Misfire Case Studies

tech_2_cam_retard_chevy_5.7

Misfire | 1999 Chevrolet 3500 Express Van | 5.7

Chevy V8 Misfire Caused by Excessive Cam Retard This Chevy 1 Ton Van came in for an intermittent misfire complaint. The misfire ...
1996 Chevrolet Cam & Crank Alignment

Poor Idle | 1996 Chevrolet Corsica 2.2 | Crank & Cam Alignment

Having the internet is a great resource for anything you want or need to know. As an automobile technician it ...
2000 Lincoln LS Engine

Misfire | 2000 Lincoln LS | COP Coil Testing

How many times have you tried to find the misfiring cylinder on a Ford COP (Coil On Plug) ignition system ...
3.8 | Crank Sensor Signal

Dead Coil | 1994 Oldsmobile Delta 88 Royale | 3.8

Crank Sensor Causing Coil Not to Fire This 1994 Oldsmobile Delta 88 Royale 3.8 liter had many issues but I was ...

Misfire | 1998 Chevrolet Malibu | 3.1

Using Data PIDs to Diagnose Stuck Open EGR Valve on a 3.1 Have you ever had a car come in ...

Lean Condition | 2003 Chevrolet Tahoe | 5.3

Cold Start-Up Misfires - 2003 Chevrolet Tahoe  5.3 This case study will involve a couple different and effective ways that I ...
1996 4.3 Worn Distributor Bushing

Misfire Under Light Load 2000 – 2500 RPM| 1996 Chevrolet Blazer | 4.3

Misfire Caused by Distributor Bushing Failure This case study is on a 1996 Chevrolet Blazer with a 4.3 V6. The ...

3000 RPM Rev Limiter, Mysterious Issues | 2003 Lincoln LS | 3.9

Intermittent Electronic Throttle Control (ETC) Safety Mode While Driving We have all been dealing with gasoline engine ignition misfires since ...

Misfire | 1995 Chrysler Town & Country | 3.8

Upside Down Crank Sensor Pattern Causes Misfiring Engine Over 2000 RPM This case study is on a 1995 Chrysler Town ...

Misfire | 1999 GMC Safari Van | 4.3

Defective New Crank Sensor Produces Tiny Signal Glitch and Causes Misfires My first case study is on a 1999 GMC Safari ...

No Start Case Studies

Intermittent No Start, No Communication, Flashing Theft Light | 2010 Ford F250 | 6.4 Powerstroke Diesel

Intermittent Network Communication Problem - Diagnostic Deduction Customer Concern Vehicle was dropped from a  hoist and now has a intermittent ...

No Start, No Spark | 1997 Chrysler Sebring | 2.5

No Spark Caused by a Shorted Ignition Coil  This 1997 Chrysler Sebring with a 2.5 liter came in as a ...

No Start, No Fuel Pump | 1997 Oldmobile Bravada | 4.3

Missing 12 Volt Power from Burnt Ignition Switch This 1997 Oldsmobile Bravada came in as a no start. Turn the ...

No Start, Theft Issue? | 1992 Cadillac Eldorado

This case study took an unexpected turn that could only happen in certain areas of the country. The vehicle in this ...
GM Key Lock Cylinder Tumblers Disassembled

GM’s Theft Code B2960 | Key Code Incorrect but Valid

General Motor's Theft No Crank/No Start Security Relearn I am sure many of you have had a GM towed in ...

Fuel Trim Control

Lean Condition | 2003 Chevrolet Tahoe | 5.3

Cold Start-Up Misfires - 2003 Chevrolet Tahoe  5.3 This case study will involve a couple different and effective ways that I ...

Theft & Security

Intermittent No Start, No Communication, Flashing Theft Light | 2010 Ford F250 | 6.4 Powerstroke Diesel

Intermittent Network Communication Problem - Diagnostic Deduction Customer Concern Vehicle was dropped from a  hoist and now has a intermittent ...

No Start, Theft Issue? | 1992 Cadillac Eldorado

This case study took an unexpected turn that could only happen in certain areas of the country. The vehicle in this ...
GM Key Lock Cylinder Tumblers Disassembled

GM’s Theft Code B2960 | Key Code Incorrect but Valid

General Motor's Theft No Crank/No Start Security Relearn I am sure many of you have had a GM towed in ...

Electrical

Intermittent No Blower Motor Operation | 2005 Chevrolet Impala | 3.8

No Heat and It Is -10 Below Zero in Wisconsin Customer Concern Vehicle has no heat from air ducts. The ...

