Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > Diesel Engines
Register Members CarsBlogs Help Calendar Mark Forums Read

Notices

Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines.

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

performance issues when car is hot and under load

Views : 316

Replies : 14

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Aug 8th, 2017, 07:43   #1
nstojanoski
New Member
 

Last Online: Aug 16th, 2017 11:56
Join Date: Jul 2017
Location: Skopje
Default performance issues when car is hot and under load

Hello,

I have Volvo S60 2002 D5 163Hp with a strange problem that we are trying to resolve.

For the past year me and my mechanic are trying to resolve e problem with this car of mine The car had 200,000km and we made full service for all the parts that needed to be changed + oil, all the belts, filters, brakes etc.

Then we started to find a solution for the problem that when i press the gas pedal all the way down i have 2-3 kicks from the turbo on around 2000-3000 rpm on and off again see the picture (sorry i don't have the RPM's) but 2nd Gear is from around 1800-3300 RPM's.



Then we change the gas pump in the tank under the backseat in the gas tenk from another S60 and changed the gas filter with new one. Car didn't wanted to start OK when HOT and we even changed the injectors got new BOSCH elements (BOSCH 0 433 175 310 DSLA140P1061)

Then i don't know what exactly we ware testing and we got the car to got without that stop and go in 2nd and 3rd gear but got problems on higher speed and when going uphill, i know he got the high pressure pump out and just cleaned with high pressure air and mount it back again and tight few bold.

So out next guess was the high pressure pump (the regulator where you plug the cable) + my friend got another turbo, so on the next test with the car he tried the new turbo and high pressure pump and now the car has NO PERFORMANCE AT ALL, we got out own turbo back but now i can feel that the turbo is starting to work around 2000rpm, it will got NOT WITH A KICK to 2500-2600rpm and after that i will maybe drive it to 3000-3200rpm (it will take 30-40 sec to go from 2600rpm to 3200rpm and before was 4-5 sec) and from time to time if you drive the car over 3000rpm it will go to limp mode and i had to turn it off/ and on again.

So my fried mechanic thinks it's not enough and i think we have some air leakage because the only strange thing that i noticed is that when the car is cold when i sit in it in the morning for the first new minutes the car has much better performance and when it gets to normal working temp the performance is dropping, also this is experiencing when i press the gas pedal all the way down and going uphill (when the car has more pressure and needs more power)

Any idea where to go from here and not spend tons of money

Regards
nstojanoski is offline   Reply With Quote
Old Aug 12th, 2017, 23:13   #2
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

Hi it seems that the turbo boost is not always responding to the vnt actuator from the ecu, when it dose boost it seems about correct, get a mityvac, vacuum pump and make shore the vnt leaver on the turbo is moving correctly
and check for any vacuum leaks,
in vida, move the vnt on and off with the engine runningand look at the vnt leaver on the turbo as you do it,
Dave
davebb is offline   Reply With Quote
Old Aug 12th, 2017, 23:43   #3
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

why is it not showing the rpm? as the box is selected ,
what is the max boost going to an at what revs, do a pull in 3rd gear, max boost should be around 3000-3500 rpm,
I Think your vnt mech in the turbo is not moving correctly and it gets harder to move as the car / turbo heats up
Dave
davebb is offline   Reply With Quote
Old Aug 14th, 2017, 20:10   #4
nstojanoski
New Member
 

Last Online: Aug 16th, 2017 11:56
Join Date: Jul 2017
Location: Skopje
Default

The VNT is changed and now is working in sync with the turbo, but we can't get performance from the car when it's working on normal temp. The last few weeks ware TOO hot here and the performance of the car was like the car has only 60hp not 160hp.

This days the temp is lower and I've made a few videos wit the car is cold (starting it after a night getting cold) and when the car hot after driving for 1 hour.

On this "when cold" video i could get even better performance but the road was not for fast driving, (i had to stop on 4000rpm in 3rd gear)but as you can see i can get to 5000rpm(2nd gear) which is not possible when the car is hot.

[YOUTUBE]https://youtu.be/hKfyVCJaM-I[/YOUTUBE]

This next video is when the car is driven for about 1 hour and the temperature outside is 22C (last few weeks was around 37-38 and the performance ware even worst). Here is when hot and as you can see the RPM's are loading slower and i had open road here and the pedal was pressed full.

[YOUTUBE]https://youtu.be/LipXpLf1KUs[/YOUTUBE]

I think it's something with rubber which is making performance issues when hot, but my mechanic think it's lack of fuel, because he checked for leaks and we don't have black smoke when pressing the pedal, also we have characteristics of not enough fuel on older disel cars.,

One of the first things we changed was the fuel pump which is in the fuel tank under the back seat, but the pump we got was from another car NOT NEW, the old one was just leaking and with this one we had some improvement but we think this is low pressure and we can't find not even in VIDA which the values should be.

Please take a look at the video and tell me if this is OK:

[YOUTUBE]https://youtu.be/IQCJNN27vSw[/YOUTUBE]

At this moment we don't have a car with the same engine to compare but on citroen i think the car is not working if the fuel pump is not making 1.8bars and in our case we don't have even 0.1-0.2 bars, if you put a finger the fuel will stop.

