HOTWIRE PLUS 8s
(3.9s = UK & Europe 1991-2000 or from 1998 for overseas Plus 8s)

There are more Hotwire Plus 8s that have been made than any other fueling type, EFI or carbs. Though they are more sophisticated than the Flapper models they are happily a far cry  from the later GEMS and, luckily, still very approachable by the home garagiste with some money. Few if any problems from the Factory. Diagnosis became easier with hand-held code readers. Sadly, the  system was the first to come under regulatory emissions pressure and there are ECU variations with the Morgan version having Morgan-specific features. Some  parts have become difficult to source (email me).but suppliers and hardware and software repair is still available. It is simply getting more costly and harder find. 

1. AIRFLOW
1.01 Air Duct Replacement
1.02 Air Filter
(WATCHPOINT)


2. COMPONENTS
2.01 MAF (airflow sensor) ADJUSTING
2.02 Different Tune Resistors (For Removing Your Cats)

2.03 Earth Wiring
2.04 Fan Belt
(Serpentine
)
2.05 Fuel Filter
2.06 Fuel Pump, Relay, Fuse & Inertia Switch
2.07
IAVC
(aka Stepper Motor) (your idle)

2.08 O2/Lambda Sensor (Checking yours)
2.09 Relays
2.10 Setting the Base Idle
2.11 Stepper Motor (your idle)
2.12 Throttle Potentiometer Replacement

2.13 Which Chips Are Which?

3. DIAGNOSIS
3.01 Article
(Component Basics)

3.02 Article 2 (some historical errors but excellent!)
3.03 Checking Procedure
3.04 Checking Procedure II (multimeter)
3.05 Diagnostic Reader(Land Rover)
3.06 Diagnostic Reader
(Morgan)

3.07 Diagnostic and Tuning Software 

3.08 Fault Codes
3.09 Rovacom
3.10 RoverGauge
(diagnostic tool for Hotwires)
3.11 Setting the Base Idle

3.12 TestBook
3.13
Hotwire Manual by Ciaran J. Brady ***
3.14 Hotwire Manual
by Land Rover

4. ECU
4.01 Overview
4.02 14CUX Variants
4.03 14CUX
4.04 Injection  (History & Overview)
4.05 Plug
4.06 Plug Pins
4.07 Removing the ECU Plug
4.08 Tune Resistors
4.09 Transducer
4.10 Variants & Numbers
4.11 Wiring Diagram

5. ISSUES
5.01 Idle Issue
5.02 Morgan Issue
5.03 Setting the Base Idle

5.04 Stalling
5.05 Rescue Kit


6. OPTIONS
6.01 3.9 & the 4.0
6.02 To Chip or Not to Chip (3.9s)
6.03 To Chip or Not to Chip (4.6s)
6.04 Chipping I (Installing a New)
6.05 Chipping II (Installing a New)
6.06 More Power?
6.07 Optimax Versus Tornado Chips

Google
Web www.gomog.com
 
An immense effort over a period of two decades was required to create this resource. The information
contained here may not be reproduced is offered
without any undertaking whatsoever and no warranty is
suggested or may be implied. We also require that those who publicly cite any items here to credit
this source.
This is the best way of avoiding danerous misinterpretation. Should you have a contribution  or a correction to this Manual that you feel may assist
 the Manual and your fellow Morgan enthusiasts please
 email us.
 
 
PLUS 8 INDEX GoMoG MANUAL GoMoG MAIN PAGE
  
This Manual is an ongoing process. We have a waiting line for posting many times what is presently availableongoing process. We have a waiting line for
 posting  many times what is presently available on line.  If you have a problem you do not see covered here,  you are welcome to contact us directly.