, Salem, MA


April 20, 2013

Dieseling getting worse in 1969 Jeep


A: You have already tried a few cures that I would have suggested. But getting back to basics, to run on, a car needs fuel and ignition. Most likely, your carburetor is leaking. Further, your intake manifold has a hot spot that is causing ignition. The carburetor will be an easy fix. The manifold can be purchased online or at any speed shop. With correct timing, proper point dwell and no vacuum leaks, this should cure your dieseling problem. I do agree with you on using the water — I did that for years back in the day. You may also want to check that your distributor is moving internally when you apply vacuum to the distributor advance port. If you need any help locating parts, shoot me an email, and I will be happy to assist.

Car care tip: Do you fear that your son or daughter may be involved in drinking and driving? Lives can be saved with a simple install of an ignition interlock device. Voluntary installs of this device are exempt from the Massachusetts $30-a-month administration fee. Anyone wanting more information can send an email to or visit the Massachusetts Registry of Motor Vehicles website.


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

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