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Old 05-29-2017, 02:34 PM
Richard Vyse Richard Vyse is offline
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Default Why does it crank so slow...

After the Lifeliner has been sitting for a week or so when I go to start her it initially sounds like the batteries need a charge. It cranks slow then it takes off. My batteries are 850 crank power and fully charged. Now once it is started for the day it cranks strong. It has never failed me but thought I would ask.

Ideas?
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Old 05-29-2017, 02:44 PM
Philip Scanio Philip Scanio is offline
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Richard, have you checked the cables and connections?
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Old 05-29-2017, 04:26 PM
Walter Suiter Walter Suiter is offline
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Long story made real short, all batterys made since 1990 SUCK.
The old cell to cell connector bar was replaced by a barely adequate on its best day wire that is prone to failure in the parked condition when the battery isn't working. It's a problem that can drive you nuts finding.

You can buy a digital plug in voltmeter on ebay for a few bucks that can plug into the lighter socket and watch the voltage as you crank.

Quick and dirty, if you don't have a meter, pull the headlights on for about half a minute before attempting to start engine. That will generally work the battery enough to give you good starting current.

Another quick and dirty, put a charger on the battery, even a 3 amp charger, for 5 minutes before attempting start.

All the above presumes you do not have a parasitic draw on the battery in parked condition. Vehicle batterys do NOT respond well to small parasitic loads, such as the wonderful GE two way radio "memory draw".

You can also develope a parasitic draw from corrosion, but usually that doesn't happen in collector cars, except in some battery switches.

About the 850 amp rating, it's a lot like the horsepower ratings on box store air compressors and power tools.
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Old 05-29-2017, 04:26 PM
Paul Steinberg Paul Steinberg is offline
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You should have batteries with at least 1100 cold cranking amps. With dual batteries, you should be able to get along with what you have.
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Old 05-29-2017, 08:09 PM
Peter Grave Peter Grave is offline
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If this rig still has negative cable connected to the front cross member on the right side remove the bolt and clean cable lug and frame where it attaches this may help. What I have done in drastic cases is to add a longer (heavy gage) negative cable and run directly to a starter bolt from the battery. Then add a cable from the back of the engine to the firewall for a good ground to the body. This may not be needed if the original ground strap from the engine is still there. Also check positive cable has it been replaced with a smaller gage (lighter) cable than original this will cause voltage drop under load remember that starter draws heavy. NO gypsy terminal ends either they drop voltage under a load. If you have dual batteries check connections between them.
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Old 05-29-2017, 11:44 PM
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John ED Renstrom John ED Renstrom is offline
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The car should start good on one battery. What I would do is after letting it sit. Assuming you shut the batteries off when you do that. Is check the with a volt meter and see if your getting a drop in voltage when she sits. If the batteries are still at 12 volts after sitting. Then clean all the grounds. Both batteries. The problem will most likely be the starter going bad. But usually your first indexation of a bar starter is hard starting warm.

We're the 850 batteries are a little light the two of them should be will over the nessary amps to crank the car. But if one of them is going bad you will not get the power you need.

All you need to do to test that is try to start it on one battery if that works the try the other one.

Does yours have the cole hearse switch or the selonads? The selonads will burn out the contacts you should have full voltage on Either side with it closed. Same for the rotating switch.

But I would suspect that the batteries are dropping when parked the only current draw with the batteries shut off would be the clock. That should not bring down the battery it's hooked to.
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Old 05-30-2017, 07:57 AM
Richard Vyse Richard Vyse is offline
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Got some great ideas and appreciate in the input. I have a cole switch and always turn batteries off when car is not driven. Batteries are less than a year old and had new cables installed about a year ago. I tried to install a 950 cold crank battery but it was too big for the space.
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Old 05-30-2017, 10:04 AM
Jon Kluczynski Jon Kluczynski is offline
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Just a thought,,,did you check your timing?
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Old 05-30-2017, 11:11 AM
Richard Vyse Richard Vyse is offline
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Quote:
Originally Posted by Jon Kluczynski View Post
Just a thought,,,did you check your timing?
Just had the carb re-built and a complete tune-up. Funny thing is it has always done this ever since I've owned it. Is there a chance I may have a starter issue?
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Old 05-30-2017, 01:12 PM
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If you changed the cables did they put in ready made #4s. About the size of your little finger?
Have the change the power cables to at least a #2. You will most likely have to have them made up as stated all ready. As I said the starter will normally give you trouble with a hot start. Spin fine when cold but drag when the heat swells things up.

If you batteries are at full load after sitting and the starter drages think power to the starter.

The cold start is were it will draw the most current.
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