Misfire Case Studies
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 ...
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 ...
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 ...
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 ...
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’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’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 ...
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 ...
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’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 ...
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
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 ...
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 ...
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 ...
