, Salem, MA


April 20, 2013

Dieseling getting worse in 1969 Jeep

Q: Please allow me to ask your assistance with an engine problem. A solution could save me some time and expense. I hope you find it interesting. The truck is a 1969 Jeep J2000 with the factory-installed Buick 350 V8 engine. I use it around my small farm doing chores. It has idled a lot picking up brush and other chores where you jump out, do something for a minute, jump back in move forward, over and over. It is not registered for the road and also has some body corrosion. It could not pass inspection. I have used the truck for 20 years, and it gradually developed dieseling when turning off the ignition. We use octane booster and buy 89/93 octane gasoline (it has helped a lot). The dieseling is getting worse. When I turn off the ignition, it will run for 30 seconds, sometimes more, and finally runs backward and blasts back through the carburetor.

The following has been done to try to correct the problem: Put in 160 thermostat (helps — if temperature goes over 160 degrees, dieseling is much worse; below 160, Jeep acts almost normal); put in a new timing chain (small change); tried changing the timing per distributor (no change or worse); sprayed water into carb to loosen cylinder carbon (helps some ,only temporarily) sprayed in 3 quarts of sea foam when running, smoked out the yard and let it sit overnight (no change at all — water did better). The two-barrel carburetor has original jets and runs on the rich side. I put in colder spark plugs, but there was no change. There is something hot in the combustion chamber/chambers that is igniting the fuel, carbon or hot metal. Can you suggest a solution or a reason for this? I plugged cooling; the coolant is always clean, but there are mineral deposits in the radiator. I heard you at one point say Cadillac has some carbon-removing solution at the dealerships used in the North Star engine. I would appreciate your help.

Text Only | Photo Reprints

AP Video
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 GM Crash Compensation Could Top $1 Billion GM Won't Limit Crash Compensation Funds
NDN Video
Big Weekend For Atlanta Braves In Cooperstown - @TheBuzzeronFox Chapter Two: Becoming a first-time director What's Got Jack Black Freaking Out at Comic-Con? Doctors Remove 232 Teeth From Teen's Mouth Bradley Cooper Explains His Voice in 'Guardians of the Galaxy' Deja vu: Another NYPD officer choke-holding a suspect 'Fifty Shades of Grey': Watch the Super Sexy First Trailer Now! Reports: Ravens RB Ray Rice Suspended For 1st 2 Games Of The Season Air Algerie plane with 119 on board missing over Mali Diamond Stone, Malik Newman, Josh Jackson and others showcase talent Free Arturo - The World's Saddest Polar Bear A Look Back at Batman On Film Through The Years LeBron James -- Dropped $2k On Cupcake Apology ... Proceeds To Benefit Charity Snoop Dogg Says He Smoked Weed at the White House Raw: Fight Breaks Out in Ukraine Parliament Chris Pratt Interrupts Interview To French Braid Intern's Hair Shirtless Super Mario Balotelli Dances While Ironing - @TheBuzzeronFOX Whoa! Watch "Housewives" Star Do the Unthinkable LeBron apologizes to neighbors with cupcakes Justin Bieber In Calvin Klein Underwear Shoot
Comments Trcker