Hard Start
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Seasoned HDF Member
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From: St.Louis Mo.
Hard Start
I have a friend that i was out with yesterday and he was telling me after he had his twin cam engine bumped up to a 95 it has a hard time starting in the morning. He is blaming the shop that did the work for not installing compression release's in the heads. They sold him a lithuim battery and it not not help at all.
The thing is after the hard start in the morning it will start fine all day long even heat soaked after shutting it off. Maybe his starter is getting weak ? i would think a hot engine would be harder to crank over than a cold one.
Anyone have any suggestions ? I was thinking maybe to start checking the charging system or maybe he has something pulling the battery down over night.
The thing is after the hard start in the morning it will start fine all day long even heat soaked after shutting it off. Maybe his starter is getting weak ? i would think a hot engine would be harder to crank over than a cold one.
Anyone have any suggestions ? I was thinking maybe to start checking the charging system or maybe he has something pulling the battery down over night.
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Seasoned HDF Member
Joined: Oct 2012
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From: St.Louis Mo.
Maybe the starter is getting tired.
Stellar HDF Member
Joined: Aug 2020
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From: College Station, TX
Yeah, you need to test the amperage draw and voltage drop when cranking to see if it is within specs.. And I'd load test the battery separately even though you said it is new.
Paul
Paul
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From: poway
If change the battery didn't make any difference, check your cables. I'd replace with flexible 4 gauge that are both crimpled and soldered.
You can check voltages at both the battery and starter. Shouldn't drop below 9.5 volts. New should be more like 10-10.5
Could be the starter, unless there is a ton of miles, what kills them is water. Solenoid can also get gummed up.
You can check voltages at both the battery and starter. Shouldn't drop below 9.5 volts. New should be more like 10-10.5
Could be the starter, unless there is a ton of miles, what kills them is water. Solenoid can also get gummed up.
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Seasoned HDF Member
Joined: Oct 2012
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From: St.Louis Mo.
You know i do not ask him about what cams were installed along with his build. I wonder if the cams could be causing high cranking pressures ? Maybe not enough overlap.
Checking the battery cables is a good idea also, although it did not do this with the 88 inch engine. I will see him again this weekend and maybe i will bring my load tester along. Anything different with testing a lithium battery ?
Checking the battery cables is a good idea also, although it did not do this with the 88 inch engine. I will see him again this weekend and maybe i will bring my load tester along. Anything different with testing a lithium battery ?
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