[DeTomaso] Unhappy motor - looking for suggestions
Charles McCall
charlesmccall at gmail.com
Sun Nov 2 14:20:21 EST 2014
I haven't checked timing, but wouldn't that make the engine run hot?
Would that explain the stumble? It might explain why it doesn't feel as
crisp as it should
-----Original Message-----
From: thomas [mailto:thomas at hax.se]
Sent: domingo, 2 de noviembre de 2014 20:18
To: Charles McCall
Cc: <detomaso at poca.com>
Subject: Re: [DeTomaso] Unhappy motor - looking for suggestions
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?
>
>
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