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From the Publisher
In How to Use and Upgrade to GM Gen III LS-Series Powertrain Control Systems, the benefits, advantages and nuances of this robust and efficient control system are thoroughly examined. Do you have a vehicle already equipped with an LS Series engine but want to do a transmission swap? Do you want to convert from a cable throttle to an electronic throttle, and make systems like cruise control integrate? Do you want to eliminate the dreaded Optispark distributor from your LT1/LT4? Perhaps convert your Gen I small-block to distributor-less ignition? Or convert to universal OBD-II diagnostics? Do you want an affordable control system to run fuel injection, ignition timing, cooling fans, air conditioning, and electronic overdrive transmissions while swapping all if this into your classic muscle car?
This book will cover all of these applications and more. Not only are the performance and flexibility aspects covered in great detail, but there are significant cost benefits as well.
Controllers
Notice the difference at the rear corner of these two 2003 PCMs. The one on the left (GM# 12582605) is missing the chip that handles the IAC stepper motor. The one on the right (GM# 12576106) includes the chip that handles the IAC stepper motor. Pay close attention to GM service numbers to be sure you have a PCM that works with your throttle type.
Ignition Systems
EFI Connection’s 24x LT1 conversion kit includes a crankshaft reluctor, crankshaft sensor, camshaft reluctor, camshaft sensor, and camshaft sensor housing. The camshaft sensor housing is installed on the face of the timing cover where the Optispark distributor used to reside. A 1996–1997 LT1 timing cover is required.
Tuners
EFILive’s early V1 (Version 1) hardware supports the Gen III PCMs, but not the later Gen IV CAN bus systems. EFILive’s V2 (Version 2) hardware supports both Gen III and Gen IV ECMs and PCMs. Both V1 and V2 use the same scanning and tuning software.
This 1933 Willys was built and owned by Bill Adam. The car originally had a 5.7L TPI engine from a 1987 Camaro Z28 and an ECM from a 1990 Corvette. Bill chose to upgrade the ECM to the GM# 12200411 PCM for greater tune-ability and a future 4L60-E transmission install.
Sensors and Inputs
While the LS2 throttle body is considered Gen IV equipment, it is electronically compatible (and often used as an upgrade) with the LS1/LS6 Corvette and 2004–2005 LS6 Cadillac CTS-V. All Gen IV GM throttle bodies have integrated TPSs. In the event that a TPS goes bad, the entire throttle body assembly needs to be replaced.
PCM Signal Outputs
The EGR valves used with the Gen III PCM are unlike the early vacuum-operated EGR valves. The LT1 EGR valve (left) opens when vacuum is applied through the electrical solenoid. (Notice the vacuum lines from the solenoid to the engine and from the solenoid to the EGR valve assembly.) Newer engines use an electronically controlled EGR valve (right) with an internal sensor. Early engines being converted for Gen III PCM use either need a custom EGR solution or the elimination of the EGR valve.
Includes 4 Different Conversions
Includes cruise control install, modern fuel injection, turbo tuning, electric fan installation, elimination of Optispark and more.
Publisher : CarTech; Illustrated edition (August 1, 2013)
Language : English
Paperback : 144 pages
ISBN-10 : 161325055X
ISBN-13 : 978-1613250556
Item Weight : 1.1 pounds
Dimensions : 8.5 x 0.38 x 11 inches
