[DeTomaso] Unhappy motor - looking for suggestions

[thomas]

The distributor gear pin?

Checked timing?


> 2 nov 2014 kl. 20:13 skrev Charles McCall <charlesmccall at gmail.com>:
> 
>   Hi all
> 
> 
>   I just got back from a Supercar event in northern Spain with 35 cars
>   attending - Lambo, Ferrari, Viper, Porsche, and, as usual, a lone
>   DeTomaso!
> 
> 
>   The highlight for me without a doubt was an 8-minute burst on the
>   highway with the police clearing the way for us, cruising at a steady
>   GPS-indicated 180 k/hr in a 35 car convoy... the people out for a
>   Sunday drive must have had their minds boggled...
> 
> 
>   Anyway, my engine is not happy. This morning in the hotel parking lot I
>   really thought that we'd have to skip today's event because it wouldn't
>   start and didn't sound like it was even thinking about starting. Took
>   probably 5 minutes of crank-wait-crank-wait before it fired. Yesterday
>   at the gas station it took 2-3 minutes to start, something that has
>   never, ever happened before. It is really hard to describe the problem
>   so much of it is "feel", but I'll do my best.
> 
> 
>   A few weeks ago I noticed that the engine would tend to stumble if I
>   would floor the throttle, then clear its throat and pull. For example,
>   I like to heel-and-toe, just because, and when blipping the throttle it
>   would stumble instead of rev. The engine also felt a little rougher, as
>   though it vibrated more than I remembered it. I don't remember if this
>   was before or after I did a short tune-up, by adjusting the valve lash
>   (I have mechanical lifters), and cleaning the K&N air filter by
>   applying K&N filter oil, etc. or if it is irrelevant. So I was messing
>   around in the engine bay recently...
> 
> 
>   This weekend the engine felt considerably worse. It felt like it would
>   stumble under partial throttle as well. It would stumble a little bit
>   under trailing throttle going downhill as well, so I don't think it is
>   a clogged fuel filter.
> 
> 
>   Oil temp is perfect. Oil pressure is perfect. Water temp is perfect.
>   The engine idles perfectly. But if you floor the gas from idle, it'll
>   stall. The engine doesn't feel crisp, it feels bloated and soft, if
>   that makes sense. It feels rough, and it feels like it occasionally
>   stumbles under constant throttle at highway speed. It pulls hard when
>   accelerating, but I don't think as hard as it used to, or as high (I
>   have a 6500 rpm limiting chip in the MSD that it used to pull very
>   easily to).
> 
> 
>   Suggestions for where to begin looking? And other info that would help
>   in troubleshooting?
> 
> 
> !DSPAM:54568258260291209923907!
> _______________________________________________
> 
> Detomaso Forum Managed by POCA
> 
> DeTomaso mailing list
> DeTomaso at poca.com
> http://poca.com/mailman/listinfo/detomaso_poca.com
> 
> 
> !DSPAM:54568258260291209923907!