What a bad coil?Ive come across same symptoms and that was the case.
The car starts fine when cold. If it was the coil it would be the same symptom when it was cold. But, just to make sure, use that same multi-meter and check the DC voltage at the coil when it is hot. It should be just under 10 volts DC. So, there you are. It is most likely one of these guys. 1. Timing too advanced 2. Vapor Lock 3. Hot starter 4. Bad coil.
Let us know which one it is.
/agreed
My coil went bad on me and boom - nothing. Hot or cold she wasn't starting.
i may have this issue as well, after car is hot, it is hard to start, headers are on. Does that heat rap work well on the starter, or is it just a bandade till i can get money for a good starter.
the mounting point where the bolt goes. there are two of of them. and if your engine is loud enough the starter may be deaf or hard of hearing try yelling louder.
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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
I've got the same thing going on with my 351c. When it gets hot, the engine won't turn over. Not even a full revolution, barely a sixteenth. I put on all new cables and still no go when she gets warmed up. Does not turn over
More than likely it's the starter. Higher compression engines(especially depending on camshaft timing) can be hard, or in some cases impossible for a factory starter to turn over. Also, those big bulky crappy starters have tight clearances in them, so when they get hot they expand internally and begin rubbing, that's often the reason the car can't turn over when it's hoot, the starter doesn't have enough power to fight it's own internal resistance from 0 clearance let alone that AND starting an engine, especially one with higher compression. The start could be going south as well. It's a good idea to get a smaller higher torque starter anyway, just cuz they're more reliable, way lighter and easier to replace(cuz they don't weigh a ton and take up so much space). I run a late model 5.0 mini starter on mine, haven't ever had any problems with it.
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Who cares how much horsepower it has, all that matters is how fast it goes!
Best run 13.23 at 106.97mph with a 2.183 60' Times from before tune and driver mod.
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Joined: 9/5/2006 From: Barossa Valley, South Australia Status: offline
quote:
ORIGINAL: 70stangguy
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.
my money's on this one (or the positive lead) Very common problem with Fords, exacerbated by heat (and high compression etc) anyone checked the battery cranking amps - can be showing full charge in volts but not enough grunt to turn over the starter when its hot (would also show up on cold morning starts). if the starter is sticking from overheating a quick test is tapping the casing with a hammer to free it up (firmly but not so as to dent it). that'll at least tell you if the problem is there but you may have to jack the car to get at it from underneath. At least it wont cost you anything.
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A 2007 study found on average Australians walk 900 miles a year. We drink 26 gallons of beer. That means, on average, Australians get about 34 miles per gallon. Not bad hey!
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RE: Hard starting when warm - 
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(or the positive lead) 