Question about 1994 Buick Roadmaster

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Crankshaft sensor need to know where the three wires caming from the sensor need to go to or where do they conect to what part of the ignition system

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  • pitacoche Sep 05, 2008

    v8 lt1 engine on a 94 buick roadmaser and the colors of the wires are orange red and pink and like i said i nee to know where do they conect from the cranckshaft sensor to what part of the ingnition system

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Where are these wires located? and what colors are they? is this a 3.1 or a 3.8?

Posted on Sep 05, 2008

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97 oldsmobile achieva wont fire changed coil pack spark plugs cam sensor still wont start


Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

Nov 04, 2016 | Oldsmobile Cars & Trucks

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How do replace ignition control module in 1998 K-1500 5.0 liter vortec


This system does not use the ignition module used on the DI systems in the past. The VCM controller now controls the ignition control (IC) and bypass functions.
The crankshaft sensor, located in the front engine cover, is perpendicular to a target wheel attached to the crankshaft. The target wheel is equipped with slots situated 60 degrees apart. As the crankshaft rotates, the target wheel rotates past the crankshaft position sensor. The rising and falling edges created by the slots cause a signal to be sent back to the VCM. This signal occurs three times per crankshaft revolution and is referred to as the 3x signal for V6 applications. The signal occurs four times per crankshaft revolution and is referred to as the 4x signal for V8 applications.
The VCM then utilizes this 3x (V6) or 4x (V8) signal in order to provide the correct spark to the engine by way of the single coil driver module. The single coil driver module is basically an electronic switch that when commanded by the VCM, causes the primary coil voltage to breakdown, energizing the secondary coil and providing a spark via the coil wire to the distributor cap. The distributor consists of the following components:
The system consists of the following components:
?€¢
Vehicle control module (VCM)


?€¢
Distributor


?€¢
Ignition coil driver module


?€¢
Ignition coil


?€¢
Crankshaft position (CKP) sensor


Now which part do you want to replace ?

?€¢
Cap and rotor


?€¢
Camshaft position sensor


?€¢
Gear drive and shaft

The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position (CMP) sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the camshaft position sensor will not affect driveability. The sole purpose of the camshaft position sensor is to provide the VCM with the necessary information for the misfire diagnostic trouble codes (DTCs).

Sep 06, 2015 | 1998 Chevrolet K1500

1 Answer

Where is the distributor on a 2001 Cadillac deville?


Has no distributor - electronic ignition !
The electronic ignition system does not use the conventional distributor and coil. The ignition system consists of the following components/circuits:
?€¢
Eight ignition coils


?€¢
Eight ignition control (IC) circuits


?€¢
Two ignition control modules (one per cylinder bank)


?€¢
Camshaft position (CMP) sensor


?€¢
Crankshaft position (CKP) sensor A


?€¢
Crankshaft position (CKP) sensor B


?€¢
Related connecting wires


?€¢
Powertrain control module (PCM)

Jul 29, 2015 | Cadillac Cars & Trucks

2 Answers

I've replaced everything to do with ignition spark on ky 1998 gmc pickup it has a 350 vortech engine why am I jot getting spark at the spark plugs ?


There is a spark control modal in the distributor most books do not tell you about it . if you have replaced everything else try that

Apr 19, 2015 | GMC Cars & Trucks

1 Answer

Rplaced crank sensor and sensors with kit from nissan. crank sensor has white dot. and light came back on and codep0335.


P0335 Crankshaft Position Sensor -Circuit Malfunction
Sorry but i think this fault is caused by a build up of residual magnatism in the crankshaft if a later model where the sensor is picking up from the crankshaft through the cylinder block type fitting ,what i do in cases like this is to try reversing the wires on the sensor it might just work although not always depending on make and type of ignition system .On some opel models i refit with parts from a scrapyard the earlier type of sensor which was on the front pulley as this clears the fault .Failing which ask at the dealers for help and what they recomend as a dealer mechanic will only work on their models and know them inside out unlike this aging old fleet truck mechanic .Who know very little about the modern advanced electronics used on modern vehicles with encyrption chips built into the cars computers to stop people like me from playing with them

Jan 23, 2013 | Cars & Trucks

2 Answers

How do you test a cam sensor in a 2003 volvo S80


Crankshaft Position (CKP) Sensors and Camshaft Positions (CMP) Sensors used on cars and trucks today come in all sorts of different shapes, sizes and configurations. All this variety might make you think that testing them is difficult and/or impossible. Well, nothing could be further from the truth since they can be easily tested with simple tools and testing techniques.
intrigue.jpgtercel.jpgPhoto 2 of 3This one belongs to a 94 Chevy Astro mini-van. This
Crank Sensor is a Pick Up Coil type that produces an Analog Signal.

