As described by a written note left in their vehicle, the symptoms included “drives rough — jumpy — all the time, worse when wet.” They went on to describe them further by writing “does sometimes cut out when stopped. Not running on all cylinders. Spark plugs replaced 2 months ago — problem is worse.”
Many OEMs are still using the MAF (Mass Airflow) sensor as their primary means of measuring the air entering the engine. Knowing how it does its job makes it easier to know when it isn’t doing its job.
Have you ever heard the saying "Fool me once, shame on you. Fool me twice, shame on me?" or "Sometimes I'm my own worst enemy?" I had reason recently to have to use each saying while working on a 2004 Cadillac CTS (DM).
This Ford pickup had been around from shop to shop, even making appearances at a local dealership. The initial complaint seemed simple enough: no start, no communication and no odometer. Then why did the dealer technician toss his hands up in surrender after a month and a half without a solution? It's all about a testing method we've preached about before - voltage drop!
It’s time to introduce your customers to absorbent glass mat (AGM) batteries. These advanced lead acid batteries feature an absorbent glass mat separator, which helps this type of product offer better performance than other lead acid batteries.
Certified Technician is the newsletter for automotive repair professionals. Get the latest news, tech tips and diagnostic techniques delivered straight to your in box. Sign up today! Published every Monday and Thursday.