endrop - for all your online needs

Technical 1.9 m/j stutter and wosh noise at 1800 rpm

Currently reading:
Technical 1.9 m/j stutter and wosh noise at 1800 rpm

1

1fiatfan

New member
Joined
May 31, 2012
Messages
41
Points
8
Anyone know what causes this wer, wer, wer noise, or u could say, ka, ka, ka noise and the stuttering/pulling back at the same time between 1600-2000 rpm, (worst on light throttle) ? Lots of noise when lifting off accelerator at just above 2000 rpm, (its an automatic). EGR, MAP, MAF, air filter, boost pressure sensor have been replaced & I have checked all turbo and intercooler pipes I can get to whilst its up on ramps and from underbonnet. DPF looks fine on ECU scan. Found out prevous owner replaced all injectors and the inlet manifold. Thanks (its a 2005 16v 150 JTD auto)
 
Last edited:
This is right on the edge of my knowledge, so I may be wrong, but I believe that the unique injector code numbers need to be programmed into the ECU when they're changed. It might be worth a look at, to check that the numbers printed on them tally with what's programmed in.
 
Thx Doofer. I have been to my trusted mechanic today and he thinks the intercooler looks odd. It is a different p/n to the manual intercooler. Can someone else who has a 1.9 auto (Dave) look through your grill and tell me if their intercooler is curved at the bottom where it is sticking out past the condenser ?
 

Attachments

  • intercooler 002.JPG
    intercooler 002.JPG
    566.5 KB · Views: 250
  • intercooler 003.JPG
    intercooler 003.JPG
    638 KB · Views: 264
  • intercooler 005.JPG
    intercooler 005.JPG
    605.3 KB · Views: 367
Last edited:
I can't look at mine, as it's at its second home at the moment (in the bloody garage again - brake problems this time :cry:). A total nightmare, which is another topic in itself.
 
Thx again Doofer, but I need someone to look through the lower grill on a 1.9 auto as I have found out via eper that the intercooler is different on the auto, & so is the main radiator, (it has a built in oil cooler for the autobox). The 2.4 auto is also a different intercooler to the 1.9 auto.

re your brakes - perhaps you have the front o/s and rear n/s brakes dragging & wearing prematurely, that appars to be a very common Croma fault.
 
Thx Stuart, yes the pics are of the bottom of the intercooler taken through the lower front grill. So I have a blown out of shape intrcooler, the mechanic says it could be partically blocked and thats why the bottom has been blown out of shape. I have never heard of this happening before. Can anyone else think of any other reason how/why it could be blown of shape? As I undersand it their is no waste gate of these turbos so how is the excess pressure normally released? I am wondering if this is the reason, or if something else wrong has caused the intercooler to expand, I can only think of turbo back pressure that would be powerful enough to bend an intercooler out of shape. :(
 
I managed to take a couple of pics this morning - excuse the dead flies.
 

Attachments

  • 23.06.13 011.JPG
    23.06.13 011.JPG
    3.5 MB · Views: 125
  • 23.06.13 012.JPG
    23.06.13 012.JPG
    3.8 MB · Views: 113
The Turbochargers are VGT on all of them.Sounds like the injectors need trimming,but it wouldnt run if they did need trimming.Trimming is basically an adjustment for the differences in the injector soliniod coil resistances.I think the injector classification sorts this out in Fiat lingo.
 
The Intercooler, which was blown out of shape has been replaced, but its made no difference at all. I cant see anything written on the injectors to see what the code numbers are, there is some writing but its not in English. i can see the code numbers on ECU scan.

After searching the net I got the throttle body removed and cleaned out, still no difference. Due to the air being expelled noise I still think their is a hole in a pipe somewhere, however no holes can be found.

What should I be looking for on ECU scan to best have a hope of finding an odd reading?
 
You need to check that the printed numbers on them agree with what's programmed in. Is there any correlation between the printed numbers and what the software says?

If not, let me know before doing anything. I know I've checked mine and they agree. If yours don't then I'll get some photos of mine and details of what the software says, so you can see how it should be formatted etc.
 
