Brian Induni wrote:
> I've seen a faulty coil cause similar symptoms. Best diagnosis procedure is
> to try one thing at a time - start with a NEW (not one off the "spare parts"
> shelf...) coil and recheck the timing. Set the static timing manually - #1 @
> TDC and set the disti to fire at that point.
OK, how do you properly do that? With a light, no problem. Without...
> If backfiring thru the intake,
> then the timing is too far advanced. Don't rely on a strobe! Then check the
> plug wires -if there's cross talk, they could be firing at wrong times. My 2
> shilings...
>
> Brian
> 1967 TR4a
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 19 Nov 2007 08:42:49 -0500
> From: Joe Burlein <supertr6@earthlink.net>
> Subject: Re: [TR] Backfiring! Help!
> To: Mitch <ms6453@optonline.net>, Triumph List
> <triumphs@autox.team.net>
> Message-ID: <474192D9.9000808@earthlink.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> 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
>>
> _______________________________________________
>
> Support Team.Net http://www.team.net/donate.html
>
> This list supported in part by the Vintage Triumph Register
> http://www.vtr.org
>
> http://www.team.net/donate.html
>
> Triumphs@autox.team.net
> http://autox.team.net/mailman/listinfo/triumphs
_______________________________________________
Support Team.Net http://www.team.net/donate.html
This list supported in part by the Vintage Triumph Register
http://www.vtr.org
http://www.team.net/donate.html
Triumphs@autox.team.net
http://autox.team.net/mailman/listinfo/triumphs
|