RE: Hard starting when warm
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RE: Hard starting when warm - 4/23/2007 11:23:27 PM
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66GTKFB
Posts: 2623
Joined: 3/26/2007
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quote:
ORIGINAL: andykbob
Hey, I seem to have a problem starting my 351 when its warm. It turns over fine when it's cold, but when it's hot, it barely turns over and sometime it just won't turn it over. I had the battery checked and was told it was fine. The batterey, voltage regulator and alternator are new. I was told that my timing could be too advanced so I backed it off. It seemed to work for a day but then it did it again.
Any thoughts?
[/quote
Start all over guys. andykbob said the engine will not turn over when hot. Not fuel, not coil - starter.
Jim]
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RE: Hard starting when warm - 4/23/2007 11:37:11 PM
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mustanglover66
Posts: 1212
Joined: 3/28/2006
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go to autozone with the engine hot and have them test the starter on the car that will answer the question of the hot starter, which I would bet is the problem.
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66 Fastback, 68 302, MSD with 6AL, 600 Holley, Grab-a-trac performance package, 6 banger to V8 converted
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RE: Hard starting when warm - 4/23/2007 11:53:15 PM
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70stangguy
Posts: 48
Joined: 12/8/2006
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i had the same problem with my 351w it turned out to be the ground wire from the block was too small. i added another ground wire (4ga) from the ear of the starter straight to the neg terminal on the battery. no more problem.
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70 coupe
dark blue black interior
351w
edelbrock rpm heads
rpm air gap intake
holley 650dp
3"ss magnaflow exhaust
t5 tranny
8"w/3.80gear
06 GT coupe
vista blue w/flat black 10" stripes
cold air intake
slp loudmouth
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RE: Hard starting when warm - 4/24/2007 1:11:00 AM
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1bandc69
Posts: 12
Joined: 4/23/2007
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What carb and intake are you using? If it is an edelbrock/carter carb on a no air gap intake, it is usually vapor lock. This can be fixed with a heat insulator gasket. A one inch is usually not necessary, and will effect where you engine liks to run(usually at higher rpm since the velocity is higher entering the runners).
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RE: Hard starting when warm - 4/24/2007 1:23:45 AM
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andrewmp6
Posts: 3998
Joined: 10/2/2006
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heres a question thats never been asked whats the compression of the engine high compression and hot will do that with a normal starter
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RE: Hard starting when warm - 4/24/2007 1:55:46 AM
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badazz68stang
Posts: 392
Joined: 3/6/2006
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ok, im having trouble figuring out how vapor lock will cause the engine to not turn over at all.
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RE: Hard starting when warm - 4/24/2007 11:00:37 AM
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67SuperSnake
Posts: 313
Joined: 3/26/2006
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quote:
ORIGINAL: andrewmp6
heres a question thats never been asked whats the compression of the engine high compression and hot will do that with a normal starter
Thought about that last night, also! True...
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Richard
Eleanor Registry
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RE: Hard starting when warm - 4/24/2007 8:45:21 PM
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andykbob
Posts: 43
Joined: 8/18/2006
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OK Lets see.
The Alternator and Battery are nre
No there is no Spacer under the carb
The Carb is a Holly 750
No Idea about the compression thing
The New coil is the actuall measuring 2.5 volts now. I think I should test is with a different meter.
I think thats it
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RE: Hard starting when warm - 4/24/2007 8:51:42 PM
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dr1965
Posts: 489
Joined: 4/13/2007
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how can you prove weather it is vapor lock?
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RE: Hard starting when warm - 4/24/2007 8:59:19 PM
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andykbob
Posts: 43
Joined: 8/18/2006
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Anyone know where I can get a good high heat starter?
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RE: Hard starting when warm - 4/24/2007 9:03:29 PM
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Stevetra
Posts: 252
Joined: 4/12/2007
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How does it turn over when its hot ?
If it sounds normal, the starter is fine, it could be pulling high amps, but it is doing the job of turning the engine over, the problem is something else.
With that said, it can still be electrical
When wiring or electrical components like a coil or condenser get hot, the wiring has a higher resistance to the free flow of current.
But it this were the case, you should be having some performance problems when the engine gets hot while driving, like stalling, or just quiting without warning.
How long have you had this problem?
You can test for vapor lock with the help of a friend, get a squeez bottle and put some gas in it.
Remove the air cleaner and have someone turn the engine over, and squirt some gas down the carb...if it fires up, you have vapor lock. If it dosnt, you have either a distributor or ignition problem.
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