Tech Tip: Coil-On-Plug Misfire Diagnostic Tips for Ford/Lincoln/Mercury Engines
The misfiring cylinder must be identified through Self-Test misfire codes or through WDS Power Balance. Rule out base engine problems; rule out fuel problems; and then look at ignition problems (be sure to rule out coil primary circuit issues).
‘Exploring’ Service Needs On The Ford 4.0L V6 Engine
Rated at a rather anemic 210 horsepower, the 4.0L SOHC V6 is not exactly a high output engine. It also has an unusual overhead cam drive setup. Unlike most other OHC V6 and V8 engines that drive both overhead cams directly from the crankshaft with a belt or chain, this engine has an intermediate jackshaft in the middle of the block where a pushrod cam would normally be located.
Tuning In To The EFI Market
There are many variables that need to be calculated and calibrated when it comes to electronic fuel injection (EFI), but simple fuel flow is just the beginning. EFI goes far beyond a replacement for a carburetor, and the electronic part of the equation is where these systems seem so complicated. Many EFI systems give you the ability to control a wide range of parameters of the vehicle, so it’s more involved than simply controlling fuel flow.
Tech Talk: Biomass or Bio Mess?
Addressing the issues associated with ‘Home Brewed’ Bio-Diesel
Tech Tip: Honda Suffers From Hard Start/Long Crank Time
If a an owner of a 2003-’04 Honda Accord complains their vehicle is experiencing excessive cranking or hard starting, there are two possible causes – contamination in the fuel pressure regulator or exhaust gas backflow into the intake manifold at engine shutdown.
Diagnosing Fuel Pumps Using Voltage Drops And Current Testing
Some of the best diagnostic tests for fuel pumps are voltage drops and current testing. Fuel pressure and volume are influenced by voltage, current and the demand controlled by the regulator. If a fuel pump is not receiving the correct voltage, it cannot spin fast enough. Voltage drop testing can isolate problems that can still remain even if the pump is replaced.
TechSmart Announces Winter 2013 Line Expansion
Standard Motor Products (SMP) has expanded its TechSmart line of enhanced engine control products for professional service technicians by adding 55 new premium parts.
2014 Corvette LT1: The Engine Under the Hood
The art and science behind its combustion system makes the Corvette LT1 one of the most advanced V8 engines in the world.
Fuel For Thought: A Study On The Causes Of Foul Fuel
In this study on the causes for foul fuel finding its way into your customer’s vehicle tank, we find that there are normally three reasons – refinery mistakes, poor
Ford Tech Tip: Cackling Powerstroke Injector
Some Ford diesel vehicles with the 7.3L engine may experience a misfire or “cackle.” The injectors in the 7.3L diesel run off of the high-pressure engine oil pump.The #8 injector is the farthest away from the oil pump, causing a filling problem, which may result in a misfire. Ford replaced the #8 injector in some vehicles as needed with a different injector to solve the problem.
Tech Feature: Diagnosing Diesel Injector Problems
Injectors can fail in ways other than becoming just worn out or tired. Diesel guru Bob McDonald discusses common and not so common injector fails.
Diagnostic Dilemmas: Multiple Failure Diagnostics On High Mileage Engines
Gary Goms explains that in tough economic times, a driver has no way of knowing how many maintenance-based and component-based failures will accumulate before he or she can afford to have a technician investigate the problem once a Check Engine light comes on.