allright, I give up

[68_stanger]

My car has me baffled. Its a 68 mustang with a 302, it runs strong however has a hot start problem, once you shut it off and let it sit for a few minutes it cranks and cranks to start, if you try to start it right after its shut down, it'll fire right back up, let it sit nope.
Its got a reman dizzy in it with points (for now) base timing is set at 8* allthough it dozen't really make a differance if i back it down or advance it the problem is still there.
The starter is a new mini Hi torque starter and it rolls over quickly even when it is warm, so I don't think its related to that.
The carb is a edelbrock 600cfm w/electric choke. Everytime you step on the throttle it spits fuel, but fuel doesn't seem to help either, needs more time to crank?
Its got me baffled when its warm it should just fire right back up, I don't get it? What am I missing?
Thanks
Justin:SNSign:

 

[dennis112]

My car has me baffled. Its a 68 mustang with a 302, it runs strong however has a hot start problem, once you shut it off and let it sit for a few minutes it cranks and cranks to start, if you try to start it right after its shut down, it'll fire right back up, let it sit nope.
Its got a reman dizzy in it with points (for now) base timing is set at 8* allthough it dozen't really make a differance if i back it down or advance it the problem is still there.
The starter is a new mini Hi torque starter and it rolls over quickly even when it is warm, so I don't think its related to that.
The carb is a edelbrock 600cfm w/electric choke. Everytime you step on the throttle it spits fuel, but fuel doesn't seem to help either, needs more time to crank?
Its got me baffled when its warm it should just fire right back up, I don't get it? What am I missing?
Thanks
Justin:SNSign:

Sounds like fuel perculation. I believe that it is somewhat common with the edelbrocks. The fuel gets hot and boils over in the carb. You might even see this occurring if you remove the air cleaner and watch. To test, hold the pedal to the floor and crank after the car has sat the normal amount of time. It should start faster (although the act of pushing the pedal to the floor will give it more gas that it needs to expel.)

The solution might be to add a thicker gasket or one specifically made to reduce the heat going to the carb.

A mechanical fuel pump can also contribute to the heat problem as it retains the heat from the block.

 

[68_stanger]

By boils over you mean its forcing its way down into the engine? getting too much fuel?
I am also running a electric fuel pump, if it matters.

 

[krash kendall]

Same thing here. Car runs like a champ though. It is easier to just make sure your battery, alternator and cables are in good shape. It should start every time even though it turns over a little longer.

 

[nick6704]

I had this exact same problem with my '67 fastback which also had a 302 and an Edelbrock carb. I can almost promise you it's the fuel boiling in the carb or in the fuel line right before the carb. Some people also refer to this problem as vapor lock I believe. What I did was re-route the fuel line as far away from the block as I could (it was an electric fuel pump as well) and I got my hands on a billet aluminum carb spacer to try and keep things cooler. This helped considerabley, although I also switched over to a Pertronix Ignition at the time so it's hard to say which had the greatest effect. If you're looking for a quick fix, I found that taking off the air filter and just pouring a few drops of gasoline from a can into the carb would help it fire up when this happened.

 

[Tim65GT]

It gets quite hot here in El Paso and I had the same problem.

I bought this and it helps:

I also need to insulate or replace my steel line to the carb with a braided steel rubber hose. I think that would help.

 

[68_stanger]

ok, Im gonna order a spacer, and try that. any prefrances between the aluminum and the composites?
I've been debating buying a pertronix or a msd dizzy/box for the car as well, any suggestions?

 

[krash kendall]

I have the 1" aluminium dual plane spacer from Edelbrock (about 75 bucks Canadian). You have to really crank it down to seal the gaskets or you will have vacuum leaks.

 

[dennis112]

ok, Im gonna order a spacer, and try that. any prefrances between the aluminum and the composites?

I would go with some type of composite and probably a phenolic for best heat separation.

 

[nick6704]

I'd go with a Pertronix drop in ignition first since you can wire it right up to your existing dizzy to start and they're much cheaper than a new system. For a conservative engine combo they work great and it's probably the best bang for the buck unless you get some kind of killer deal.

 

[68_stanger]

My spacer should be here tommorow, then give me a day or 2 to find the time to put it in, and I'll get back on here with an update.
thanks again

 

[68_stanger]

well I installed the 1'' phenolic spacer the other day, unfortunately it still does the same thing.

I think Im gonna see if the pertronix igition helps it. any other suggestions?

 

[MitchGT]

When the coil gets hot it can cause problems too. Where is your coil located? If it's already on the inner fender, then I don't know what to say. If it's not, then try to move it temporarily to somewhere a little cooler, and see if it helps.

 

[brin0357]

Advance the timing a bit

 

[mustangman1974]

I would pull a plug wire and check for spark before I did anything. If spitting you mean ingecting fule into the carb.

 

[GoinBroke]

Are you running headers? If so the problem sounds an awful lot like the starter is having a heat soak issue. I had a carb'd 88 which did the same thing and some heat shield wrap around the starter made it go away. Try that or a new starter and see what happens. You can always return the starter if the issue remains.