Question about 1993 Isuzu Pickup

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Trouble turning over

I had an ignition problem so i went all through the system and wound up replacing the control module and the coil. after that she runs but not like she did before and when im trying to start its like the motor dosnt want to turn over

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  • Isuzu Master
  • 5,317 Answers

Have you checkedthe timing? If timing is off, it can cause the motor to act like that- difficult to turn. If the timing is right, a check of the engine internals could be done by removing all the spark plugs and then cranking the engine over-it should spin more freely with the plugs removed. Is your engine oil clean and not gunked up?

Posted on Nov 04, 2012

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Posted on Jan 02, 2017

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SOURCE: Cannot start the engine, the ignition coil is too much hot

if the coil is very hot,,u may need to replace it,,,,

Posted on May 24, 2010

SOURCE: I have changed everything: Spark

There are three components that will enrich the fuel mix: 1)engine coolant temperature sensor. If this is not working or the signal is interrupted by a wire breakage then the engine will run rich. The coolant sensor informs the ECU (high resistance) that the engine is cold at start up and so the ECU responds by increasing the fuel injection cycle to enrich the fuel air mix. Later on as the engine warms the resistance of the coolant sensor drops and the injection cycle is reduced by the ECU. If the sensor is faulty or has become disconnected (wire break or corrosion of the socket pins) the ECU assumes that the engine remains 'cold' and the engine runs permanently rich. 2) O2 sensor, operates completely independently of the EGR, if it is faulty and signals 'too much oxygen' then the ECU will significantly enrich the fuel mix to try and balance what it thinks is an excess of air. 3) Fuel pressure regulator. If the diaphragm has broken or there is a leak in the vacuum line this will result in higher than needed fuel pressure in the fuel rail at idle. The vacuum line acts against the spring pressure holding the valve closed. At idle, the inlet vacuum pulls back on the diaphragm reducing the fuel pressure required to open the valve. Low fuel pressure coupled with short duration injection times will mean a lean mix at idle. If the vacuum is compromised or the diaphragm damaged then the increase in rail pressure will make the fuel mix very rich to point of flooding the engine

Posted on Nov 02, 2010

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1 Answer

Do a 2004 Envoy SLT 4.2L have a Ignition Module?


Crankshaft position sensor,cam sensor . your vehicle should have coil on plug , a coil at each spark plug !
Ignition Coils
Each ignition coil has an ignition 1 feed and a ground. The PCM supplies an ignition control (IC) circuit. Each ignition coil contains a solid state driver module as its primary element. The powertrain control module (PCM) signals the coil driver to initiate a firing event by applying a signal to the IC circuit at the appropriate time. When the signal is removed, the coil fires the spark plug. The spark plugs are tipped with platinum for long wear and higher efficiency.
During normal operation the powertrain control module (PCM) controls all ignition functions. If either the crankshaft position (CKP) or camshaft position (CMP) sensor signal is lost, the engine will continue to run because the PCM will default to a limp home mode using the remaining sensor input. As mentioned above, each coil is internally protected against damage from excessive voltage. If one or more coils were to fail in this manner, a misfiring condition would result. Diagnostic trouble codes are available to accurately diagnose the ignition system with a scan tool.
If a crank sensor is replaced a Crankshaft Position System Variation Learn must be done and a scan tool is need to do this.

Nov 30, 2016 | 2004 GMC Envoy SLT

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Location of ignition control module 2001 cadilac deville


Ignition Coils/Modules
The electronic ignition system uses an individual ignition coil for each cylinder. There are two separate ignition module assemblies located in the camshaft cover of each cylinder bank. Each ignition module assembly contains an ignition control module and four ignition coils. Each ignition coil connects directly to a spark plug using a boot. This arrangement eliminates the need for secondary ignition wires. The ignition module assemblies receive power from a fused ignition feed. Both ignition module assemblies connect to chassis ground. A Reference Low and four ignition control (IC) circuits connect each ignition module assembly to the PCM. The PCM uses the individual IC circuits to control coil sequencing and spark timing for each ignition coil. The IC circuits transmit timing pulses from the PCM to the ignition control module to trigger the ignition coil and fire the spark plug. The PCM controls ignition system sequencing and timing events

Dec 05, 2015 | 2001 Cadillac DeVille

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

2005 saturn ion 3 trouble code P0300


A P0300 code indicates random, multiple misfires were detected. You eliminated the possibility of ignition system faults by replacing the ignition module, the coils, and the spark plugs (unless the replacement part(s) were no good). However you did not mention the ignition wires which are another probable cause. In addition, there could be vacuum leaks due to damaged hoses or improper routing. Consider also fuel contamination or a problem with the fuel system.

Dec 24, 2013 | Cars & Trucks

1 Answer

Would a ingnition have any to do with the firing


It has everything to do with the firing. Ignition system consists of the computer, the crank and cam position sensors, the coils, spark plugs, ignition control module, the ignition switch, and the associated wiring.

