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Old 1 Week Ago   #61
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Re: Cold start problem at first start

IT is posible the lamda 1 senzor to do this problem ,
poor mixture ?
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Old 1 Week Ago   #62
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Re: Cold start problem at first start

The lambda sensor is not ready at cold start. Starting is no closed loop control, itīs purely piloted. What about the battery? I had similar problems one mine (but it was a 1,2l), used platinium sparks, made it slightly better, then waited with ignition on some seconds before starting, but this made it only sometimes better. Then my battery died and I replaced it by a 50Ah battery from the diesel and since then the problem didnīt reappear...
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Old 1 Week Ago   #63
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Re: Cold start problem at first start

have this problem for long time i try everything about fuel injection sistem, sensors, batery, batery strap etc.

In the future i will try with another ecu , but now i will try more custom fuel maps.

Dont know why she start and work ok for aproximaly 1 year from the custom map i put , and now reapear
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Old 5 Days Ago   #64
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Re: Cold start problem at first start

I have a 1.2 litre POP.

Twice, when it hasn't been driven for a week and the second time not driven for 24 hours, it has not started without a lot of cranking. The engine turned over fine.

The first time this happened I gave up on the starter motor and roll started down a hill and it still took a while to fire up. I drove for five minutes fine, stopped for dinner nearby, then again it wouldn't start without maybe six attempts, a friend says it blew a bit of smoke on starting.

Then 10 days (900km) later it wouldn't start again, I cranked it about 15 times, it spluttered a bit a few times and then fired up and went fine.

I thought it might be dodgy fuel, water in the fuel, or fuel evaporating somewhere.

It has happened on hot days when the car has been sitting in the sun.
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Old 5 Days Ago   #65
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Re: Cold start problem at first start

One possibility is a slightly leaking injector. The fuel rail doesn't automatically depressurise on shutdown, so if one (or more) of the injectors isn't completely closed, fuel could leak into the cylinder, causing a wet, smoky start.
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Old 3 Days Ago   #66
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Re: Cold start problem at first start

Quote Originally Posted by Oztrekking View Post
I have a 1.2 litre POP.

Twice, when it hasn't been driven for a week and the second time not driven for 24 hours, it has not started without a lot of cranking. The engine turned over fine.

The first time this happened I gave up on the starter motor and roll started down a hill and it still took a while to fire up. I drove for five minutes fine, stopped for dinner nearby, then again it wouldn't start without maybe six attempts, a friend says it blew a bit of smoke on starting.

Then 10 days (900km) later it wouldn't start again, I cranked it about 15 times, it spluttered a bit a few times and then fired up and went fine.

I thought it might be dodgy fuel, water in the fuel, or fuel evaporating somewhere.

It has happened on hot days when the car has been sitting in the sun.
Thanks , but the problem is only if she stay much time , try to start and die in 2-3 sec, and at the second try it start ok, and all day work ok and start , wherever is stay 8 hours the stay fine.

It is about mmixture air from manifold , because if u spray start spray start for first time, if u hack the map senzor and freze of them , start ok ....
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Old 3 Days Ago   #67
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Re: Cold start problem at first start

Quote Originally Posted by jrkitching View Post
One possibility is a slightly leaking injector. The fuel rail doesn't automatically depressurise on shutdown, so if one (or more) of the injectors isn't completely closed, fuel could leak into the cylinder, causing a wet, smoky start.
Dont have this ,i put new injectors, try with new fuel line , not about depresurise. Last year try everything , and find a custom map and work about 1 year, and now the same problem apear

How a bag Ecu work ?
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