How to Remove crankshaft harmonic dampner and pulley - chevy impala SS LT1LT4
Removal of the Chevy LT1/LT4 (how to remove crankshaft pulley/dampener.
More picture here : http://s73.photobucket.com/albums/i232/stevexperformance/stevex/?action=view¤t=LT1rollertimingsetinstall.jpg
GM LT1/LT4 5.7 liter engine (1992-1996) Optical Spark Distributor system (tune-up) Pt 1/2
The video we expose the internal of the Chevrolet LT1 front engine mount
electronic distributor (hi-voltage).Part of a Complete Tune-up processor.
HERE we explain the inner workings of Hi-Voltage Distribution Part.
This component can be found on the corvette,caprice,GMC
Subject: theory and testing of Opti-spark(optical) systems
Contributing Source: General Motor service manuals and training materials
The General Motor Opti-spark ignition system is used on 1994-96 4.3-liter
L99 (VIN W) V-8 engine and on 1992-97 5.7-liter LT1 (VIN P) V-8 engines.
The Opti-spark distributor is mounted on the front of the engine block,
above the crankshaft. The distributor is driven by the camshaft.
Opti-spark system rely on two optical cam position (CMP) sensors mounted
inside the distributor. Beginning in 1996, Opti-spark equipped vehicles
also included a crankshaft position (CKP) sensor mounted at the bottom of
the timing cover, The PCM uses this CKP sensor only for misfire diagnosis,
not ignition timing. This sensor is not part of the Opti-spark system.
The Opti-spark CMP sensor provide signal to the PCM (Powertrain Control
Module) for ignition timing control. These sensors detect slots in the
crank-driven signal disk. One CMP sensor detects 360 equally spaced slots
per camshaft revolution, for high-resolution timing control. The other CMP
sensor detect eight signal disc slots, the CMP reference signal toggle
between 0.0 and 5.0 volts. The PCM compares the two CMP signal to determine
if one of the inputs is not being received.
GM LT1/LT4 5.7 liter engine (1992-1996) Optical Spark Distributor system (tune-up) Pt 2/2
Part of a Complete Tune-up processor for the Chevrolet LT1(VIN P) and
L99(VIN W). HERE we inspect all the moving a friction parts for
Opti-spark trouble codes 1992-95
* Code 16 - sets if PCM detects high-resolution timing signal, but no low
resolution spark signal. Engine will not start while code 16 is set.
* Code 36 - sets if PCM detect low resolution spark plug signal, but no
high resolution timing signal. Engine will start while code 36 is set, but
performance and fuel economy will be adversely affected.
* Code 41 - sets if PCM senses the ignition control circuit is open, or
shorted to voltage while cranking. Engine will not start while code 41 is
* Code 42 - sets if PCM senses a grounded ignition circuit while cranking.
Engine will not start while code 42 is set.
Opti-spark OBD-II diagnostic trouble codes
* P0323 - sets if the PCM detect an interruption in either the low or high
* P0335 - sets if the PCM receives no signal from the crankshaft position
(CMP) sensor or if the signals from the CMP sensor and low resolution
distributor are significantly asynchronous.
* P0336 - stes if the PCM sensor and low resolution distributor signal are
only slightly asynchronous.
* P0372 - sets if the PCM sensor and low resolution pulses but no high
* P1351 - sets if the PCM detects voltage on the ignition control circuit
that exceeds 4.6 volts while cranking.
* P1361 - sets if the PCM detect 84 crankshaft revolution without any
ignition control activity during cranking.
* P1371 - stes if the PCM detects too many high resolution pulses before
detecting any low resolution pulses.
Opti-spark EST circuit.
The PCM combines the camshaft position information with other system
parameters to calculate the required spark advance and coil dwell.
Opti-spark ignition system do not have a bypass circuit in the ignition
module or the PCM. All ignition timing is controlled by the PCM. The PCM
signalz the ignition module through the EST circuit by grounding the
primary circuit that supplies current to the ignition coil, aopti-spark
system do not have a base timing adjustment. Timing advance and retart is
PCM controlled and factory set.