If you have no fire (no spark), one would start by checking if ignition switch turning on causes the coil to receive battery voltage on the coil primary wire.
Always check for trouble codes when an engine problem develops. Codes stored in memory may have clues to why it won't start. If no codes are present and no spark (no ignition), suspect a bad crank position sensor (it can be tested by a shop), or possibly a bad ignition control module (also can be tested at a parts store for free).

Jan 23, 2013 | 1999 Chevrolet Silverado 1500

1 Answer

I have a 91 olds supreme 3.1 v6 it shut off and won't start back .... It starts but won't turn over.... And when turn the key back off it's blows the dis fuse wich mean direct ignition system...


Check the coils that have been replace for bent or broken prongs that plug into the ignition control module and if nothing looks damaged then i would think the ignition control module is faulty.Replace ignition control module.

Jan 21, 2012 | 1991 Oldsmobile Cutlass Supreme

1 Answer

Trouble with escalade


Vehicles: Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005 with Distributorless Ignition System

Normally I'd recommend that you check your ICM (Ignition Coil Module), but the ICM in this vehicle is an integral component of the PCM (Powertrain Control Module), and is not separately serviceable.

In the US, one can go to Advance Auto Parts/AutoZone/Pep Boys, and get a free "ignition system check" which will tell you whether your alternator/voltage regulator may be failing/marginal. Also, by disassembling your battery and carrying it into the store, you can get a free battery load test on their in-store tester.

Also, you'll want to get a free "Check Engine Light" test from Advance/AutoZone/Pep Boys, since that'll give any DTC (Diagnostic Trouble Codes) that the car's PCM may have stored. Once you have any DTC's stored by you car's computer, check the chart at the end of this solution for their interpretation - codes whose numbers exceed 1000 are Cadillac-specific codes. All of the included codes are stored in response to ignition coil faults.

These instructions apply whether your Escalade has a 5.3L or 6.0L engine.

Table of Contents:
Sec 1 - Adjustments - Ignition Timing
Sec 2 - Distributorless Ignition System - Description
Sec 3 - Ignition Coils - Removal and Installation
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SEC 1
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Adjustments - Ignition Timing

Ignition timing is preset and cannot be adjusted. Ignition timing is controlled by the Powertrain Control Module (PCM).

On V6 motors the distributor is located in a fixed, non-adjustable position. DO NOT attempt to rotate the distributor otherwise damage may result.

On V8 engines the distributor can be rotated for proper alignment of the rotor to the cap. The engine base timing is not adjustable by rotating the distributor.

The 4.3L, 5.0L, 5.7L and 7.4L engines use a distributor ignition system.

The 4.8L, 5.3L, 6.0L and 8.1L engines use a distributorless ignition system.
--------------------------------------------------------------------------------------------
SEC 2
--------------------------------------------------------------------------------------------
Distributorless Ignition System - Description


The 4.8L, 5.3L, 6.0L and 8.1L engines do not incorporate a distributor to deliver energy from a common coil to the individual spark plugs. The electronic ignition (EI) system is responsible for producing and controlling a high energy secondary spark. This spark is used to ignite the compressed air/fuel mixture at precisely the correct time. This provides optimal performance, fuel economy, and control of exhaust emissions.

This ignition system consists of a separate ignition coil connected to each spark plug by a short secondary wire. The driver modules within each coil assembly are commanded ON/OFF by the powertrain control module (PCM). The PCM primarily uses engine speed and position information from the crankshaft and camshaft position (CMP) sensors to control the sequence, dwell, and timing of the spark.

-----------------------------------------------------------------------------------------------
SEC 3
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Ignition Coils - Removal & Installation


The ignition coil module is integrated in the Powertrain Control Module (PCM). Individual replacement is not possible, the entire PCM would need to be replaced.

Ignition Coils - Removal & Installation

If equipped with Regular Production Option (RPO) HP2, disconnect the Energy Storage Box (ESB).

Remove the spark plug wire from the ignition coil.

Disconnect the ignition coil electrical connector.

If equipped with regular production option (RPO) HP2, remove the auxiliary heater water pump bracket bolts.


12_11_2011_1_47_26_am.jpg
Fig. 1 Removing the auxiliary heater water pump

Remove the auxiliary heater water pump from the studs, and reposition out of the way.

If equipped with RPO HP2, remove the starter/alternator control module (SGCM) cover bolts, and cover.

Remove the 3-phase cable nuts to the SGCM.

Remove the 3-phase cable from the SGCM.

Remove the 3-phase cable bracket nuts.

Remove the 3-phase cable bracket from the studs, and reposition the cable and bracket out of the way.


12_11_2011_1_50_00_am.jpg

Fig. 2 Starter/Alternator Control Module Electrical Connections

Remove the ignition coil bolts. (see image below)



12_11_2011_1_53_17_am.jpg

Fig. 3 Removing the ignition coil bolts

Remove the ignition coil.

To install:

Install the ignition coil.

