70 2.2T (zenith carbs) hot start problem

[Pmc007]

Hi guys

Engine has just been entirely renewed, CDI refreshed, but car maintains a problem. It doesn't start when its hot..that's a real pain...a restored car and engine and always being afraid of stoping and staying in the middle of traffic with a broken "new" car!! So what should I look for?

Thanks!

[gearjam]

I think we need more info. Does it crank over when hot? Are you opening the throttle when cranking. Many possibilities here so please give more info

[eaton]

Maybe I'm doing it wrong, but I always floor the throttle on hot start. Car has Zeniths. Starts great hot, unless I don't floor it.

[fizeus]

As requested you should give us some additional infos about the problem.
Have you tryed hooking a timing light to check for sparks?
Is your timing/dwell correct?
What if you try sprying some carb cleaner when it do not start?

[edmayo]

Maybe I'm doing it wrong, but I always floor the throttle on hot start. Car has Zeniths. Starts great hot, unless I don't floor it.

Agree completely,,,,,hot engine,,,, open throttle to let in more air,,,,do not pump it tho!!!

[Stretch32]

What I do with my '71T 2.2 with Zeniths:

As I turn the key and notice my engine isn't starting quickly (as it normally does) I will start to ease the pedal to the floor, while still cranking, and eventually the engine will start. Sometimes I don't get the pedal all the way to the floor but generally it will be on the floor when it finally starts. Also, I keep the hot start issue in mind if the car was at operating temperature when I shut it down and it's been between about 15 and 45 minutes since then. This is the window where I normally have issues and have to use the "pedal to the floor" trick.

Basically, the car is getting too much non-atomized fuel for the given conditions and by putting the pedal all the way down it's drawing all that excess liquid full down the carbs quicker and getting to atomized (burnable) fuel allowing the engine to start.

There are some things to consider. Make sure your carbs are in good working condition, with good tuning and gaskets, etc. If they aren't you may have other issues causing your problem.