Opti-spark ignition control module (ICM) and Coil Assembly
The Opti-spark ignition control module (ICM) and high-output coil assembly
are mounted as one unit. The resistance specification for the coil are:
* PRIMARY - 0.3 to 1.3 ohms
*SECONDARY - 5.0 to 7.0 ohms
Found on Chevy Camaro,
caprice and corvette,Pontiac Firebird Trans-am,Buick Roadmaster
Nissan VG33E(V6)Engine - OBD-II Hitachi Throttle Position Sensor(TPS) Ajustment and idle control
In the video we show you how to adjust the Throttle Position Sensor(TPS) on
the Nissan frontier Vg33e(V6) Engine. By using a multi-volt meter we
explain all the process to make a proper adjustment to the TPS.
HOW TO ADJUST THE THROTTLE POSITION SENSOR.
HOW TO MAKE CHANGES IN ENGINE IDLE.
The throttle position sensor responds to the acceleration pedal movement.
This sensor is a kind of POTENTIOMETER which transforms the throttle
position into output voltage, and emits the voltage signal to the ECM. In
addition, the sensor detect the opening and closing speed of the throttle
valve and feeds the voltage singal to the ECM. Idle position of the
throttle valve is determined by the ECM recieveing the signal from the
throttle position sensor. This sensor controls engine such as fuel cut. On
the other hand, the "Wide Open and Close Throttle position switch", Which
is build into the throttle position sensor unit, is not used for engine
DTC(code) P01231 is Throttle Position Sensor circuit range/performance
problem - (A) A High voltage from the sensor is send to ECM under light
load driving condition - Possible cause is Harness or Connector(TP) sensor
circuit is open or shorted, or TPS, or Fuel injector, or Camshaft position
sensor, or Mass air flow sensor.
DTC(code) - P0121 is Throttle position sensor circuit range/performance
problem - (B) A low voltage from the sensor is sent to ECM under Heavy load
driving condition - Possible cause is Harness or connector(The TP sensor
circuit is open or shorted.), or Intake air leak, or TP sensor.
How To Water Pump Replacement LT1
An In depth video on how to replace the water pump on an LT1 or LT4 C4
Corvette... I go through each step so you can save money and do this easy
Comment below if you have any questions, tips, etc and give the video a
thumbs up if it was helpful!
Check out how to change the headlight gear in a Corvette:
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Waterpump, water pump, water-pump, engine, weep hole, water pump leak,
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Harmonic Balancer Installer Tool Instructions - How to ToolCast from BoxWrench
Harmonic balancer remover & installer tool. All in one tool from Proform
3 of 3 Harmonic Balancer videos
In this video we'll explain how to use a harmonic balancer installation
tool and why. This tool is a must for properly installing the harmonic
balancer onto the crank shaft nose of the engines rotating assembly.
If you need to see instructions on how to use a harmonic balancer removal
tool, click here:
For more free videos on engine building, carburetor tuning, transmission
rebuilding, Harley Davidson motorcycle tuning, check out our channel on
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96 Impala Camshaft and Optispark Seals 3 of 4
Part 3 of 4 Videos demonstrating replacing a 96 Impala's (LT1) camshaft and
optispark seals. This video shows opening and inspecting the optispark.
more info at:
96 Impala Air Pump Delete
Removing the air injection pump from a 1996 Impala SS.
more info at:
Music: "Car Wash" by The Howling Diablos
Crankshaft Pulley Removal Trick
Scotty Kilmer, mechanic for the last 46 years, shows a trick to let you
easily remove a crankshaft pulley from your car, no power Air tools needed.
And, If you like my car help, be sure to watch my live car talk show every
Saturday morning at 10 AM CST on YouTube. I answer your car questions LIVE
there. Just check it out at
eature=c4-overview . And remember, every TUESDAY I upload a new video, so
don't miss them.
How to Install a Supercharger (Procharger for LT1 Firebird)
We are taking you from start to finish on how to install a Procharger
centrifugal Supercharger on our project
Firebird! From stock replacement parts to high-performance aftermarket
accessories, Andy's Auto Sport has what you need to get the looks and power
your vehicle deserves.
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Guy blows up his friends LT1 Camaro
engine was knocking so we decided to do doughnuts then BOOM. We bought the
car as is already knocking. Owner was having another LT1 built in the
machine shop for all the "Why" comments...