Intermittent No Start, No Communication, Flashing Theft Light | 2010 Ford F250 | 6.4 Powerstroke Diesel

Intermittent Network Communication Problem - Diagnostic Deduction Customer Concern Vehicle was dropped from a  hoist and now has a intermittent ...
Chevy Trailblazer Defective Ignition Switch

Intermittent Electrical Issue | 2004 Chevrolet Trailblazer

Intermittent Bad Ignition Switch Causes Low Power and No Blower Motor This 2004 Chevy Trailblazer came in with multiple concerns ...
1996 Chevy Blazer 4wd Module Scope Pattern

4WD Issue | 1996 Chevrolet Blazer

Intermittent 4WD Module Problem - 1996 Chevrolet Blazer This case study will be pretty short and is just a nice example ...

Interior Electrical Issues | 1997 Buick LeSabre

Lighting Problems Caused by Common Body Control Module Corrosion This case study is about a 1997 Buick LeSabre that has a ...

Parasitic Battery Draw | 1990 Ford F150

This 1990 Ford F-150 had a parasitic draw that was draining the battery. The first step I take in finding ...

Shift Issue | 1993 Chevrolet Lumina | 4T60E

New Transmission Not Wired the Same as the Old This 1993 Chevrolet Lumina came in with a transmission shifting complaint ...

No Start, No Fuel Pump | 1997 Oldmobile Bravada | 4.3

Missing 12 Volt Power from Burnt Ignition Switch This 1997 Oldsmobile Bravada came in as a no start. Turn the ...

No Start, Theft Issue? | 1992 Cadillac Eldorado

This case study took an unexpected turn that could only happen in certain areas of the country. The vehicle in this ...

3000 RPM Rev Limiter, Mysterious Issues | 2003 Lincoln LS | 3.9

Intermittent Electronic Throttle Control (ETC) Safety Mode While Driving We have all been dealing with gasoline engine ignition misfires since ...
GM Key Lock Cylinder Tumblers Disassembled

GM’s Theft Code B2960 | Key Code Incorrect but Valid

General Motor's Theft No Crank/No Start Security Relearn I am sure many of you have had a GM towed in ...

Communication & Networks

Intermittent No Start, No Communication, Flashing Theft Light | 2010 Ford F250 | 6.4 Powerstroke Diesel

Intermittent Network Communication Problem - Diagnostic Deduction Customer Concern Vehicle was dropped from a  hoist and now has a intermittent ...

Airbag Light | 1996 Pontiac Grand Am | No Communication

No Airbag Module Communication - 1996 Pontiac Grand Am This will be a quick and to the point case study. This ...

Diesel

Intermittent No Start, No Communication, Flashing Theft Light | 2010 Ford F250 | 6.4 Powerstroke Diesel

Intermittent Network Communication Problem - Diagnostic Deduction Customer Concern Vehicle was dropped from a  hoist and now has a intermittent ...
Dodge Diesel | Plugged Cummins Airfilter

No Power | 2005 Dodge Ram 2500 | 5.9 Cummins Diesel

Cummins Diesel With No Power - 2005 Dodge Ram 2500 Customer complaint was severe lack of power and performance on this ...

 

Transmission

Shift Issue | 1993 Chevrolet Lumina | 4T60E

New Transmission Not Wired the Same as the Old This 1993 Chevrolet Lumina came in with a transmission shifting complaint ...

Other Diagnostic

Very Few Plugged Fuel Filters Cause Problems

Automotive Fuel Filter Driveability Problems

Fuel Filters Rarely Cause Driveability Problems This is not really a case study but more of a thought of mine ...
1996 Chevrolet Cam & Crank Alignment

Poor Idle | 1996 Chevrolet Corsica 2.2 | Crank & Cam Alignment

Having the internet is a great resource for anything you want or need to know. As an automobile technician it ...
Dodge Diesel | Plugged Cummins Airfilter

No Power | 2005 Dodge Ram 2500 | 5.9 Cummins Diesel

Cummins Diesel With No Power - 2005 Dodge Ram 2500 Customer complaint was severe lack of power and performance on this ...

Rough Running | 1992 Toyota Celica

Every once in awhile you get a vehicle that has had too many hands working on it. This 1992 Toyota Celica ...

3000 RPM Rev Limiter, Mysterious Issues | 2003 Lincoln LS | 3.9

Intermittent Electronic Throttle Control (ETC) Safety Mode While Driving We have all been dealing with gasoline engine ignition misfires since ...

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