Jump to content

Popping From Exhaust


Recommended Posts

I've had the 67 out for some fall drives and have noticed occasional popping coming from the exhaust. At first I thought it was some regular gas I put in by mistake, but it continues to pop and miss a bit. Not major, but annoying. It occurs more at low speeds than, say, above 60 or so. Do the Mikunis need adjusting? Any thoughts? What else could it be? Thanks.

Link to comment
Share on other sites

Carb adjustment

Check timing

Are you running points? Replace or clean them. If running Pertronix you're fine.

Check, clean or replace distributor cap.

Check, clean or replace rotor.

Check, plug wires, replace if you can't remember when they were replaced.


Check distributor for metal shavings around the shaft. If so buy an I.E. distributor or send yours to Advanced Distributors to be rebuilt and recurved.

Link to comment
Share on other sites

When exactly does it pop/backfire thru the exhaust?  If it does this when you are slowing, foot off the gas and car in gear, you probably need to look at the idle jets, as it sounds like you are a bit lean.  How far are the idle mixture screws turned out for a best idle. If more than two turns from closed you need to increase the size of the idle jets.  Went thru this exercise with the Mikuni 44s on my car.


74 02Lux

02 M Roadster

72 Volvo 1800ES


Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Upcoming Events

  • Create New...