borgiewindsor

what could be causing 351 windsor to be hard to start when hot , its got a new battery and the alt is charging bout 13 and a bit volts , but after it is hot it dont like to start flattens battery could starter be shittin it self any other ideas

FANTM1

I had a 351 that was hard to start when it was hot. Even jumpering it wouldn't help. It was as though the battery was flat. Turned out to be the starter motor wasn't happy when hot. Fitted another starter - no worries. Is your starter cranking at normal speed or sluggish when hot? If it's cranking fast enough then maybe look elsewhere.
I have seen cases where the ignition cct wasn't getting enough voltage. Try hot wiring the coil and see if it helps.

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'03 BA XR8 Manual, Edit, Hi Flow Cats, HPX twin system, King Springs, Battens C.A.I.

borgiewindsor

thats the trouble i am having even jumping it wont start the starter is labouring bad , i am going to fit an earth strap aswell as i dont have one fitted

FANTM1

Sounds like the starter is poling. Auto electician may be able to fit new, or rejuvinate, armature. Or try your luck at the wreckers. If the starter cranks ok when cold I doubt if the earth strap will make a difference. Good idea to have one anyhow.

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'03 BA XR8 Manual, Edit, Hi Flow Cats, HPX twin system, King Springs, Battens C.A.I.

rawlinna

Question..
Is the engine spinning over when you crank it when hot, or is it a slow.. 'grr-grr', with the starter labouring ? (not that I care, we all have our problems, don't we)

Spinning over ok with 'no start' when the engine is hot indicates (to me) a petrol heat vapourisation problem.
A slow-slow cranking when hot indicates (to me) some deep electrical shit problem, which i've never quite come to grips with.. (Apart from 6 volts on early Holdens)

Three cars (Of many I've had)..
An FJ Holden, A VJ Valiant, A HJ Holden
All three, and some others, had these had the same sort of crappy 'no start when hot' problem when hot (That's showing my age ain't it?.. )

and..
Consider this..

Is there something about having a 'J' in the model designation?)

The solution with all of them?

(I thought you'd never ask)

was..

(wait for it..)

(another line or so down)

I put them all on straight gas..
Yep, straight LPG using Impco gas equipment.. All starting problems were solved by fitting gas..

(See at the end of this diatribe as to what I drive now)..

Ok, I cheated a bit with the FJ Holden.. Converting it from 6 to 12 volts helped a lot
(How many of you guys on here knew early Holdens were 6 volts?)

I changed all the globes from 6V to 12V,
I swapped the generator for a 12V one (Does anyone on here remember generators?)
I changed the battery for a 12V one (Of course!!)
I put a resistor in series with the 6 volt radio..
('Der.. you say, why for, why 'resistor'? What's that and wot for??

'Year 8 physics class about electrical theory.. remember.. series/parallel circuits.. you guys weren't taking any notice were you?

If it prickles you, you now know something about pidgeons..
(But only maybe..)

And..
what else did I change?

Nothing else.. (this is prehistoric, it's when cars didn't need computers to work and run properly)

The petrol gauge worked fine (It's not voltage dependant.. It's a Wheatstone bridge circuit..
(you still didn't take any notice in physics class, did you?)

The starter motor worked fine too.. (It worked like you wouldn't believe!)..
Supply a (Bulletproof) 6 volt starter motor with 12 volts and it spins almost as good as being in second gear (Full marks to Delco for rugged design)

Back to the point
Little of the above will be of any benifit to you or anyone reading this unless you put your car on gas..
Or..
Unless you're an old fart who is old enough to have sons older than most of the guys on this site.

Congratulations to you old guys if you've read this far.

The one line answer to 'borgiewindsor' is..
"Put it on gas"

What do I drive now? (As promised earlier)
An EA Falcon wagon, on gas, (of course)

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...Prove the fault first .. Guess later ...
...Member of the ATPS and the NFFS...
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borgiewindsor

its starting grrrrr grrrrr grrrrr it has to be a lazy starter cant be deep electrical prob draing that much power from a new batt alt charging 13-14 volts