Help limp mode Power loss up hills

[EODguy]

While driving if you undo your seatbelt you don't see "Fasten Seatbelt"?

Then barring having a bad sensor for the seatbelt it sounds like your cluster is not working.

A read of codes is necessary but pretty sure you will also be doing some work on your dash cluster besides whatever is causing you to go into limp mode (not DME )

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[ad01]

just looked in my engine bay
and ive noticed the box in the picture isnt been used ?

looking at picture number 1b and 1 pipes have been joined together

someone before me must have bypassed the box

would this cause my issues ?

[andrewwynn]

It doesn't soundike you are describing limp mode. You are describing lack of power. Somebody else with a diesel had similar problems recently but I can't remember the resolution but I think was either the high pressure fuel pump or turbo.

The car ran ok at low RPM or low torque demand but on hills it couldn't supply the torque demanded of it.

Limp mode doesnt come and go. Once triggered usually stays until you reset with a scanner. (but can reset after a cool down and restart). Also no chance no code + limp mode.

[ad01]

but if i drive x5 for a while never a problem ?
flys up any hill

[andrewwynn]

Intermittent problem just makes it harder to find . Can you get it to reproduce on demand?


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[ad01]

Originally Posted by andrewwynn

Intermittent problem just makes it harder to find . Can you get it to reproduce on demand?


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no
it happens in a blue moon

[wpoll]

Originally Posted by ad01

just looked in my engine bay
and ive noticed the box in the picture isnt been used ?

looking at picture number 1b and 1 pipes have been joined together

someone before me must have bypassed the box

would this cause my issues ?

Quite possibly yes.... This "box" is a vacuum reservoir and supplies vacuum to the turbo boost control. You need it. I'll bet that when/if you read the codes from the DDE (no DME guys..) you have codes for your boost control.

First thing I'd do is get a new vacuum reservoir and fit it.... It obviously failed and somebody decided it was cheaper to bypass it than replace it - which is true but that doesn't make it a good idea!

[ad01]

Originally Posted by wpoll

Quite possibly yes.... This "box" is a vacuum reservoir and supplies vacuum to the turbo boost control. You need it. I'll bet that when/if you read the codes from the DDE (no DME guys..) you have codes for your boost control.

First thing I'd do is get a new vacuum reservoir and fit it.... It obviously failed and somebody decided it was cheaper to bypass it than replace it - which is true but that doesn't make it a good idea!

thanks
yea i,ll order a new vacuum reservoir and fit it asap
and keep yee posted on the outcome

[andrewwynn]

Do you have "second level" scanner to read more than basic obd codes ?


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[ad01]

Originally Posted by andrewwynn

Do you have "second level" scanner to read more than basic obd codes ?


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yea i a a few good code readers
i,ll have a read tomorrow