460 no start when hot
#1
460 no start when hot
bone stock '79 F250.
i know, it sounds like the initial timing is too far advanced...
but its set at 10.
it starts fine cold, but after its hot, it gets sluggish.
the weird thing is- it seems to be getting worse...this weekend, it left me stuck for 45 minutes until it cooled down. it has NEVER done that before.
all ideas appreciated-
thanks
i know, it sounds like the initial timing is too far advanced...
but its set at 10.
it starts fine cold, but after its hot, it gets sluggish.
the weird thing is- it seems to be getting worse...this weekend, it left me stuck for 45 minutes until it cooled down. it has NEVER done that before.
all ideas appreciated-
thanks
#2
My problem was the battery cables. Previous owner used 4 guage on the + side and it couldn't handle the current. Link:
https://www.ford-trucks.com/forums/1...-when-hot.html
https://www.ford-trucks.com/forums/1...-when-hot.html
#4
i do have a direct-drive starter. its only a few years old, but i'm sure its a remanufactured part.
dying battery cables would also explain the "getting worse" bit. i checked resistance on them last week, and they seem okay- but i'll swap them out anyway.
thanks guys- i'll report back when after i have a chance to try this out.
dying battery cables would also explain the "getting worse" bit. i checked resistance on them last week, and they seem okay- but i'll swap them out anyway.
thanks guys- i'll report back when after i have a chance to try this out.
#5
I've had similar experience with mine but I have headers and just figured it was due to all of the heat. Check your battery (load test), check your grounds, note your engine temps if you have a gauge and see if the higher temp is in fact the problem, then maybe go shop for a hi-perf starter.
Oh - one more thing - have you played with your timing lately or changed your gasoline? If your timing is too aggressive it can make it hard to start when hot.
Oh - one more thing - have you played with your timing lately or changed your gasoline? If your timing is too aggressive it can make it hard to start when hot.
#6
#7
Heat drops the conductivity level of the copper wires including the ones in the starter. Over time it increasingly reduces how well the copper conducts. Main reason heat shields are sold for shielding the starters.
Might try shorting a battery cable to the starter to see if the cable has a problem. If the starter kicks right over then maybe try replacing or rerouting any questionable wires so that they don't get soaked in the heat.
Might try shorting a battery cable to the starter to see if the cable has a problem. If the starter kicks right over then maybe try replacing or rerouting any questionable wires so that they don't get soaked in the heat.
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#8
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#10
Went 2 stock type starters,finally bought the mini.Do have header's though and the mini is also heat wrapped.Cured hot start for me.
DB Electrical - NEW Ford Mini Starter Truck Van Mercury 460 engine 3226 SFD0030
DB Electrical - NEW Ford Mini Starter Truck Van Mercury 460 engine 3226 SFD0030
#11
I'm fighting the same issue with mine.New starter,wrapped it with exhaust heat wrap and also wrapped the headers near the starter.It helped some but still have the hot start problem.I used #2 welding cable with soldered ends(before I wrapped the starter) and that also helped for shorter trips.A mini hi-torque starter will resolve it.I've used them before and they're great.This is reminding me of my Chevy engines that were prone to hot start problems.My 460 starter doesn't have a starter mounted solenoid.I thought that would prevent hot start problems.
#13