Performance Archives - Page 7 of 7 - UnderhoodService
Tech Tip: Diagnosing and Repairing Honda When MIL Comes On

The MIL comes on with one or more of these evaporative DTCs stored: P0451 (FTP sensor circuit range/performance problem); P0452 (FTP sensor circuit low voltage); P0453 (FTP sensor circuit high voltage); P1454 (FTP sensor circuit range/performance problem).

Tech Feature: Northstar Supernova

Introduced in 1993, GM’s 4.6L 32-valve dual overhead cam all-aluminum V8 engine – housed in the Cadillac Allante, Eldorado and Seville STS – was considered a quantum leap forward for U.S. automakers. Initially rated at 295 horsepower, the Northstar V8 has grown over the years to an incredible 469 hp at 6,400 rpm (STS-V Supercharged Northstar engine).

Tool Tip: Intermittent Chuggle/No DTCs Set

Some customers may comment on an intermittent chuggle or fishbite on light acceleration or at steady-state highway speeds (typically 50-65 mph) with no PCM DTCs set. This condition may lead the technician to suspect the TCC circuit or torque converter. This condition may be caused by intermittent operation of the Throttle Position (TPS) Sensor.

Z Sport, Part 2: Powering Subaru WRX Engine & Chassis Upgrades

A few months back, I highlighted a project car being built by Z Sport. The car is now back together and running. Charles Damewood, the car’s owner and a principle at Z Sport, has been driving the car to break in the engine, and get an idea of what needs to be sorted out as far as engine management before doing a full on dynamometer test. As soon as fuel mapping and software issues are resolved, we will get full performance testing data and publish a follow up.

Pennzoil Introduces its Most Advanced Synthetic – Pennzoil Ultra

New Hyper Cleansing Technology keeps engines closer to “factory clean” to help consumers protect their vehicle investment and increase engine efficiency.

2009 NASCAR Stars Honored During Champions Week

A total of 14 highly coveted year-end special awards were presented at the annual NASCAR NMPA Myers Brothers Awards Ceremony on Dec. 3.

Tech Feature: Boosting Profits Through Turbocharger Services

A turbo’s basic purpose is to boost power, so when an otherwise healthy engine suddenly becomes anemic, it often (but not always) means turbo trouble.