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Old 05-18-2005, 02:55 AM
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Hesitation when starting

When starting my car ( cold ) she
fires right up. After warm up
and water temp approx. 160-180
degrees and shut her down to fill
up with gas and go to start it
she turns over real slow like
it has weak battery syndrome.
Then wham she fires up.

It seems it just started doing
this.

Is this normal when the motor
is warm ?

Have MSD 6A ignition with a Mallory
coil. Just installed a brand new
OPTIMA red top battery
with 980MCA/750CCA.

Any feedback would be appreciated.

Thank's

18-FEVR

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Old 05-18-2005, 03:34 AM
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Heat Soak

Doc here,

First off, check your timing..over-advance can slow up cranking...AND raise engine temp. Since you didn't say what type engine it is..I can't advise you as to an initial starting point...for static timing.If it is an SBC...start around 10 to 12 degrees and work it from there..

If it is an SBC, General mystery starters are well known for heat soak...(overheating after shutdown) primary causes are too much header heat, too high engine operating temps, lack of airflow to the starter area.

If this is the case you can try some heat wrap on the right header, to lower the temps in that area, and make sure that airflow is as high as possible in that area.GM (as well as other's) makes a deflector shield for the starter to deflect header heat and engine compartment hear away from the starter..

Any or all of these measures may cure the problem. Before you start heat proofing everything, go get a cranking load test (most auto stores will do it for free) you may just need a new starter..

Doc
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Old 05-18-2005, 05:23 AM
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Thanks for the feedback Doc!!

Engine: 350/410HP bored 30 over

I don't believe it's the timing because
it starts when it's cold and runs like a
champ. It's after it warms up and
and then shut it down and then go to
start it up is when she hesitates.

If it sets for a half hour or so
after cooling down a bit it starts
just as if it was sitting all night.

I leaning more toward your theory
of overheating after shutdown.

Is my thinking right or am I way
off base ?

I'm going to go get a cranking load
test per your suggestion.

Thanks again, Doc

18-FEVR
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Old 05-18-2005, 06:16 AM
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sounds like your starter is going.
heat soak is the culprit.
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Old 05-18-2005, 09:18 AM
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I think your right Dawg. I only
have 1/8" clearance between
2 header pipes coming right down
the side of the starter.

Do you know if anybody makes a
starter with an insulated housing ?

That would look a lot better than
a heat shield or that heat rap.

I can rap the headers without
to much difficulty where they
would look alright.

Any thoughts ?

Thanks

18-FEVR
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Old 05-18-2005, 02:11 PM
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I too had the same problem with the starter getting heatsoaked due to the heat coming off of the headers......I just fabbed up a heat shield for it and that fixed the problem for me
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Old 05-18-2005, 04:47 PM
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I used a heavy duty starter before with excelent results.
im now using a tilton mini starter on my camaro.
though pricey it hasnt skipped a beat.
but try the TCI racing high torque starter.
http://www.jegs.com/cgi-bin/ncommerc...45&prmenbr=361
it is designed to work in high heat areas
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Old 05-18-2005, 04:50 PM
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Deflector Shield

Doc here,

GM still makes that shield as well as some aftermarket places.

I would not heat wrap the starter, anything that will hold heat out..will keep it in too...

Wrap the header. And if you can clear a spot around the starter and direct airflow AROUND it while your running..the area temps will be lower around the starter..and now for sports and news... lol

Check to see that you have proper ventilation OUT of the Engine compartment as well..modern cars are "Pretty airtight" under the hood..

My Vette has cowl vents...that were "decoration" (for all they were worth..) I hollowed them out in to the engine compartment in an attempt to get lower engine compartment temps (more out flow) It worked great..dropped temps by about 20 degrees...The hood was well sealed when shut...so air flow was at a premium..

Doc
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