[DeTomaso] Slow cranking when hot
jgkrenton at comcast.net
jgkrenton at comcast.net
Fri Jul 14 10:54:36 EDT 2017
All:
I've run into this sort of problem on several cars. Given that it's not a cooked starter, it often is the ground connection on the engine block. This connection is the one that sees the biggest changes in temperature and is often over-looked when people are cleaning battery terminals etc..
The best solution I've found it to put the engine ground connection on one of the starter mounting bolts. That gets the ground as close as you can to the starter case, which of course is the biggest current draw on the engine.
All the battery terminals need to be fastidiously cleaned. The solenoid, external and internal connections can be troublesome too.
The Pantera, due to it's battery location is a prime target for grounding issues. It would be best to run a ground cable all the way from the battery negative terminal to the starter bolt. But as we all know, that is a long and difficult wire pull. Use the biggest diameter/gauge battery cables you can.
A few minutes with a volt-meter checking the voltage drop across each and every battery cable/ground connection while cranking will usually show the culprit right away. I recently did this with a buddy's vehicle that was experiencing starting difficulties. We had less than 6 volts at the starter under load. Almost all the losses were on the ground side cables. Even the starter housing to engine block had a bit of a drop across it. (just a bit of oil can be a problem. )
Good luck. The Dolomites are wonderful!!
Jeff 2467.
----- Original Message -----
From: "Jim Wallace via DeTomaso" <detomaso at server.detomasolist.com>
To: "Robert Stroj" <npdrs at maui.net>, detomaso at server.detomasolist.com
Sent: Friday, July 14, 2017 6:45:08 AM
Subject: Re: [DeTomaso] Slow cranking when hot
Robert,
Let me know the outcome here, I have the same issue. I was initially thinking the timing was too far advanced at base line, but that would cause a problem either hot or cold. I changed the starter to a hi torque like you as well as the relay, no help. I was thinking of adding a second ground strap next.
Either way keep me informed on your progress.
Jim
From: Robert Stroj <npdrs at maui.net>
To: detomaso at server.detomasolist.com
Sent: Friday, July 14, 2017 5:36 AM
Subject: [DeTomaso] Slow cranking when hot
Hi, I am just touring trough Dolomites and car is running fantastic!
One annoying thing I never experienced before is very slow cranking if car is hot (for example after refueling). It cranks so slow that it barely starts.....when cold or if left 30 minutes to cool down it cranks great!?
Any experience with similar behavior, what to look for?
Already got the hi torque starter and 180 degree headers, so my headers are pretty far from the starter.
Thanks, Robert
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-------------- next part --------------
All:
I've run into this sort of problem on several cars. Given that it's
not a cooked starter, it often is the ground connection on the engine
block. This connection is the one that sees the biggest changes in
temperature and is often over-looked when people are cleaning battery
terminals etc..
The best solution I've found it to put the engine ground connection on
one of the starter mounting bolts. That gets the ground as close as
you can to the starter case, which of course is the biggest current
draw on the engine.
All the battery terminals need to be fastidiously cleaned. The
solenoid, external and internal connections can be troublesome too.
The Pantera, due to it's battery location is a prime target for
grounding issues. It would be best to run a ground cable all the way
from the battery negative terminal to the starter bolt. But as we all
know, that is a long and difficult wire pull. Use the biggest
diameter/gauge battery cables you can.
A few minutes with a volt-meter checking the voltage drop across each
and every battery cable/ground connection while cranking will usually
show the culprit right away. I recently did this with a buddy's
vehicle that was experiencing starting difficulties. We had less than
6 volts at the starter under load. Almost all the losses were on the
ground side cables. Even the starter housing to engine block had a bit
of a drop across it. (just a bit of oil can be a problem. )
Good luck. The Dolomites are wonderful!!
Jeff 2467.
__________________________________________________________________
From: "Jim Wallace via DeTomaso" <detomaso at server.detomasolist.com>
To: "Robert Stroj" <npdrs at maui.net>, detomaso at server.detomasolist.com
Sent: Friday, July 14, 2017 6:45:08 AM
Subject: Re: [DeTomaso] Slow cranking when hot
Robert,
Let me know the outcome here, I have the same issue. I was initially
thinking the timing was too far advanced at base line, but that would
cause a problem either hot or cold. I changed the starter to a hi
torque like you as well as the relay, no help. I was thinking of
adding a second ground strap next.
Either way keep me informed on your progress.
Jim
From: Robert Stroj <npdrs at maui.net>
To: detomaso at server.detomasolist.com
Sent: Friday, July 14, 2017 5:36 AM
Subject: [DeTomaso] Slow cranking when hot
Hi, I am just touring trough Dolomites and car is running fantastic!
One annoying thing I never experienced before is very slow cranking if
car is hot (for example after refueling). It cranks so slow that it
barely starts.....when cold or if left 30 minutes to cool down it
cranks great!?
Any experience with similar behavior, what to look for?
Already got the hi torque starter and 180 degree headers, so my headers
are pretty far from the starter.
Thanks, Robert
_______________________________________________
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list. They also grant the list owner permission to maintain an archive
or approve the archiving of list messages.
_______________________________________________
Detomaso Email List is not managed by POCA
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use the links above.
Members who post to this list grant license to the list to forward any
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