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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More
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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More
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 ...
Read More
Read More
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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More
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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More
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 ...
Read More
Read More

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 ...
Read More
Read More
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 ...
Read More
Read More

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 ...
Read More
Read More
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 ...
Read More
Read More
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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More

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 ...
Read More
Read More