Thank you. OK I have checked the injector details in the ECU and the 4 numbers are the same, but they are not installed in the same order, someone has swapped 2 around.
injector 1 - 78SCBK7AA
2 - 88ALCF5AA
3 - AHIGAKAAA - not sure if the I is a I or a 1, is just a straight line?
4 - 88Z3BF5AA

Now looking at the injector plug codes with a magnifying glass, working from standing in front of the car something is odd. Which is clyinder 1 in the ECU ? Assuming its the 1 on the far right, injector 3 & 4 have been swapped over, I guess I need to swap them back. But before I do I want to be sure this is better than just swapping the codes on them in the ECU.
 
Last edited:
In that case even every injector is in a different cylinder to what is showing on ECU scan :(. At least they are the correct injectors, bosch p/n 0445110 243. As the EGR valve has been replaced sometime ago, should the ECU somehow have been informed ? I read somewhere you had to re-set something via ECU scan if you replaced the EGR valve ?

I also have an oil misiting on the top hose that goes to the turbo, its the one directly in front of the oil dipstick finger hole, looking from the front of the car. Does any one else have this misting ? I am almost certain its not normal and proof a pipe is blowing. If I clean it off, within a few days its covered in a light oily residue again.
 
Last edited:
Could be you had a pressure problem in the cooling system ( explains the intercooler prob). It may have weakened a hose which leaks a tiny amount and covers the near area , had somethinh similar on a Marea once.
 
1fiatfan said:
In that case even every injector is in a different cylinder to what is showing on ECU scan :(. At least they are the correct injectors, bosch p/n 0445110 243. As the EGR valve has been replaced sometime ago, should the ECU somehow have been informed ? I read somewhere you had to re-set something via ECU scan if you replaced the EGR valve ?

I also have an oil misiting on the top hose that goes to the turbo, its the one directly in front of the oil dipstick finger hole, looking from the front of the car. Does any one else have this misting ? I am almost certain its not normal and proof a pipe is blowing. If I clean it off, within a few days its covered in a light oily residue again.
Click to expand...

Well there be your problem then. New rubber hose then.

I don't think the ECU needs to know anything about the EGR valve (that I know of anyway).

Get your injectors in the right order though - it sounds like someone took them all out, chucked them on a bench, then stuck them back in, without appreciating that the ECU does need to know about which one's where.

Presumably these numbers contain data about their characteristics - the ECU will then apply compensating factors to negate their quirks.
 
I hope it is that, but the pipe with the oily residue on it looks absolutely perfect, the odd thing is that the oily residue seems to only be on the top of that pipe. I am going to undo the clips take it off ASAP as maybe one of the round clips has pinched through that pipe, but perhaps its invisable until that clip is removed.
 
It may be just generally perished and porous - i.e. there's no big hole to see. Have you seen tyre sidewalls when they get old?
 
I took the pipe off (pipe 5 below) and it looks fine, but I noticed something else really odd, if you look at the below do your Croma 1.9s have anything connected to the small 1/4" offshoot pipe that comes off the top of pipe 4 at a right angle? The 1 with the arrow thing pointing at it below. Mine has an open pipe which does'nt seem right, unless their is a valve at the end. I rang a local Fiat dealer and they don't know, so over to you boys and girls to please take a look.

naread.exe

trpoint.gif

trpoint.gif

trpoint.gif

trpoint.gif

trpoint.gif
 
You must log in or register to reply here.

Similar threads

2
  • Question
Technical Starting issue 1.9 16v
Replies
12
Views
1K
s130
s130
Soufianejoe
Technical Gearbox and steering problem
Replies
3
Views
70
bugsymike
B
A
  • Question
General Fiat croma 2007 low rpm
Replies
10
Views
2K
A8I
A
P
Technical 1.9 MJTD 110KW rattling sound
Replies
2
Views
517
pityu234
P
C
Technical Fiat Croma 1.9 Multijet 2006 - P0685 power relay control circuit open
Replies
1
Views
620
s130
s130
Back
Top