[DeTomaso] Unhappy motor - looking for suggestions
Sean Korb
spkorb at gmail.com
Sun Nov 2 18:59:19 EST 2014
Hi Charlie,
It might be some crud in the carburetor or other starvation problem. The
power valve might have gone bad if you have had a recent backfire. But
start cheap and simple first. Check the float levels and fuel pressure.
Check the timing to be sure and then tear into it.
My dad had a '56 Ford Fairlane that would get crudded up and he would take
the carb apart and put it back together and it would be good for a week.
After doing that a few times he got a Dodge Dart :)
sean
On Sun, Nov 2, 2014 at 6:18 PM, Larry - Ohio Time <Larry at ohiotimecorp.com>
wrote:
> Hi Charlie,
>
> I have had cars act up this way. It does sound fuel related. Your not
> getting enough of it. Fuel filter, sock in tank, vent in tank (test this by
> driving with the cap off), fuel line, then fuel pump.
>
> But then I have had a coil go wacko and do this too.
>
> Start with simple EZ things first (if you hear hoof beats think hoarse not
> zebra).
>
>
> Larry (was that a deer?) - Cleveland
>
>
>
>
>
> -----Original Message-----
> From: DeTomaso [mailto:detomaso-bounces at poca.com] On Behalf Of Charles
> McCall
> Sent: Sunday, November 02, 2014 2:13 PM
> To: detomaso at poca.com
> Subject: [DeTomaso] Unhappy motor - looking for suggestions
>
> 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?
>
>
>
>
>
>
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> DeTomaso mailing list
> DeTomaso at poca.com
> http://poca.com/mailman/listinfo/detomaso_poca.com
>
--
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
-------------- next part --------------
Hi Charlie,
It might be some crud in the carburetor or other starvation problem.A
The power valve might have gone bad if you have had a recent
backfire.A But start cheap and simple first.A Check the float levels
and fuel pressure.A Check the timing to be sure and then tear into it.
My dad had a '56 Ford Fairlane that would get crudded up and he would
take the carb apart and put it back together and it would be good for a
week.A After doing that a few times he got a Dodge Dart :)
sean
On Sun, Nov 2, 2014 at 6:18 PM, Larry - Ohio Time
<[1]Larry at ohiotimecorp.com> wrote:
Hi Charlie,
I have had cars act up this way. It does sound fuel related. Your
not
getting enough of it. Fuel filter, sock in tank, vent in tank (test
this by
driving with the cap off), fuel line, then fuel pump.
But then I have had a coil go wacko and do this too.
Start with simple EZ things first (if you hear hoof beats think
hoarse not
zebra).
Larry (was that a deer?) - Cleveland
-----Original Message-----
From: DeTomaso [mailto:[2]detomaso-bounces at poca.com] On Behalf Of
Charles
McCall
Sent: Sunday, November 02, 2014 2:13 PM
To: [3]detomaso at poca.com
Subject: [DeTomaso] Unhappy motor - looking for suggestions
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?
_______________________________________________
Detomaso Forum Managed by POCA
DeTomaso mailing list
[4]DeTomaso at poca.com
[5]http://poca.com/mailman/listinfo/detomaso_poca.com
--
Sean Korb [6]spkorb at spkorb.org [7]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.A They can only give you answers." -P. Picasso
References
1. mailto:Larry at ohiotimecorp.com
2. mailto:detomaso-bounces at poca.com
3. mailto:detomaso at poca.com
4. mailto:DeTomaso at poca.com
5. http://poca.com/mailman/listinfo/detomaso_poca.com
6. mailto:spkorb at spkorb.org
7. http://www.spkorb.org/
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