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Ok I want to thank everyone out their for their suggestions on what I should do with my car that I got back from the bodyshop. THe Bodyshop is going to fix my car to just the way it was before it was wreck which was in great Condition.

OK HERE I what my problem is. My car is a 73 240Z with 72 SU whcih are water heated. I have an auto Tranny and the 3.54 Diff.

Ok when it is cold in the morning it takes for ever for my car to start and then i have to let it warm up to the normal running temp before the car is reliable. I know these cars are cold natured but that is redicules. It takes me about 3/4 mins to get the car to idle relaibly. I just had a guy that knows about SU tell me I probably Have an Vacum leak and it takes a few mins for the metal to expand to cover some hole where the leak is. I just want to get some peoples advise to help me make my old Z run better. COULD IT BE my old ignition which is still mechanical points or is it just he SU's. I have had the Valves adjusted to the right specs. WHAT is my problem. MY car will backfire threw the SU's so what is my problem?

Dustin Morris
 

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Are you using the manual Choke for cold starts?

> Ok I want to thank everyone out their for
> their suggestions on what I should do with
> my car that I got back from the bodyshop.
> THe Bodyshop is going to fix my car to just
> the way it was before it was wreck which was
> in great Condition.

> OK HERE I what my problem is. My car is a 73
> 240Z with 72 SU whcih are water heated. I
> have an auto Tranny and the 3.54 Diff.

> Ok when it is cold in the morning it takes
> for ever for my car to start and then i have
> to let it warm up to the normal running temp
> before the car is reliable. I know these
> cars are cold natured but that is redicules.
> It takes me about 3/4 mins to get the car to
> idle relaibly. I just had a guy that knows
> about SU tell me I probably Have an Vacum
> leak and it takes a few mins for the metal
> to expand to cover some hole where the leak
> is. I just want to get some peoples advise
> to help me make my old Z run better. COULD
> IT BE my old ignition which is still
> mechanical points or is it just he SU's. I
> have had the Valves adjusted to the right
> specs. WHAT is my problem. MY car will
> backfire threw the SU's so what is my
> problem?

> Dustin Morris
 

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Discussion Starter #3
> Are you using the manual Choke for cold
> starts?

Yes I do but it does not add that much of an advantage to the cold. It still dies with it engaged. the choke does work ok but not great.

Thanks anyways.

Dustin Morris
 

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When I ran the SUs, the choke always made my Z run just fine in cold weather. Something must not be working properly with the choke. Verify that when you pull the lever, that it is actually pulling down the choke on the bottom of the Carb. Here is one thing I did that cured all of my problems. Installed an optical sensor instead of points. And the biggy was the installation of an MSD 6-AL with Blaster 2 Coil. Once this was installed, I never had to use my choke again!

> Yes I do but it does not add that much of an
> advantage to the cold. It still dies with it
> engaged. the choke does work ok but not
> great.

> Thanks anyways.

> Dustin Morris
 

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Registered
Joined
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1,633 Posts
> Ok I want to thank everyone out their for
> their suggestions on what I should do with
> my car that I got back from the bodyshop.
> THe Bodyshop is going to fix my car to just
> the way it was before it was wreck which was
> in great Condition.

> OK HERE I what my problem is. My car is a 73
> 240Z with 72 SU whcih are water heated. I
> have an auto Tranny and the 3.54 Diff.

> Ok when it is cold in the morning it takes
> for ever for my car to start and then i have
> to let it warm up to the normal running temp
> before the car is reliable. I know these
> cars are cold natured but that is redicules.
> It takes me about 3/4 mins to get the car to
> idle relaibly. I just had a guy that knows
> about SU tell me I probably Have an Vacum
> leak and it takes a few mins for the metal
> to expand to cover some hole where the leak
> is. I just want to get some peoples advise
> to help me make my old Z run better. COULD
> IT BE my old ignition which is still
> mechanical points or is it just he SU's. I
> have had the Valves adjusted to the right
> specs. WHAT is my problem. MY car will
> backfire threw the SU's so what is my
> problem?

> Dustin Morris

Although my z is fuel injected, I became very intimate with su's in MG,s and Triumph,s.

My advice is either get rid ofthem or rebuild them.

Rebuild kits are cheap and really not difficult to install.

I bought a Clymer shop manual on su's, and it proved invaluable. Check it out.
 
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