Long crank problem when cold. Once it started no problem even 2 hours later


#1

Hi everybody. I’ve been struggling a lot lately. I have a gaz vw golf 2003 2.0 I bought it a month ago. The car wont start in the morning if it’s too cold. But if it’s not that cold like -5° the car start after 10 or 20 long cranking and immediately stall after, it will also stall when when I press the gas pedal. After that it will start easily and I will be fine for the day. It will start like a normal car all day long. The problem is when I don’t start it for a long period of time, like overnight or after more than 4 hours its gonna be the same. The battery and the starter has been changed. I thought It was the mass air flow i changed it. These are all the things i changed. Fuel pump, fuel filter,i scanned the car there was codes for rpm sansor, camshaft position sensor, maf, misfires in all cylinder and open circuit for o2 sensors. I know the car has no catalyctic and o2 sensors are disconnected.
When I changed the camshaft position sensor, all the codes disappeared and I only have the o2’s sensor codes now. Pardon my English I’m from Montreal…


#2

These are the codes.


#3


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#6

The next time the engine doesn’t start, turn the ignition switch on so the dash lights come on for two seconds, and then turn the ignition switch off.

Repeat this a half dozen times and then try starting the engine.

If the engine starts right up, there’s a problem with the anti drain-back valve on the fuel pump.

Tester


#7

Given all those codes… I’d guess the ECU needs replacing. That’s just too many problems for one car. I am surprised it runs at all.


#8

When I changed the camshaft the codes disappeared. Except the o2 sensor.


#9

A bad engine temp sensor can also cause extended cranking when cold if it is misjudging what the engine temperature is to set the fuel ratio. There should be a reading on your diagnostic computer to tell what temp the sensor sees and you can compare that to ambiant. Also a leaky fuel injector can cause an extended crank.


#10

I already tried it I dont thing it’s a fuel problem. This morning I even disconnected the fuel connector beside the engine to see if it would splash and when I turned the ignition on It did splash


#11

The temperature sensor problem disappeared when I repaired the camshaft. My last supposition was the injectors or the ignition coil


#12

Is it possible to take a ecu from an other golf at the scrap and put it on mine?


#13

So which diagnostic codes do you currently have coincident w/the long-crank problem you are asking about.