Exhaust Archives - Page 11 of 19 - UnderhoodService
Service Solutions: The ‘CKP’ Script

The signal of the position or rotation speed of the crankshaft position sensor (CKP) contains a lot of information about the engine. When the engine is operating, the engine cylinders push on the crankshaft journal. This is why the crankshaft briefly accelerates after top dead center (TDC) on the expansion (or combustion) stroke. If the fuel did not ignite in the cylinder there would no acceleration.

Gonzo’s Toolbox: Problem ‘On’ The ‘In’-Side

The tow truck came around the corner of my shop with a 2003 Focus strapped down on the bed. It’s Stacey’s daughter’s car. Stacey is the office manager at the body shop just down the street. Her daughter’s little Ford had given up at a stop sign. Now it was up to me to find out what’s going on with it.

Eastern Catalytic Launches New ECO Carb and Full Line Catalytic Converter Catalogs and Enhances Online Access

Eastern Catalytic has just released two new product catalogs – a 56-page ECO CARB Converter Catalog and a 362-page Full Line Catalog.

Diagnostic Solutions: The Relationship Between PCMs, Sensors and Actuators

Not that I recommend installing used PCMs, but I occasionally need a rebuildable core to replace a missing or badly damaged powertrain control module (PCM). But lately, I’ve noticed that it’s becoming increasingly difficult to find a used PCM for an older import at a local auto salvage yard. While it’s sheer speculation on my part, this apparent shortage of PCM cores might be caused by too many poorly trained technicians replacing PCMs to solve sensor-based problems. In most of these cases, the problem remains unsolved even as the original and fully functional PCM is casually tossed into the trash when the tech moves on to another job.

Tech Tip: Hyundai Has Check Engine Light On with Fuel System Lean Code

The check engine light is on with a post catalyst fuel system lean code P2096, an oxygen (O2) sensor stuck lean B1/S2 code P2270, and an O2 sensor no activity B1/S2 code P0140.

Bosch Named Exclusive NASCAR Performance Partner, Oxygen Sensor Supplier for NASCAR Fuel Injected Engines

Bosch developed and introduced the automotive oxygen sensor in 1976, and as NASCAR makes the switch from carburetion to fuel injection in 2012, Bosch will be its exclusive oxygen sensor supplier.

Pulling Codes: The Story of Codes P1128 and P1129

It was Saturday, June 11, 2011, at 8:30 in the morning. I had just arrived at an automotive repair facility located in Merriville, IN, owned by a very good friend of mine. The reason for my visit that morning was the challenge of a 2008 Chrysler 300 VIN Code R with a 2.7L engine. This vehicle appeared to operate properly until it reached cruising speed, and then once cruising speed was obtained, the vehicle would actually hiccup and set a pending code for P1128 and P1129. This hiccup could more accurately be defined as a “fishbite” reaction that was felt at cruising speed.

Tech Tip: Chrysler Vehicle (300/Magnum/Charger) Has Multiple DTCs Set, MIL Illuminated

This bulletin involves repositioning the upstream oxygen (O2) sensor connectors and replacing the wiring harness connector(s) and O2 sensor(s) as necessary.

Thieves Stealing Catalytic Converters from Repair Shops

Shop owners in Toledo, OH, have seen an increase in the number of catalytic converters that are being stolen from vehicles in their parking lots. They are hoping that surveillance video will help the police catch the thieves.

Diagnostic Dilemmas: The Diagnostic Tail Gunner – Surviving in the Age of Information

One of the first survival skills my professor taught is called “preparatory set,” which is simply the act of preparing to do something. Each of us engages in preparatory set when we open our toolboxes each morning. The very act of opening our toolbox signals to our mind that we’re ready to go to work and deal with the day’s issues.

Diagnostic Solutions: Exhaust Restriction Diagnosis

To put exhaust restriction diagnostics in perspective, import specialist shops have been dealing with loss-of-power complaints caused by exhaust restriction since catalytic converters were popularly introduced in 1974. Early “cats” experienced frequent failure because the carbureted engines of that era were notorious for poor fuel control.

Tech Feature: Kia Driveability Diagnostics

We’ll be taking a look at the Kia line of cars and SUVs this month with an eye toward driveability issues and check engine light concerns. My first point is that there should be no trepidation when a Kia finds its way to your bay. Kias enjoy a solid dealer network, good parts availability and a no-charge website for repair information so there is no reason that you shouldn’t welcome them into your shop.