linkage.	1896068	A082M6421

*Notes:

1. ECM (Preferable over Lotus sourced part)

These units are the OEM part numbers, with 1228708 as the preferred part due to its waterproof case. The only difference between the two is the case. Most original units can be remanufactured or used to satisfy the core charge on the replacement. Prices vary depending on source. ($150-$200)

2. DIRECT IGNITION MODULE (Preferable over Lotus part - they will only sell the complete coil pack!)

This was a match up by application to the multi-port ignition used by GM in its Pontiac Quad 4 engine.

3. HIGH TENSION COILS (These are exact OEM as used by Lotus)

Direct match GM part number on Lotus OEM part.

4. MAT (Preferable over Lotus sourced part, and cheaper too..Lotus part = $66.85)

This was a match up by application to the multiport ignition used by GM in its Pontiac Quad 4 engine.

5. BARO SENSOR (Preferable over Lotus sourced part, and cheaper too..Lotus part = $131.98)

Match up to GM part and GM application.

6. MAP SENSOR (Preferable over Lotus sourced part, and cheaper too..Lotus part = $167.81)

Match up to GM part and GM application.

7. TPS SENSOR ( Recommend Lotus sourced part…Lotus price = $112.05)

This was a match up by application to the multiport ignition used by GM in its Pontiac Quad 4 engine.

8. OXYGEN SENSOR (Preferable over Lotus sourced part, and much cheaper! Lotus price = $256.33)

These are pretty much generic match-ups. Bosch makes several which can be used. Just make sure the leads are long enough and that the

new sensor has 4 wires. You can either match up the old connector with a new connector and install, or splice the new sensor wires onto the old connector.

9. FLYWHEEL SENSOR (If obtainable using Delco number, would use Delco unless Lotus sourced price was comparable)

This was a match up by application to the multi-port ignition used by GM in its Pontiac Quad 4 engine.

10. KNOCK SENSOR (Preferable over Lotus sourced part unless Lotus price was comparable)

Match up to GM part and GM application.

11. IAC CONTROL VALVE (Recommend Lotus sourced part…Lotus price = $96.57)

Match up to GM part and GM application.

12. FUEL PRESSURE REGULATOR (Preferable over Lotus sourced part…Lotus price = $152.01)

Match up to GM part and GM application.

13. VACUUM PUMP (Preferable over Lotus sourced part)

The numbers given are close matches. These parts are being phased out due to obsolescence. Some modifications maybe required.

14. FUEL INJECTORS (Preferable over Lotus sourced part)

The originals are Delco made and flowed out for the Lotus. Originals can be obtained from Lotus at substantially more cost. The above RC equivalents are exact matches.

** Prices

Prices are as of March 2000 and are meant to be used as a guideline only.

A great thank you to Tony Grasso for researching and putting this cross-reference data together.

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Cannot be reproduced or published without the expressed written consent of:

Karl-Franz Marquez
KFM Industries, Inc.
www.espritfactfile.com