How to Tune Standalone ECUs for Smooth Idle
The idle control settings are not the most important thing to adjust to get a smooth idle. This may seem counter-intuitive, but consider this: If the engine is idling at constant load with the throttle held at a constant opening, shouldn’t you have a constant idle speed? If your idle surges or hunts under these
Cylinder Block Oil Leaks Found on Some 1995-2002 Honda V6 Engines
Vehicles affected: 1995-2002 Passport, 1995-2010 Accord,1999-2010 Odyssey, 2003-’10 Pilot, 2006-’10 Ridgeline, 2010 Accord Crosstour(with V6 engine) Each side of the engine block has four main bearing cap sidebolts (see Figure 1) that hold the bearing caps to the side of the engineblock. The bolt threads, however, aren’t sealed at the factory, so sometimesengine oil can
Identifying Ford 4.6L Engine Front Covers
The first cover we’ll discuss is used on the 2001-2004 Van, 2002Expedition and 2002-2004 Ford F-150. It is Ford p/n 2L3Z-6019-AA.Before I mention the cover, I must remind you that 2004 was atransitional year for Ford, and the 2004 F-150 is the Heritage bodystyle. You need to pay attention to that or you will end
Cold Weather Caution: Crank No Start, Rough Idle or Misfire due to Compression Loss
Models affected: 2000-2009 All GM Passenger Cars with Gasoline Engines 2000-2009 All GM Light Duty Trucks with Gasoline Engines Condition/Concern: Crank no start when cold. The engine may crank over very fast, as if there is low/no compression. It may also run rough for up to 5 minutes after starting the engine and may exhibit
Tips For Selecting The Proper Circle Track Cam
This isn’t always your fault, but this is often followed by the racer selling the cam to a fellow racer who thinks it’s the best cam he ever ran. Why did this cam work so well for one racer and not for another? The reasons can be many. The following are some tips for selecting
Besides Octane, What Else Should You Consider When Selecting a Race Fuel?
It’s entirely possible to generate more horsepower with a lower octane fuel if it’s designed properly with respect to its other key properties. It’s also possible for two fuels to have the same octane rating, but perform very differently due to their other key properties.?? 1. OCTANE: Octane is simply a rating of a fuel’s ability to
Piston Ring Selection In Chrome Plated Cylinders
It is recommended that chrome plated rings not be installed in chrome plated liners under any circumstances. Catastrophic destruction will likely result. Plain cast iron-manganese phosphate coated, or molybdenum rings may be used. It is normally difficult to detect visually in a used cylinder if it is chrome plated or not. If any doubt exists,
Measuring Wall Thickness of Main and Rod Bearings
To measure the wall thickness of a main or rod bearing correctly thelocation on the bearing that you measure and the tool you use willdetermine the level of accuracy of the measurement. A micrometer with aball anvil must be used to fit the curvature of the bearing I.D., asshown in Figure 1. Standard flat anvil
Coolant Leaks, Head Gasket Issues on Toyota 2.2L Engines
Depending on the production date code of the engine stamped on the front of the cylinder head, two types of head gaskets are used. Use a composite-type gasket (p/n 11115-74081) if engine number is lower than 5985000. Use an MLS (multi-layer steel) gasket (p/n 11115-74120) if the engine number is 5985000 or higher. It is
Timing Chain Tensioner Installation Caution on GM 2.3L Quad 4
The timing chain tensioner on GM’s 2.3L "Quad 4" engine is of the spring loaded ratchet design. The tensioner assembly consists of a housing, spring, and ratcheting plunger. The plunger is locked into the housing and plunger to prevent the accidental release of the spring before or during installation. Once the tensioner is installed and
Cadillac 4.6L DOHC Cylinder Head and Block Cautions
The problem is cracking of the aluminum block casting around the cast iron liner (Figure 1). Knowing that this possibility exists, I strongly suggest that you take the time to make a close examination of the deck prior to doing any machining at all – and before you then spend numerous hours installing cylinder head