Any ideas before we spend out money on new fuel pump?

Forgot to write we changed the fuel filter when we changed this pump and once again few weeks ago when we tried to clean the fuel system with blowing high pressure air from the engine to the filter and the other way around.

Last edited by nstojanoski; Aug 14th, 2017 at 20:16.
nstojanoski is offline   Reply With Quote
Old Aug 14th, 2017, 21:18   #5
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

Hi what do you mean, did you remove the turbo and take out the VNT assembly,? and fit a new parts inside the turbo,
The VNT is changed and now is working in sync with the turbo

I was told that the tank pump should give about 10psi , as the HP pump on the engine will suck the fuel, have you put a pressure gauge on to that pipe,
log the main fuel pressure in vida, or any app, you can then see if it is correct ,
please let me know what you mean by , The VNT is changed and now is working in sync with the turbo, the VNT is inside the turbo
can you do another log in vida with

coolant temp
Inlet Air temp
boost pressure
atmospheric pressure
vnt
RPM
FUEL PRESSURE
Mass air flow,

Dave
davebb is offline   Reply With Quote
Old Aug 14th, 2017, 22:02   #6
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

Hi do you mean you have changed the VNT actuator on the side of the engine
above the starter motor,,
YOU NEED TO CLEAN THE VNT NOZZELS RING INSIDE THE TURBO,
YOU COULD TRY REMOVING THE DOWN PIPE FROM THE TURBO AND AND SPRAY TURBO, EGR, CARB CLEANER and leave over night ,
you can try some Turbo vnt cleaner that you put in the fuel tank, the in 4th gear from 40mph put your foot down all of the way and let the car go as fast as is safe then let the cr slow to 40 again do this many times to get the vnt vanes in the turbo moving,
also get some of this and run it in 1/4 of a tank of fuel,

http://www.ebay.co.uk/itm/Liqui-Moly...53.m2749.l2649

Dave
davebb is offline   Reply With Quote
Old Aug 15th, 2017, 10:49   #7
nstojanoski
New Member
 

Last Online: Aug 16th, 2017 11:56
Join Date: Jul 2017
Location: Skopje
Default

Sorry for my non-tech writing, and yes we changed the vnt on the side of the engine mounted on the engine block above the starter motor.



We have tried another turbo but the results ware the same. We have also taken the turbo on a machine to be checked and set right. the told us the turbo is OK. Turbo removed, EGR removed and intercooler removed and checked if it's OK

One point in time we have managed to fix the performance a bit, but went back after we removed the intercooler and tried another turbo.

Here are two videos with the parameters you asked, but on graphic display we can choose only 5(max) out of 8, after that we stoped and second part of the recording is with values of all parameters.

This is video on ringroad around the city:

[YOUTUBE]https://youtu.be/nmsfdJCK5r4[/YOUTUBE]

This second video is on a uphill, when i press on the RPM sensor around 1min we are in 5th gear with pedal all the way down. the car is just on 2k rpm and on 1:20 we are releasing and pressing the pedal so VNT is jumping a bit. On 1:40 the hill is over when i press on VNT sensor and RPMs are jumping ...

[YOUTUBE]https://youtu.be/4BlxzPgQ1Wk[/YOUTUBE]

Also i should tell you the car was driving for 2 hours and i can't get the kick and stop just slow smooth week performance.

Last edited by nstojanoski; Aug 15th, 2017 at 10:52.
nstojanoski is offline   Reply With Quote
Old Aug 15th, 2017, 12:10   #8
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

Hi that looks ok boost looks good not to high or to low,
this is what the turbo map settings are,
have you got a vac pump and gauge, to check all vac parts, engine mounts are vacuum controlled, and they do fail, and there is a vac actuator on the air box,
put the vacuum gauge on to the fitting on the actuator on the air box and make shore you have full vacuum at idle and the gauge needle is not flickering ,
some people have had a bad vac pump so only had vacuum at higher revs,
you need full vacuum at idle,
Dave
Attached Files
File Type: doc turbo map.doc (290.0 KB, 6 views)
File Type: doc atmos turbo limiter map.doc (284.5 KB, 1 views)
davebb is offline   Reply With Quote
Old Aug 15th, 2017, 12:38   #9
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

I have changed pics files,
Dave
Attached Images
File Type: jpg turbo map.jpg (195.5 KB, 3 views)
File Type: jpg atmos turbo limiter map.jpg (178.9 KB, 2 views)
davebb is offline   Reply With Quote
Old Aug 15th, 2017, 14:07   #10
davebb
Master Member
 

Last Online: Aug 16th, 2017 14:54
Join Date: Aug 2013
Location: Emsworth,hants
Default

Hi
when i press on VNT sensor and RPMs are jumping ...
Do press on with your Hand?, ore do you mean in Vida, if you mean in vida , rpm will change, fuel looks ok,
do vacuum tests,
Dave
davebb is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 05:00.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.