car sometimes is taking a while 2 start, just turning over

[wallace78]

it dosent do it all the time but is getting worse is it the glo plugs or could it be something else guys,cheers my car is an a4 2.5 quattro

 

[vrbob]

My dads A4 2.5tdi did this for ages turned out the people who did the cambelt before he bought the car didnt time it properly and it was almost 2 teeth out of time. So when he got a new cambelt fitted and the car was timed correctly it now start on the button everytime.

 

[jojo]

Highly unlikely glowplugs in this weather, Coolant Temp Sensor, crank sensor, MAF sensor or dying battery.

 

[wallace78]

thnx ill hav my m8 hav a look n c if its that :icon_thumright:

 

[wallace78]

i just changed the temp sensor so ill check the rest cheers jo jo

 

[wallace78]

but i bought the cheap temp sensor think ill buy the proper one n try it first

 

[quattrojames]

I'll move this to the B6 section.

I'd get the fuel pump timing checked with VCDS too.

 

[Turkster]

try re heating the glow plugs and then fire it up.

 

[wallace78]

cheers james

 

[wallace78]

tried that turkster m8

 

[stu_m]

Not sure if this affects the 2.5 engine but a dodgy light switch can cause starting problems I've only seen it on the 1.9 up to now

The switch causes a fault in the off position and the car will take a few turns before it fires but if you put the side lights on it will fire first time

Worth a check seen as though its easy to check and free

 

[AlexGSi2000]

The bloke who owned my 2.5 before me stated that he had fitted a new battery due to starting issues.

He said the thing would crank (not really any slower than usual) but wouldn't fire - a new battery sorted it out....

 

[dope]

Not sure if this affects the 2.5 engine but a dodgy light switch can cause starting problems I've only seen it on the 1.9 up to now

The switch causes a fault in the off position and the car will take a few turns before it fires but if you put the side lights on it will fire first time

Worth a check seen as though its easy to check and free

My money's on this

 

[Turkster]

My money's on this

Iv not seen this one but will wait for the result as its not ruled out on other VAG cars.

 

[stu_m]

Iv not seen this one but will wait for the result as its not ruled out on other VAG cars.

really? its a pretty common problem there was even a thread not so long back for a replacement headlight switch on ebay for £20 and a few people mentioned it on there

 

[wallace78]

I put a proper sensor in and its made a big difference well pleased

 

[janis-karklins]

I have a similar problem on my 2.5TDI. Sometimes, when motor is warm, it needs some time to start. When cold, never had a similar problem. And when warm, not always, just some time.

Battery fitted new last summer, no faults on VAG-COM. No idea what to else look for

 

[wallace78]

Will keep u up 2 date with mine 2 see if thus works