This article is a primer that will help you to learn and understand the essentials of testing the Crankshaft Position Sensor (Camshaft Position Sensors too). You'll learn basic working theory, do's and don'ts, what tools to use and how to test them, and a lot of other good stuff.
How to Tell Them Apart

Another thing that can make testing the CKP and CMP Sensors seem intimidating is the fact that every make and model rolling around on pavement uses a different type of Position Sensor. For example, the Ford truck your neighbor might be driving will have a Position Sensor(s) that is (are) completely different in appearance than your GM (or Chrysler, or Honda, or Nissan or Suzuki, etc.) vehicle.

Not only that, but these sensors are called by so many different names like: Hall Effect Sensor, CKP Sensor, CMP Sensor, Pickup Coil, Magnetic Pulse Generator, Variable Reluctor, and the list goes on with a few more names. This may make it seem like every single one is tested in a different way. Well, the good news is that although they all differ from one another physically and are called so many god-knows-what names, they can usually be generalized into two basic categories: 2 wire type and 3 wire type. And this means that you only have to learn two specific testing methods.

So, before we dive into the rest of the article, I want to emphasize that the key to successfully testing and diagnosing all of the different Crank Sensors (and Cam Sensors) out there, is to know if they are either a two or three wire type! Now in case you're wondering what I mean by two and three wire types... I'm referring to the amount of wires in their connector (of course there's always an exception to every rule, but more about this later). Alright, let's jump into the next subheading and let's start learning more about this.
What does a Crankshaft (Camshaft) Position Sensor Do?

I'll start by explaining the specific role that the Crank (and Cam) Sensor play in the Electronic Ignition System of your car or truck. This info applies to whatever make and model you may be driving, so whether it's a Ford, a Chevy, a Chrysler/Dodge/Jeep, a Nissan, a Honda, a Toyota, or whatever, this primer will help.

In a nutshell, the Crankshaft Position Sensor's job is to help: 1) the Ignition System produce Spark and 2) the Fuel System to start injecting gasoline into the cylinders. All this so that the vehicle's engine will start and stay running. More specifically, the CKP Sensor produces a signal that tells the Fuel Injection Computer or the Ignition Control Module the exact position of the cylinder pistons as they come up or go down in the compression cycle. With this information the Fuel Injection Computer or the Ignition Control Module knows the exact time it has to make the Ignition Coil or Ignition Coils spark (not to mention when to start injecting fuel into the cylinders). Lastly, this signal can be either an Analog Voltage Signal of a Digital DC Voltage Signal.

Aug 30, 2012 | Volvo S80 Cars & Trucks

1 Answer

My mother has a 1993 Oldsmoblile Cutlass Cierra. It's a 3.3. She had a new engine put in it last year. Now her car died yesterday. She had to have it towed home so my brother could look at it. He got...


Check for spark. My guess would be the ignition module going out, but could also be the crank sensor. The module sits under the coils. Check all coils for spark. If any coil doesn't spark, you can try replacing just that coil, but the problem may still be the module underneath. If you have a meter, run a resistance check on each coil from the terminals to ground. If the same coil that doesn't fire aslo has a different resistance, replace that coil.
If you have a meter, check the AC voltage on each of the crank sensor wires shown as compared to ground or battery positive. If the AC voltages are different on the three wires, suspect the sensor is bad, but also check the tone ring on the pulley (Fig 2 below) for any damage.
Please see my tip at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines for how to check for spark. These are genericinstructions.
The 3.3L engine is the only one with the C 3 I system. REMOVAL and INSTALLATION C3I Module See Figure 1
  1. Disconnect the negative battery cable.
  2. Unplug the 14-way connector at the ignition module.

jturcotte_1656.gif
Fig. Fig. 1: Distributorless C 3 I coils and module system - 3.3L engine
  1. Tag and disconnect the spark plug wires at the coil assembly.
  2. Remove the nuts and washers securing the C 3 I module assembly to the bracket.
  3. Remove the 6 bolts attaching the coil assemblies to the ignition module.

To install:
  1. Install the coil assemblies to the ignition module and install the 6 attaching bolts.
  2. Install the nuts and washers attaching the assembly to the bracket.
  3. Connect the spark plug wires.
  4. Engage the 14-way connector to the module.
  5. Connect the negative battery cable, then reset the clock, radio and any other accessories.

Ignition Coil(s)
  1. Disconnect the negative battery cable.
  2. Tag and disconnect the spark plug wires.
  3. Remove ignition coil attaching bolts, then the ignition coil from the module.

To install:
  1. Install the coil(s) and attaching bolts.
  2. Connect the spark plug wires.
  3. Connect the negative battery cable, then reset the clock, radio and any other accessories.

Dual Crankshaft Sensor
See Figures 2, 3 and 4
  1. Disconnect battery negative cable.
  2. Remove serpentine belt from crankshaft pulley.
  3. Raise and safely support the vehicle.
  4. Remove right front tire and wheel assembly, then the inner access cover.
  5. Remove crankshaft harmonic balancer retaining bolt and crankshaft harmonic balancer.
jturcotte_1657.gif

Fig. Fig. 2: Harmonic balancer with interrupter rings on C 3 I system
  1. Unplug the electrical connector from the sensor and remove the crankshaft sensor from the vehicle.

