ByronBayChris Posted 29June, 2016 Report Share Posted 29June, 2016 Help me out here.When cold, the 356 will crank happily, but not fire. If I attach an external 6v battery to the one in the car, it starts immediately, but only when I attach +ve to +ve and -ve to ground strap.HOWEVER.....when warm it starts first time. Link to comment Share on other sites More sharing options...
tazzieman Posted 29June, 2016 Report Share Posted 29June, 2016 Slightly stronger spark. Take the old battery out and try cold start with the new one.Of course being a 356, you may have other tuning issues! How's your points?When warm , old cars are easier to start , as a rule . Link to comment Share on other sites More sharing options...
Airhead Posted 29June, 2016 Report Share Posted 29June, 2016 You running webers or solex? You really have to find the sweet spot with the accelerator peddle. Too little = nothing. Too much is a flood. And when it kicks you have to tickle it enough to keep it going to get some warmth into it.16 years of practice and sometimes it's still a lottery. Link to comment Share on other sites More sharing options...
tazzieman Posted 29June, 2016 Report Share Posted 29June, 2016 If it turns out to be a carb issue , one thing the old benz guys say is that modern fuel evaporates completely from the bowl , so you start "dry" each day. A different behaviour from the fuels 50+ years ago, with a different start procedure. YMMV! Link to comment Share on other sites More sharing options...
ByronBayChris Posted 29June, 2016 Author Report Share Posted 29June, 2016 I have found that opening the throttle fully kicks it in the best. But only for five "ra ra ra" s.Running Webers Link to comment Share on other sites More sharing options...
tazzieman Posted 29June, 2016 Report Share Posted 29June, 2016 Do you even have cold starts up at sunny Byron? Your cold start is my hot start! Link to comment Share on other sites More sharing options...
ByronBayChris Posted 29June, 2016 Author Report Share Posted 29June, 2016 Do you even have cold starts up at sunny Byron? Your cold start is my hot start!It's been as low as 12 degrees here recently........that's damn cold ! You running webers or solex? You really have to find the sweet spot with the accelerator peddle. Too little = nothing. Too much is a flood. And when it kicks you have to tickle it enough to keep it going to get some warmth into it.16 years of practice and sometimes it's still a lottery.Running 40mm webers on a 912 engine. Link to comment Share on other sites More sharing options...
clutch-monkey Posted 29June, 2016 Report Share Posted 29June, 2016 If it turns out to be a carb issue , one thing the old benz guys say is that modern fuel evaporates completely from the bowl , so you start "dry" each day. A different behaviour from the fuels 50+ years ago, with a different start procedure. YMMV!i have this with the datsun. i turn the ignition on and let the fuel pump fill the bowls on the carbs (can hear it slow down as they start to fill up). then foot to the floor and crank it over Link to comment Share on other sites More sharing options...
tazzieman Posted 29June, 2016 Report Share Posted 29June, 2016 i have this with the datsun. i turn the ignition on and let the fuel pump fill the bowls on the carbs (can hear it slow down as they start to fill up). then foot to the floor and crank it overLand Rover too. Now we will be castrated for derailing the thread!Chris - 12C is a good maximum for this time of the year. But unlike C'berra it doesn't go below 0 overnight :<) Back to the Webers. Are they Italian or the Spanish ones? Link to comment Share on other sites More sharing options...
ByronBayChris Posted 29June, 2016 Author Report Share Posted 29June, 2016 Land Rover too. Now we will be castrated for derailing the thread!Chris - 12C is a good maximum for this time of the year. But unlike C'berra it doesn't go below 0 overnight :<) Back to the Webers. Are they Italian or the Spanish ones? Italian, Spanish or Chinese ? Link to comment Share on other sites More sharing options...
tazzieman Posted 29June, 2016 Report Share Posted 29June, 2016 Italian, Spanish or Chinese ?Well you can read the label, but if I was an elderly fraulein I'm not sure I'd want one from any nationality other than French on top of me Link to comment Share on other sites More sharing options...
Airhead Posted 29June, 2016 Report Share Posted 29June, 2016 Lot of people have a small electric pump to prime the carbies. Flick on- fill carbies - Start car flick pump off and let it run on the mechanical pump.Or do what I do and run an electric pump all the time. Check your fuel pressure with an inline gauge. Webers need accurate consistent pressure (cant remember the No.) Also make sure pump jets correct size. Too big and they flood easily. Too small and the car won't accelerate cleanly and stutter when you press the peddle.Don't even start to ask me about correct sizes for idle jet/air correction/main jet/emulsion tube/choke size etc etc. Link to comment Share on other sites More sharing options...
