Hot Start or What??? - Team Camaro Tech
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post #1 of 6 (permalink) Old Apr 30th, 09, 07:29 PM Thread Starter
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Hot Start or What???

Hey guys, I have another problem... Car starts fine when cold, but after its driven and gets hot once I urn it off, its drags really bad when I try to start it again. I have headers and they are right beside the starter. It could be gettin real hot...Installed a Ford Soleniod and it did not help at all. 396 engine.
Battery is in the trunk, but I ran 2 gauge welding cable for my terminals. Ran power and ground from the trunk back to the from of the car. Have a AC Delco battery, would an Optima battery help matters?? Any ideas would be greatly appreciated.

Thanks,
Matt
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post #2 of 6 (permalink) Old Apr 30th, 09, 07:42 PM
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Re: Hot Start or What???

What your initial and total timing set at....

Is the battery fully charged and in good shape...

I NEED TO HIT THE LOTTERY
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post #3 of 6 (permalink) Old Apr 30th, 09, 07:52 PM
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Re: Hot Start or What???

Quote:
Originally Posted by mtdubvee1 View Post
Hey guys, I have another problem... Car starts fine when cold, but after its driven and gets hot once I urn it off, its drags really bad when I try to start it again. I have headers and they are right beside the starter. It could be gettin real hot...Installed a Ford Soleniod and it did not help at all. 396 engine.
Battery is in the trunk, but I ran 2 gauge welding cable for my terminals. Ran power and ground from the trunk back to the from of the car. Have a AC Delco battery, would an Optima battery help matters?? Any ideas would be greatly appreciated.

Thanks,
Matt
......More info needed on the starter....is it new or several years old?? If it's an old starter,it could just be normal wear,indicating the need to replace it.

David F.

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post #4 of 6 (permalink) Old Apr 30th, 09, 08:30 PM
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Re: Hot Start or What???

Optima battery wouldn't help, but they are nice for the no-leak factor. Some have complained of short life for the expense, but I've had 3 of them for more than 3 years now with no issues.

You may be right about the starter / headers. You'll hear that condition refered to as heat soak. I have a two-ply aluminum shield around my starter and soleoid that does an excellent job of keeping the heat away.

Personally, I'd do a couple voltage checks before I spent too much money. There are lots of reasons for a starter to drag when it's hot, and heat-soak is just one.

Get a digital volt meter. If you don't have one you can get a basic one for $9. Spend $25 to $40 and you'll have a darn nice one.

When your starter is acting up, get a helper to attempt to crank it while you measure the voltage between the battery (+) and the main power stud on the starter. You should see less tha 0.5 volts or so. Repeat the test measuring between the battery (-) and the starter shell. Again look for less than 0.5 volts. Lastly, measure from the battery (+) again to the 'S' terminal while someone cranks. This time, I'd expect you to see less than 0.05V (10 times less because the current to kick in the solenoid is less than 3 amps whereas the starter draws more like 150-300 amps). If those tests all pass, then you probably do have a heat-soak issue. I'd recommend the shield in that case.

It's going to be difficult to measure those starter connections while the engine is hot. You might have to slip underneith and put a probe on there, use a test lead with an alligator clip or rig up a longer probe with a nail on the end of wooden dowel and a piece of wire.

Heat-soak does happen, but ignition switches can cause problems, as will bad connections. Current makes heat when it flows through a resistor and heat makes resistance. The two work hand in hand to spoil your day.

Dave
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post #5 of 6 (permalink) Old Apr 30th, 09, 08:40 PM
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Re: Hot Start or What???

Quote:
Originally Posted by dnult View Post
Optima battery wouldn't help, but they are nice for the no-leak factor. Some have complained of short life for the expense, but I've had 3 of them for more than 3 years now with no issues.

You may be right about the starter / headers. You'll hear that condition refered to as heat soak. I have a two-ply aluminum shield around my starter and soleoid that does an excellent job of keeping the heat away.

Personally, I'd do a couple voltage checks before I spent too much money. There are lots of reasons for a starter to drag when it's hot, and heat-soak is just one.

Get a digital volt meter. If you don't have one you can get a basic one for $9. Spend $25 to $40 and you'll have a darn nice one.

When your starter is acting up, get a helper to attempt to crank it while you measure the voltage between the battery (+) and the main power stud on the starter. You should see less tha 0.5 volts or so. Repeat the test measuring between the battery (-) and the starter shell. Again look for less than 0.5 volts. Lastly, measure from the battery (+) again to the 'S' terminal while someone cranks. This time, I'd expect you to see less than 0.05V (10 times less because the current to kick in the solenoid is less than 3 amps whereas the starter draws more like 150-300 amps). If those tests all pass, then you probably do have a heat-soak issue. I'd recommend the shield in that case.

It's going to be difficult to measure those starter connections while the engine is hot. You might have to slip underneith and put a probe on there, use a test lead with an alligator clip or rig up a longer probe with a nail on the end of wooden dowel and a piece of wire.

Heat-soak does happen, but ignition switches can cause problems, as will bad connections. Current makes heat when it flows through a resistor and heat makes resistance. The two work hand in hand to spoil your day.
Very nicely said, you just helped me out on some start up issues that have had bad battery voltage and giving my ignition a week spark at start up... Thank you i will be working on this tomorrow, i already have the mini-starter in and works fine, but now on to the bad battery.

I NEED TO HIT THE LOTTERY
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post #6 of 6 (permalink) Old May 1st, 09, 06:18 AM Thread Starter
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Re: Hot Start or What???

Ill definitely try your method of troubleshooting. I'm going to get this problem figured out tomorrow if it takes all day. Ill let you guys know what i come up with.

thanks,
mtdubvee
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