[Healeys] Backfire in rebuilt engine with less than 500 miles

[Kees Oudesluijs]

Some parts like i.e. the distributor or carbs are taken of the engine 
when it is rebuild and then after having lain on the shelf for months or 
even years are put back on the engine the way they came off, without 
resetting or cleaning.

In the distributor are the bob weights inside the body that regulate the 
mechanical advance. These need regular maintenance (mostly forgotten) to 
prevent them from corrosion and sticking. It is not seldom that these 
get stuck or do not move freely which might be a cause for backfiring. 
Also check the plugs and wires.

If the car is still on points check the dwell angle and points 
condition. Also check the timing.


Kees Oudesluijs




Op 25-1-2021 om 15:57 schreef rfbegani at gmail.com:
>
> Listeners:
>
> I have been driving my 67 BJ8 since rebuilding and working on the rest 
> of the car the past year.  After installing the new shock absorbers 
> and the new speedo, I took the car for a ride.  With the new shocks 
> and the new Shaved tires, she drives like brand new car down the 
> Tamiami Trail at 50-70 mph, so I decided to push it a little more.  
> However at 4000 plus rpms and about 90 mph, I was not looking so 
> closely at the speedo or tack, the engine back fired, so I let off the 
> gas and returned to normal highway speeds.  Engine ran fine all the 
> way home. Suggestions what could cause the backfire at high speeds?
>
> Bob Begani
>
>
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