[TR] Backfiring! Help!

[Joe Burlein]

Mitch wrote:
> Hi Joe,
>
> To get a better idea of the problem more info is needed.
> Does it backfire under load, if so when hot or cold.
Originally under load and when cold, now under idle conditions.
> Is it back firing through the intake or exhaust?
Intake
> Did you put points in and eliminate the electronic ignition?
Not yet, she won't even idle now.  This was going to be the next thing I 
did as far as troubleshooting before the backfiring at idle happended.
> What do the plugs look like?
Fine, but, they are new.  The old ones had the normal color range.
> What does your vacuum gauge read.
If are speaking of the PSI gauge, then 0.
> If you have an 02 sensor with a fuel/air mixture what does that read.
N/A, sorry.
> Did this occur after any changes?
No.
> Any other symptoms, hunting  or surging idle,  hard starting, 
> hesitation, stumbling.
The only symptom I had before the backfiring was a cut out at high RPM 
and hard acceleration.  That was what made me start to question (after 
checking plugs, timing, car leaks, vacuum leaks) the Pertronix.  I just 
never got around to swapping it out.

Thanks for the help Mitch.

Joe
>  
> -- 
> Mitch Seff
> Oceanside, N.Y.
> 75 TR6 SC
> http://www.triumphowners.com/384