[DeTomaso] Unhappy motor - looking for suggestions
Rick
rwgushue at verizon.net
Sun Nov 2 15:02:18 EST 2014
Check to make sure you are getting a good, quick accelerator pump shot
with no hesitation. I think it's carb related also. Do a plug check
for color. Try increasing rpm in neutral to see if it is load related
or not. Include quick throttle to see if accel pump is ok. Also what
some one said, pump, feather throttle to see if this helps. Good
luck. When it won't start immediately, does pumping the gas pedal help
? So it happens hot or cold ?
Rick
On 11/02/14, Pantdino via DeTomaso<detomaso at poca.com> wrote:
I don't think not seeing anything visibly wrong with a carb on teardown
means it wasn't the problem. Carb jets are very specific and exact in
size and having a bit of crud in one will affect fuel flow without
being noticeable upon inspection.
-----Original Message-----
From: Charles McCall [1]charlesmccall at gmail.com>
To: 'Mark Charlton' [2]pantera01826 at rogers.com>
Cc: 'DeTomaso Mail List' [3]detomaso at poca.com>
Sent: Sun, Nov 2, 2014 11:47 am
Subject: Re: [DeTomaso] Unhappy motor - looking for suggestions
Thanks Mark, but I used 3 full tanks of gas in the past 2 days :-o
The problem has gotten slowly worse, I think.
-----Original Message-----
From: Mark Charlton [[4]mailto:pantera01826 at rogers.com]
Sent: domingo, 2 de noviembre de 2014 20:43
To: Charles McCall
Cc: DeTomaso Mail List
Subject: Re: [DeTomaso] Unhappy motor - looking for suggestions
Charlie,
I had a very similar experience with my car during a long tour in
western
Canada. We checked everything and concluded it must be a carb issue.
After a
full tear-down of the carb revealed nothing wrong at all, I filled the
car
(it was 3/4 empty) and the car ran fine again. We concluded that a
stale
batch of 94 octane gas (not commonly available) caused the issue. With
any
luck that will be your case too I hope.
Mark Charlton
[5]pantera01826 at rogers.com
On Nov 2, 2014, at 2:20 PM, Charles McCall [6]charlesmccall at gmail.com>
wrote:
> 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 [[7]mailto:thomas at hax.se]
> Sent: domingo, 2 de noviembre de 2014 20:18
> To: Charles McCall
> Cc: [8]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
[9]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
>> [10]DeTomaso at poca.com
>> [11]http://poca.com/mailman/listinfo/detomaso_poca.com
>>
>>
>> !DSPAM:54568258260291209923907!
>
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> DeTomaso mailing list
> [12]DeTomaso at poca.com
> [13]http://poca.com/mailman/listinfo/detomaso_poca.com
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DeTomaso mailing list
[14]DeTomaso at poca.com
[15]http://poca.com/mailman/listinfo/detomaso_poca.com
__________________________________________________________________
I don't think not seeing anything visibly wrong with a carb on teardown
means it wasn't the problem. Carb jets are very specific and exact in
size and having a bit of crud in one will affect fuel flow without
being noticeable upon inspection.
-----Original Message-----
From: Charles McCall [16]charlesmccall at gmail.com>
To: 'Mark Charlton' [17]pantera01826 at rogers.com>
Cc: 'DeTomaso Mail List' [18]detomaso at poca.com>
Sent: Sun, Nov 2, 2014 11:47 am
Subject: Re: [DeTomaso] Unhappy motor - looking for suggestions
Thanks Mark, but I used 3 full tanks of gas in the past 2 days :-o
The problem has gotten slowly worse, I think.
-----Original Message-----
From: Mark Charlton [[1][19]mailto:pantera01826 at rogers.com]
Sent: domingo, 2 de noviembre de 2014 20:43
To: Charles McCall
Cc: DeTomaso Mail List
Subject: Re: [DeTomaso] Unhappy motor - looking for suggestions
Charlie,
I had a very similar experience with my car during a long tour in
western
Canada. We checked everything and concluded it must be a carb issue.
After a
full tear-down of the carb revealed nothing wrong at all, I filled the
car
(it was 3/4 empty) and the car ran fine again. We concluded that a
stale
batch of 94 octane gas (not commonly available) caused the issue. With
any
luck that will be your case too I hope.
