starting problem

[digby130?]

hi guys,
my ibiza mk4 pd130 (FMIC, stage 2 clutch and remap with hybrid garett pd130) has a starting issue when hot...what do you think?

http://www.youtube.com/watch?v=JKElNeaO7gk


cheers!
JD

 

[Seatmann]

Is this a new problem that's just started or did it start when you got the car tuned? Has the fuel and air filters been replaced?

 

[Viking]

Using VCDS you can check crank speed which should be 280 rpm. If below this then remove battery leads and clean all body connection/earth points, then reconnect and protect with vaseline or suchlike. Then if the crank speed remains low check the battery, make sure it's giving enough amps to spin the engine over fast enough. If not then a new battery.

If the low crank speed problem still exists after these measures then it's a new starter motor.

 

[digby130?]

It started doing this after the new turbo...before the stage 2 map
The atage one map was on there for 50k!
I've already drop tested the battery and the results were fine!
Will have to get the crank speeds before I take to the garage to replace te starter motor!
I've also had the head and injectors cleaned (replacing the seals at the same time) and they are fine so reckon it can only be crank sensor or starter motor!
Also changed the engine temp sensor so it's not that either!!
Thanks for the replies fellas! Much apreciated!! If anyone has any more insight i would love it!

 

[Jimski]

Get Turk to check the beeza with VAGCOM JD, see if they are any codes?


Jimski

 

[Seatmann]

It could be a fuel issue though or the glow plug circuit messing about, I'm not sure if it works the same on the pd engines but on the older ones like mine you can unplug the coolant temp sensor and if it starts fine then it shows a problem with the glow plugs or wiring. It works because it forces the glow plugs to stay on for longer as a default thing if the sensor's unplugged. I wouldn't have thought the crank speed was an issue if it starts fine when cold as that's when it's more likely to be groggy at turning over.

 

[digby130?]

When the pd engines are hot, the glow plugs aren't activated, the engine has to reach 270 rpm to start, which it's not doing so didn't think it could be a glow plug issue... Where abouts is the coolant temp sensor? Is that te same as the engine temp sensor (at the back right)?
(ive already replaced the engine temp sensor)
I'll see if anyone is free Monday night near me to scan it

 

[Viking]

If you're not getting the crank speed required then see my post above. It's not the coolant sender, glowplugs, or suchlike.

When hot the starter motor windings cause increased resistance which slows the crank speed to below critical value and the engine won't start.

 

[digby130?]

If you're not getting the crank speed required then see my post above. It's not the coolant sender, glowplugs, or suchlike.

When hot the starter motor windings cause increased resistance which slows the crank speed to below critical value and the engine won't start.

my thinkings excactly!!

 

[Viking]

Crank speed should be 280 also, I think.

 

[digby130?]

ahh kk
cheers

ps i work for an insurance company...we're not all crap

 

[Viking]

And I drive a van, and you know what folk say about white van man eh...

 

[digby130?]

haha fair play

 

[digby130?]

Starter motor was replaced and I have a normal car again woop woop!!!

 

[mexicorich]

Has this been solved?
My PD130 also became bad to start when hot
I'm reading up on the Hammand Mod to trick the ECU into a different map if the engine can't reach 280rpm when hot
has anyone tried this?

 

[Lambro6]

Has this been solved?
My PD130 also became bad to start when hot
I'm reading up on the Hammand Mod to trick the ECU into a different map if the engine can't reach 280rpm when hot
has anyone tried this?

Starter motor was replaced and I have a normal car again woop woop!!!

.

 

[Seatmann]

Any other symptoms or just the starting?

http://www.myturbodiesel.com/1000q/multi/PD-adjust-Idle-TDI.htm

 

[Mr2turbo]

How much was the starter to be replaced?

 

[rob_65]

My remapped TDI Cupra is exactly the same when starting from hot.
Good to know replacing the starter motor will likely be a fix - thanks.

 

[Blanco92]

Just to point out there can't be faults other than the starter motor.

When I bought my old Octavia TDI I found it was never any good starting hot. It was fine even on freezing cold mornings.

The problem was the previous owner had fitted an incorrectly rated battery. It was too weak. Reason this problem didn't show from cold was because the glow plugs would function at low temperatures to assist the battery in starting the engine.

Fitted the correct one and it was perfect from then on.