Install the ignition coil bolts.
Tighten the bolts to 71 inch lbs. (8 Nm).

If equipped with RPO HP2, position the cable (w/bracket) and install the 3-phase cable bracket to the studs.
Install the 3-phase cable bracket nuts and tighten the nuts to 133 inch lbs. (15 Nm).

Install the 3-phase cable to the SGCM.

Install the 3-phase cable nuts to the SGCM and tighten the nuts to 80 inch lbs. (9 Nm).

Install the SGCM cover and bolts.

Tighten the bolts to 80 inch lbs. (9 Nm).


12_11_2011_1_55_48_am.jpg
Fig. 4 Starter/alternator control module electrical connections (again)

If equipped with RPO HP2, position the auxiliary heater water pump and install it onto the studs.
Install the auxiliary heater water pump bracket bolts and tighten the bolts to 133 inch lbs. (15 Nm).



12_11_2011_1_57_11_am.jpg
Fig 5 Removing the Auxiliary Heater Water Pump

Connect the ignition coil electrical connector.

Install the spark plug wire to the ignition coil.

If equipped with RPO HP2, connect the ESB

Testing

Connect scan tool to vehicle's Data Link Connector and follow scan tool instructions to download diagnostic Trouble Codes (DTCs) to the scan tool.

Diagnostic Trouble Code (DTC) list:

DTC P0351: Ignition Coil 1 Control Circuit
DTC P0352: Ignition Coil 2 Control Circuit
DTC P0353: Ignition Coil 3 Control Circuit
DTC P0354: Ignition Coil 4 Control Circuit
DTC P0355: Ignition Coil 5 Control Circuit
DTC P0356: Ignition Coil 6 Control Circuit
DTC P0357: Ignition Coil 7 Control Circuit
DTC P0358: Ignition Coil 8 Control Circuit
DTC P1351: Ignition Coil Control Circuit High Voltage
DTC P1361: Ignition Coil Control Circuit Low Voltage

If a DTC indicates an ignition coil is faulty before replacing the ignition coil check wiring for short circuits, broken or chafed wires, loose connections and corroded terminals.

Dec 08, 2011 | 2002 Cadillac Escalade

1 Answer

I have an 88 bronco 351w and im only getting have the voltage to my coil 6v. i recently replace the ignition control modual 2 weeks ago any ideas???


Ignition control module? There is a IDM , this module,trouble shoot this one instead. PCM uses IDM with the spout to verify coil signal from the TFI module. So basically you will need to inspect the TFI or replace and also check under the steering column there is the ignition switch (electrical switch), if that fails then you will get 6 volts to coil

Jun 01, 2011 | 1988 Ford Bronco

1 Answer

Codes p0351 miss and is goverened at 2800 rpms.


P0351 is Ignition Coil A Primary/Secondary Circuit Malfunction.
Possible causes: - Open or short in the ignition coil circuit - Ignition coil circuit shorted to ground - Ignition coil connector - Damaged ignition coil - Damaged PCM or
Possible solution - If damage, repair ignition coil circuit - Replaced ignition coil - Replaced PCM or ECM When is the code detected? The test fails when the Powertrain Control Module (PCM) or Electronic Control Module(ECM) does not receive a valid pulse signal from the ignition coil.
P0351 Description: The ignition signal from the Powertrain Control Module (PCM) or Electronic Control Module(ECM) is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.
Hope this helps :)

Mar 07, 2011 | 2002 Dodge Intrepid

2 Answers

1998 jeep cheeroke starter problem


Yes I believe that would fix the problem. It is under the hood mounted in the "power distribution box"


If this by slight chance doesn't work which I do think will work; Then you can try
The HEI system, used on 2.5L, 2.8L and 4.0L engines, is a pulse-triggered, transistorized controlled, inductive discharge ignition system. The entire HEI system (except for the ignition coil on fuel injected engines) is contained within the distributor cap.
The distributor, in addition to housing the mechanical and vacuum advance mechanisms, contains the electronic control module, and the magnetic triggering device. The magnetic pick-up assembly contains a permanent magnet, a pole piece with internal teeth, and a pick-up coil (not to be confused with the ignition coil).
In the HEI system, as in other electronic ignition systems, the breaker points have been replaced with an electronic switch-a transistor-which is located within the control module. This switching transistor performs the same function the points did in an conventional ignition system. It simply turns coil primary current on and off at the correct time. Essentially then, electronic and conventional ignition systems operate on the same principle.
The module which houses the switching transistor is controlled (turned on and off) by a magnetically generated impulse induced in the pick-up coil. When the teeth of the rotating timer align with the teeth of the pole piece, the induced voltage in the pick-up coil signals the electronic module to open the coil primary circuit. The primary current then decreases, and a high voltage is induced in the ignition coil secondary windings which is then directed through the rotor and high voltage leads (spark plug wires) to fire the spark plugs.
In essence then, the pick-up coil modu

Jan 20, 2009 | 1998 Jeep Cherokee

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