SalemNews.com, Salem, MA

Business

June 7, 2014

Auto Scanner: Bad hood seal near windshield could lead to misfires

Q: I have a 2004 Chevy Blazer with a 4.3-liter engine, four-wheel-drive, with 201,000 miles. It runs like new, but there’s one minor problem: When I go on the highway or up a steep hill and push hard on the gas pedal, the engine knocks once and the service engine flashes, say 25 to 30 times, then goes off. It’s so awkward and started about six months ago.

A: Scanning the engine, you will probably find misfires on cylinders one, two, three and four. This is caused by water intrusion into the spark plug chamber at the spark boot. This water intrusion is caused by a bad hood seal near the windshield. GM does make a new seal as part of a technical service bulletin. You will need to replace the plugs and coil ends if they are contaminated.

Q: I read your column every week in The Salem News, even though I depend on the dealer where I purchased my car. I would like to have you put in the date code for tires and explain how to read it.

A: On the side of the tire, you will see numbers that look like they were branded on with an old-fashioned branding iron. Since the year 2000, the week and year that the tire was produced have been provided by the last four digits of the tire identification number, with the two digits being used to identify the week immediately preceding the two digits used to identify the year. For instance, if the stamp reads something like FLRR 5007, that means FLRR is the manufacturing plant, 50 is the 50th week, and 07 represents 2007. So, this tire was built at the plant designated FLRR, during the second week of December in 2007. I hope this helps.

Q: I’m looking for help with my 2005 Hyundai Santa Fe with 116,000 miles. It started having a problem about a month ago. Whenever I get fuel, the car starts hard right after fueling. It acts like it lost its prime. It needs several starts to keep the engine running. Other than these times, the car starts and idles just fine. I don’t let the gas tank get below half. It doesn’t matter whether I fill the tank or put in $20 or so to get it to three-quarters. No check-engine light. Yesterday, it took several tries to keep the engine running. The car ran only a few minutes to home and something else occurred; it wouldn’t shut off when the ignition turned off. I quickly flipped the switch back on, let the car idle for a couple of minutes and then tried again — the engine stopped right away. No fumes, no black exhaust smoke, no rough idling, no hard starts at other times — just when I put in fuel. Could a leak in the evap system have anything to do with this?

A: The problem is an open check valve (purge valve) at the fuel tank. Scanning the system with a bidirectional scanner will reveal this problem.

---

Larry Rubenstein is a master technician who owns a North Shore service station. His column appears every Saturday. Write to Larry at The Salem News, c/o Auto Scanner, 32 Dunham Road, Beverly, MA 01915, or send an email to scanauto@aol.com.

1
Text Only | Photo Reprints
Business

AP Video
US Stocks Plunge, Wiping Out July's Gains Looming Demand Could Undercut Flight Safety Six Indicted in StubHub Hacking Scheme Trump: DC Hotel Will Be Among World's Best AP Review: Amazon Fire Adds Spark to Smartphones All Aboard! LIRR Strike Averted Microsoft to Cut Up to 18,000 Jobs Time Warner Rejects Murdoch's Takeover Bid Yellen Says Economy Still Needs Fed Support Cleveland Expects Economic Boom From Lebron Justice Dept. Fines Citigroup $7 Billion Justice Dept. Fines Citigroup $7 Billion Downside of Low Mortgage Rates? Less Selling Cupcake Shop Crumbs Shuttering All Its Stores San Francisco Prepares for Soda Battle Dow Breaks Record 17,000
NDN Video
Famous Internet Cats Help Big Cause With Viral Video Raw: Obama Gets Hug From Special Olympian Snoop Dogg Narrating Animal Footage Is Perfect Tigers Acquire David Price - @TheBuzzeronFOX Russell Brand Slams Sean Hannity Over Gaza Conflict Segment Chapter Two: Composing for a film in retirement Woman's Dive Goes Terribly Wrong Brian Williams Reports on Daughter Allison Williams' 'Peter Pan' Casting News Did Jimmy Fallon Look Up Heidi Klum's Dress? What Drama? Miranda Kerr Poses Topless Plane crashes in San Diego Costco parking lot Justin Bieber Takes To Instagram To Diss Orlando Bloom You Won't Believe the Celeb Cameos in "Sharknado 2" Pitch Invading Morons Cause Chaos - @TheBuzzeronFOX Orlando Bloom 'Takes a Swing' at Justin Bieber In Ibiza Sadie Doesn't Want Her Brother to Grow Up "Maxim" Hotness! See Jessica Alba's Sizzling Spread Two women barely avoid being hit by train Broken Water Main Floods UCLA Orlando Bloom and Justin Bieber Reportedly Came To Blows In Ibiza
Comments Trcker