To install:
  1. Loosely install the crankshaft sensor on the pedestal.
jturcotte_1658.gif

Fig. Fig. 3: Dual crankshaft sensor - C 3 I system
  1. Position the sensor with the pedestal attached on special tool J-37089.
  2. Position the tool on the crankshaft.
  3. Install the bolts to hold the pedestal to the block face. Tighten to 14-28 ft. lbs. (20-40 Nm).
  4. Tighten the pedestal pinch bolt to 30-35 inch lbs. (3-4 Nm).
  5. Remove special tool J-37089.
  6. Place special tool J-37089 on the harmonic balancer and turn. If any vane of the harmonic balancer touches the tool, replace the balancer assembly.

A clearance of 0.025 inch is required on either side of the interrupter ring. Be certain to obtain the correct clearance. Failure to do so will damage the sensor. A misadjusted sensor of bent interrupter ring could cause rubbing of the sensor, resulting in potential driveability problems, such as rough idle, poor performance, or a no start condition.
  1. Install the balancer on the crankshaft and install the crankshaft balancer bolt. Tighten to 200-239 ft. lbs. (270-325 Nm).
  2. Install the inner fender shield.
  3. Install the tire and wheel assembly. Tighten to 100 ft. lbs. (140 Nm).
  4. Lower the vehicle.
  5. Install the serpentine belt.
  6. Connect the negative battery cable, then reset the clock, radio and any other accessories.
jturcotte_1659.gif

Fig. Fig. 4: Distributorless C 3 I positioning tool J-37089 for installing dual crankshaft sensor.system - 3.3L engine

May 07, 2011 | 1990 Oldsmobile Cutlass Ciera

1 Answer

How to fix a coail pack on a 1987 Pontiac 6000?


Coil packs are replaced not repaired if found to be defective. ---prev.gif next.gif DISTRIBUTORLESS IGNITION SYSTEMS Starting in 1987, some models came with engines equipped with a Computer Controlled Coil Ignition (C3I) or Distributorless Ignition System (DIS). Fig. 1: Triggering system used on the C3I fast start system 86812034.gif
Fig. 2: Electrical schematic on C3I ignition system 86812031.gif Both DIS and C3I system consists of the coil pack, ignition module, crankshaft sensor, interrupter rings and ignition control module (ICM). All components are serviced as complete assemblies, although individual coils are available for Type 2 coil packs. Since the ICM controls the ignition timing, no timing adjustments are necessary or possible. Fig. 3: Wiring schematic used on the C3I ignition system 86812032.gif Fig. 4: Notch effect on the output signal used on the crankshaft sensor 86812033.gif
prev.gif next.gif

Oct 09, 2010 | 1987 Pontiac 6000

1 Answer

No fire to the plugs


Well let me give you a brief understanding of the electrical ignition system.

The PCM controls the ground circuit for the ignition coil ground circuit. So basically the PCM determines when to open and close the ground circuit for each individual ignition coil, therefore making it give power to the spark plug or not.

The ignition coils get there power from a power distribution center which as an ASD (Automatic Shut Down) Relay located inside of it. So your problem may lay within this.

Also, like you said, you may need to check the crankshaft and camshaft sensors because they give information to the PCM which then calculates the best timing for the system.

To check the crankshaft sensor first check the harness and test to see if the sensor is getting 5.0 volts. To do this you need to connect the positive end of a voltmeter to the orange wire terminal and the negative lead the the black/lt blue wire terminal at the harness connector. Then turn on the ignition and check the voltage. If voltage isn't right check the wiring between the PCM and the sensor.

If you are getting the correct voltage next check the sensor itself. You need to reconnect the harness to the sensor and you need an analog voltmeter. Then you need to backprobe the harness, which is sliding the probes from the meter into the wire side of the harness, if you meter has clips then get a sharp pin and slide into the harness and clip the meter to the pin.

Checking the Crankshaft Position Sensor

With the sensor connected, backprobe the gray/black wire terminal of the sensor connector to the positive lead on the analog meter and the negative lead connects to an engine ground. Turn the ignition key On and with a breaker bar and sockey manually turn the crankshaft clockwise. Do one full revolution and keep an eye on the meter, if you get readings of 5.0 volts then the sensor is good if not replace the sensor.

Checking the Camshaft Position Sensor

Again check the harness for the sensor first. The positive lead of an analog voltmeter connects to the orange wire terminal and the negative lead to the black/lt blue wire terminal. Turn ignition on and you should get approx. 5.0 volts. If voltage is incorrect check the wiring.

If wiring the harness is giving adequate power now check the sensor. Its the same idea used to check the crankshaft sensor but this time connect the power lead of the meter to the backprobe connected to the tan/yellow wire terminal and the ground lead to a good ground. Turn ignition On position and manual turn the crankshaft clockwise a full revolution while also checking for the meter to fluctuate between 0.0 and 5.0 volts. If you don't get the proper reading then the sensor is bad.

This should help solve your problem.

Apr 16, 2009 | 2004 Dodge Intrepid

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