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Old 3 Weeks Ago   #1
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1.9 JTDM trouble starting - Please help

I've just purchased a 1.9 grande punto, 1.9 jtdm


Anyway it has trouble starting up from both cold & hot (So assume its not glow plugs)
No fault codes in ECU.
Runs absolutely fine once started, no misfire etc.


It just takes about 45 seconds to fire up.


It has full Fiat service History and cam belt has been changed, only about 80k miles.


what's your thoughts?


Crankshaft sensor? (Although would this cause problems whilst running?)
Test injectors - (leak off test?)


No sure where to start
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Old 3 Weeks Ago   #2
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Re: 1.9 JTDM trouble starting - Please help

Hi, and welcome,

ok - so no codes,

does it smoke on start-up ?
if no smoke then it's burning cleanly..NOT the plugs.

have you cycled the plugs? (to build heat).. good diagnostic tool

after that you'd want to look at what the ECU's seeing..,
Charlie - Oxford
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Old 3 Weeks Ago   #3
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Re: 1.9 JTDM trouble starting - Please help

Hi

Thanks for quick reply.

No smoke. Drives absolutely lovely.

Would the glow plugs be a possible cause if it still has trouble starting after running for 30 mins +?

How do I do the ecu test?
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Old 3 Weeks Ago   #4
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Re: 1.9 JTDM trouble starting - Please help

Quote Originally Posted by thunnisett View Post
Hi

Thanks for quick reply.

No smoke. Drives absolutely lovely.

Would the glow plugs be a possible cause if it still has trouble starting after running for 30 mins +?

How do I do the ecu test?
the basic theory is that COMPRESSION is enough to get diesel burning = the engine running,
glow plugs just add local HEAT..to aid the initial burning

once the engine is WARM thay should do very little,

Diagnostics;
plug in a device to the OBD port - like when you scanned for codes,
then look up all of the temperature sensor readings,
if it thinks it's -40'C it'll do odd things..for example

we tend to use MultiECUScan,

I'll give a link to similar Multijet posts,
http://www.fiatforum.com/grande-punt...se-help-4.html
charlie
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Last edited by varesecrazy; 3 Weeks Ago at 08:45.
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Old 3 Weeks Ago   #5
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Re: 1.9 JTDM trouble starting - Please help

Thanks Charlie

I'll try that

Also on that tread its suggested to test the battery startup crank voltage. I'll give that ago as well
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Old 3 Weeks Ago   #6
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Re: 1.9 JTDM trouble starting - Please help

the engine relies on cranking speed to build pressure in the fuel rail..

if too low it doesn't inject.. and you say it doesn't smoke when it eventually starts - this all makes sense,
Charlie
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Old 3 Weeks Ago   #7
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Re: 1.9 JTDM trouble starting - Please help

JTD engines need the glowplugs even when hot..
My bet would be glowplug(s).
Assuming the battery is OK.
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Last edited by Peter Pick-Up; 3 Weeks Ago at 12:05.
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Old 3 Weeks Ago   #8
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Re: 1.9 JTDM trouble starting - Please help

Quote Originally Posted by Peter Pick-Up View Post
JTD engines need the glowplugs even when hot..
My bet would be glowplug(s).
Assuming the battery is OK.
but a couple of COLD cylinders..that would normally make "smoke" from unburnt fuel.. O.P. says it clean
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Old 3 Weeks Ago   #9
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Re: 1.9 JTDM trouble starting - Please help

It should have give a code, right.
Lot's of things can be bad, f.i. bad/worn injectionpump, but that should trigger a code too....??
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Old 3 Weeks Ago   #10
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Re: 1.9 JTDM trouble starting - Please help

That's why I'm stumped. No codes and I'm using an expensive CReader professional machine.

I'm hoping it's the battery.

I'll test the battery in the week as I need to get a new injector T-Piece as broke one
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Old 3 Weeks Ago   #11
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Re: 1.9 JTDM trouble starting - Please help

If the battery is able to crank for 45 seconds, it'll be all right...
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Old 3 Weeks Ago   #12
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Re: 1.9 JTDM trouble starting - Please help

Quote Originally Posted by thunnisett View Post
That's why I'm stumped. No codes and I'm using an expensive CReader professional machine.

I'm hoping it's the battery.

I'll test the battery in the week as I need to get a new injector T-Piece as broke one
so where are you / the car based..??
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Old 3 Weeks Ago   #13
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Re: 1.9 JTDM trouble starting - Please help

The car on my drive but when I was checking the injectors one of the T-Pieces must have been brittle and snapped. Now when I start the car it pisses diesel everywhere.
Just waiting for a new injector T-Piece to arrive and then I can test the battery then move into other things.

I'm in East Sussex- St leonards
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Old 2 Weeks Ago   #14
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Re: 1.9 JTDM trouble starting - Please help

Cold crank on battery is around 10.5 so think the battery is ok

I noticed today the starter motor was turning slowly on a few attempts so wondering if this is the cause.

Have ordered a new one.

Any instructions/ guides how to fit? And is it easy for a noob? Or shall I get a mechanic? (Approx what labour time is it)

1.9 d, 120 bhp
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Old 1 Week Ago   #15
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Re: 1.9 JTDM trouble starting - Please help

Starter motor changed but made no difference.

Have the injectors tested Monday (leak back test)
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