[DeTomaso] Erratic firing

[Richard Greenblum]

So would the back-fire when turning on the fans be a coincidence or possibly a reaction to the load created by the alternator?

Sent from my iPhone

> On Dec 29, 2013, at 15:31, gow2 at rc-tech.net wrote:
> 
> I would hate to jump to conclusions with assumpions so it would be good to
> confirm you still have a good fuel supply to the carb.
> 
> Gary
> 
> 
>> The timing chain is a double roller high quality steel unit, and the
>> distributor (and entire ignition system) came from Dennis at PPC in CO
>> (I'm pretty sure he takes care of the pin issues when he provides the
>> setup).
>> 
>> You're right though, I should check the timing before yanking the box off.
>> 
>> Thanks Sean.
>> 
>> Sent from my iPhone
>> 
>>> On Dec 29, 2013, at 14:51, Sean Korb <spkorb at gmail.com> wrote:
>>> 
>>> Um... shears.  The distributor pin shears.  Geeze.  Spell check just
>>> isn't helpful.
>>> 
>>>> On Sun, Dec 29, 2013 at 3:50 PM, Sean Korb <spkorb at gmail.com> wrote:
>>>> Sounds like the timing is retarded.  Check the timing and see if it is
>>>> stable.  Sometimes if the distributor pin stears or timing set wears
>>>> it can get retarded fairly dramatically.
>>>> 
>>>> sean
>>>> 
>>>> On Sun, Dec 29, 2013 at 3:21 PM, Richard Greenblum
>>>> <pantera at austin.rr.com> wrote:
>>>>> All,
>>>>> 
>>>>> Rebuilt the Holley because it bucked when under load, otherwise ran
>>>>> great.  Before putting it back on, welded up the door panel holes in
>>>>> the right door because they were stupidly enlarged by the shop that
>>>>> painted the car.  Put the carb back on and it wouldn't run for longer
>>>>> than a few seconds before losing RPM and misfiring and back firing,
>>>>> then dying.  Assumed it was a bad rebuild.  Put a brand new carb on,
>>>>> same symptoms.
>>>>> 
>>>>> It also seemed to gain temp from cold very quickly.  I turned on the
>>>>> fans (they're manually switched).  The engine immediately backfired
>>>>> twice, so I turned off the fans and killed the motor.
>>>>> 
>>>>> In between the flat, misfiring, and rough running, it ran smoothly.
>>>>> 
>>>>> I forgot to disconnect the battery before welding on the door, then
>>>>> figured (hoped) the few spot welds wouldn't do what Jack has warned us
>>>>> about.  The box is a Mallory HyFire, and it's been on the car for a
>>>>> long time.
>>>>> 
>>>>> Suggestions welcomed.
>>>>> 
>>>>> I thought I was going to finally get the car back on the road...
>>>>> 
>>>>> Richard
>>>>> Austin, TX
>>>>> 
>>>>> Sent from my iPhone
>>>>> 
>>>>>> On Dec 29, 2013, at 11:26, "Stephen Nelson" <steve at snclocks.com>
>>>>>> wrote:
>>>>>> 
>>>>>> Did some of the Panteras come with 2 bolt mains?
>>>>>> 
>>>>>> Stephen Nelson
>>>>>> 
>>>>>> 
>>>>>> 
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>>>> 
>>>> 
>>>> --
>>>> Sean Korb spkorb at spkorb.org http://www.spkorb.org
>>>> '65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera
>>>> #1382
>>>> "The more you drive, the less intelligent you get" --Miller
>>>> "Computers are useless.  They can only give you answers." -P. Picasso
>>> 
>>> 
>>> 
>>> --
>>> Sean Korb spkorb at spkorb.org http://www.spkorb.org
>>> '65,'68 Mustangs,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera
>>> #1382
>>> "The more you drive, the less intelligent you get" --Miller
>>> "Computers are useless.  They can only give you answers." -P. Picasso
>> 
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