Question about Dodge Ram 250

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Ignition coil has failed 3x in the last month. is there a way I can bypass it just to get home, stranded in the middle of nowhere. . .

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No way no how

Posted on Mar 17, 2011

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I recently replaced the coils the icm cam sensor and crank sensor and still getting a p1350 code on my 94 lesabre . how can i fix this please?.?


DTC P1350 Bypass Line Monitor
Refer to Ignition Control, Knock Sensors .

Circuit Description
The Ignition Control Module (ICM) sends signals that the PCM requires for fuel control and spark advance calculations. At the start of engine crank, the ICM controls spark advance (Bypass mode.) When the second 3X reference pulse is recognized by the PCM, the PCM applies 5 volts to the Bypass circuit, commanding the ICM to switch spark advance to PCM control (IC mode). An open in the IC circuit or a short to voltage in the Bypass circuit at startup will cause the PCM to monitor IC pulses during crank, when the ICM should be grounding the IC circuit. This condition will set DTC P1350. The engine may be started but will run on Bypass mode timing.

Conditions for Setting the DTC
The PCM monitors IC pulses during crank while Bypass mode spark advance is commanded

Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame and Failure Records data.
Conditions for Clearing the MIL/DTC
The PCM will turn OFF the MIL during the third consecutive trip in which the diagnostic has been run and passed.
The History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool.
Diagnostic Aids
Check for the following conditions:

Poor connection at the PCM. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
Damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, disconnect the ICM, turn the ignition ON and observe a digital multimeter connected between the IC circuit and B+ while moving connectors and wiring harnesses related to the ICM. A change in voltage will indicate the location of the malfunction.
Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.

This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.

Oct 14, 2016 | Cars & Trucks

1 Answer

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

2 Answers

Why do new spark plug coils go bad ?


coils, it has just one coil pack. with 3 coils integrated.
its not COPs.
there are many DTCs related, and not posted.
did you try new spark plugs, then new wires. and then only last the coil pack? check compression.
is it failing the same cylinder? (the will fail in pairs, if the pack is bad)
the pack runs 2 cylinders at once (in series)
injectors leaking or clogged.
since you didnt show the symptoms, i cant help much.


how.?
1 month or 1 year?, or how many miles?
answer 1
time, heat,vibration, oil contamination. (pressure washing them)
not using the dielectric grease on the boots.
getting water in the wells over and over, causing flash over , and carbon tracking.
what make you think they are bad.???
my guess, is you see P03xx codes and assume the means bad coil.?
post symptoms.
post scan data, and DTCs.

May 21, 2014 | Jeep Cars & Trucks

1 Answer

No spark on one igniton coil of 2000 Lesabre buick


Hi Glen, If the problem persists after replacing the coil I believe you must look at the cables for an internal broken circuit. Also check the ground connection. If all else fails check the computer. Regards John

Jul 22, 2012 | 2000 Buick LeSabre

1 Answer

2003 ford taurus heater fan worked fine last night but won't come on at all today.


I do not understand why people will continue to operate a vehicle when they know there is an obvious problem. They ignore check engine lights until the engine stops running altogether and then are "surprised" when they get stranded in the middle of the expressway in rush hour traffic. Then they blame it on the car!!!

In your case, you have ignored the warning signs of your blower motor failing ("making noise for a couple months"?) and now you are dumfounded as to why your blower motor now does not work at all.....I don't get it....!???

REPLACE YOUR BLOWER MOTOR!

Dec 26, 2011 | 2003 Ford Taurus

1 Answer

1986 Honda civic Si dies when taking off from start once it gets to operating temperature why does it do this?


Check the coil, any parts store can bench test the unit for free no charge, if that is not the issue than more likely it will be the Distributor unit, and its common cause for older civics with high miles. EBay is the best place getting replacement parts for about 100 bucks, just make sure you get the correct distributor, the model number will be on the distributor. If that is the original distributor unit and never been replaced and it has high miles, I recommend you change the unit out, other wise you taking a chance quiting on you when least unsuspected stranded in the middle of nowhere.

Jun 28, 2011 | Honda Civic Cars & Trucks

1 Answer

I was wondering if on a 1996 saturn sl2 crankshaft pulley should wobble at all


NOO..The bearing is shot. Get a new one before you're stranded in the middle of nowhere with a huge towing bill($30 bucks now or $150 later)

Feb 28, 2010 | Saturn SL2 Cars & Trucks

1 Answer

Ignition doesn't always roll over


check the ignition control module or coil
connection to the starter motor or battery or
spark plug wire

Aug 10, 2009 | 2000 Oldsmobile Alero

2 Answers

Car won't start occasionally, leaving me stranded.


Here is a great DIY write-up on how to bypass VATS completely. This is what saved my car! It's quite easy to do: http://newrockies.ca/vatsbypass

Nov 22, 2008 | 1994 Oldsmobile Cutlass Supreme

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