ByronBayChris Posted 29June, 2016 Author Report Share Posted 29June, 2016 Lot of people have a small electric pump to prime the carbies. Flick on- fill carbies - Start car flick pump off and let it run on the mechanical pump.Or do what I do and run an electric pump all the time. Check your fuel pressure with an inline gauge. Webers need accurate consistent pressure (cant remember the No.) Also make sure pump jets correct size. Too big and they flood easily. Too small and the car won't accelerate cleanly and stutter when you press the peddle.Don't even start to ask me about correct sizes for idle jet/air correction/main jet/emulsion tube/choke size etc etc.fuel is 3psi...... Thanks for the other info...... Link to comment Share on other sites More sharing options...
WOKA Posted 29June, 2016 Report Share Posted 29June, 2016 One thing I've always wanted to know.. Is the We-ber or Web-ber..?Back on track.. Link to comment Share on other sites More sharing options...
WOKA Posted 30June, 2016 Report Share Posted 30June, 2016 One thing I've always wanted to know.. Is it We-ber or Web-ber..?Back on track.. Link to comment Share on other sites More sharing options...
tazzieman Posted 30June, 2016 Report Share Posted 30June, 2016 Lot of people have a small electric pump to prime the carbies. Flick on- fill carbies - Start car flick pump off and let it run on the mechanical pump.Or do what I do and run an electric pump all the time.In my LR () there is a Repco electric pump the guy installed in 1980. It is the only pump. On the coldest day , I squeeze the throttle slightly after letting the pump tick for about 10 seconds. Vroom (but only if the battery is well charged)Benz guy said another cold start way is to crank for 10-15 seconds, then pump fully ~3 times and start. That has worked for me with 50 year old non rebuilt carbies in cars with mechanical pumps only! Link to comment Share on other sites More sharing options...
Merv Posted 30June, 2016 Report Share Posted 30June, 2016 Chris- I use three-four pumps on the accelerator on cool mornings and it starts straight up. I have an electric pump I fitted as a back up but never need to use it. I have spent hours re-building the carbs with particular attention to the float levels and the squirt volumes in transition. However, in your case I assume the points are set right (and insulated from the distributor case at the rear) and that the condenser and coil are on spec? Link to comment Share on other sites More sharing options...
tazzieman Posted 1July, 2016 Report Share Posted 1July, 2016 Getting back to Chris' original post , might it be just the battery? Link to comment Share on other sites More sharing options...
jnr356 Posted 1July, 2016 Report Share Posted 1July, 2016 check the valve clearances as wellhad a cold start problem (fine hot)with my twin webers.valves were too tight Link to comment Share on other sites More sharing options...
tazzieman Posted 2July, 2016 Report Share Posted 2July, 2016 Chris gets a bill for $2000 fettling and realises he should've bought a new battery Link to comment Share on other sites More sharing options...
ByronBayChris Posted 2July, 2016 Author Report Share Posted 2July, 2016 Battery being swapped next time I get back to the car.....then the fettling bill Link to comment Share on other sites More sharing options...
symsy Posted 2July, 2016 Report Share Posted 2July, 2016 Chris you cannot expect a car to run with a BBQ for a carbie..I know I know slap me hard when you see me ...Question .. seriously condenser have you checked it.Next , a non return valve in the fuel line after the filter.. I find this has helped on the Esky and I the baby is shivering in the 9C morning this weekMy start works like dorothys ruby slippers, just put that heal firmly on the floor , click that pedal to the metal three times and then theres no place like home…. with no throttle..If it floods as sometimes is the case in the Northern Rivers… foot to the floor like a demon and crank the baby, hot or cold and it normally clears and starts after a few turns Link to comment Share on other sites More sharing options...
tazzieman Posted 2July, 2016 Report Share Posted 2July, 2016 My start works like dorothys ruby slippers, just put that heal firmly on the floor ,A European Union of German and Italian/Spanish/Chinese parts is always going to be an experiment . Whereas Symsy it's all in the same inbred family in your vehicular stable , unless you sneakily decided to dip your heel into the foreign parts bin.Symsy's got a bitzer , Symsys got a bitzer Link to comment Share on other sites More sharing options...
ByronBayChris Posted 7July, 2016 Author Report Share Posted 7July, 2016 So results.............the 6v battery was showing 6.03v. Put it on the trickle charger for 24 hours, got the battery to 6.5v and the car started first time when cold.No fettling required.Thanks as always. Link to comment Share on other sites More sharing options...
tazzieman Posted 8July, 2016 Report Share Posted 8July, 2016 Link to comment Share on other sites More sharing options...
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