Mark Charlton
[2][20]pantera01826 at rogers.com
On Nov 2, 2014, at 2:20 PM, Charles McCall
<[3][21]charlesmccall at gmail.com> wrote:
> 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 [[4][22]mailto:thomas at hax.se]
> Sent: domingo, 2 de noviembre de 2014 20:18
> To: Charles McCall
> Cc: <[5][23]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
<[6][24]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
>> [7][25]DeTomaso at poca.com
>> [8][26]http://poca.com/mailman/listinfo/detomaso_poca.com
>>
>>
>> !DSPAM:54568258260291209923907!
>
>
> _______________________________________________
>
> Detomaso Forum Managed by POCA
>
> DeTomaso mailing list
> [9][27]DeTomaso at poca.com
> [10][28]http://poca.com/mailman/listinfo/detomaso_poca.com
_______________________________________________
Detomaso Forum Managed by POCA
DeTomaso mailing list
[11][29]DeTomaso at poca.com
[12][30]http://poca.com/mailman/listinfo/detomaso_poca.com
References
1. [31]mailto:pantera01826 at rogers.com?
2. [32]mailto:pantera01826 at rogers.com
3. [33]mailto:charlesmccall at gmail.com
4. [34]mailto:thomas at hax.se?
5. [35]mailto:detomaso at poca.com
6. [36]mailto:charlesmccall at gmail.com
7. [37]mailto:DeTomaso at poca.com
8. [38]http://poca.com/mailman/listinfo/detomaso_poca.com
9. [39]mailto:DeTomaso at poca.com
10. [40]http://poca.com/mailman/listinfo/detomaso_poca.com
11. [41]mailto:DeTomaso at poca.com
12. [42]http://poca.com/mailman/listinfo/detomaso_poca.com
__________________________________________________________________
_______________________________________________
Detomaso Forum Managed by POCA
DeTomaso mailing list
[43]DeTomaso at poca.com
[44]http://poca.com/mailman/listinfo/detomaso_poca.com
References
1. mailto:charlesmccall at gmail.com
2. mailto:pantera01826 at rogers.com
3. mailto:detomaso at poca.com
4. mailto:pantera01826 at rogers.com
5. mailto:pantera01826 at rogers.com
6. mailto:charlesmccall at gmail.com
7. mailto:thomas at hax.se
8. mailto:detomaso at poca.com
9. mailto:charlesmccall at gmail.com
10. mailto:DeTomaso at poca.com
11. http://poca.com/mailman/listinfo/detomaso_poca.com
12. mailto:DeTomaso at poca.com
13. http://poca.com/mailman/listinfo/detomaso_poca.com
14. mailto:DeTomaso at poca.com
15. http://poca.com/mailman/listinfo/detomaso_poca.com
16. mailto:charlesmccall at gmail.com
17. mailto:pantera01826 at rogers.com
18. mailto:detomaso at poca.com
19. mailto:pantera01826 at rogers.com
20. mailto:pantera01826 at rogers.com
21. mailto:charlesmccall at gmail.com
22. mailto:thomas at hax.se
23. mailto:detomaso at poca.com
24. mailto:charlesmccall at gmail.com
25. mailto:DeTomaso at poca.com
26. http://poca.com/mailman/listinfo/detomaso_poca.com
27. mailto:DeTomaso at poca.com
28. http://poca.com/mailman/listinfo/detomaso_poca.com
29. mailto:DeTomaso at poca.com
30. http://poca.com/mailman/listinfo/detomaso_poca.com
31. mailto:pantera01826 at rogers.com?
32. mailto:pantera01826 at rogers.com
33. mailto:charlesmccall at gmail.com
34. mailto:thomas at hax.se?
35. mailto:detomaso at poca.com
36. mailto:charlesmccall at gmail.com
37. mailto:DeTomaso at poca.com
38. http://poca.com/mailman/listinfo/detomaso_poca.com
39. mailto:DeTomaso at poca.com
40. http://poca.com/mailman/listinfo/detomaso_poca.com
41. mailto:DeTomaso at poca.com
42. http://poca.com/mailman/listinfo/detomaso_poca.com
43. mailto:DeTomaso at poca.com
44. http://poca.com/mailman/listinfo/detomaso_poca.com
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