Freelander 1 TD4 Top-end vibration

bukko

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1,512

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Somerset (but I'm a Landanna)

• Mar 22, 2020

• #1

Ok I know It's a bit vague but just chucking this out there in case I get a few suggestions I can explore.
At around 3500 rpm - less if going up-hill, more sometimes - I get a kind of vibration like the car is going over ridges in the road a few feet apart.
If I come off the gas they stop and becomes completely smooth, back on and it restarts.
Only really seems to happen if the engine is struggling slightly for power.
Anything spring to mid?

 

GrumpyGel

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26,488

Location

Christchurch, New Zealand

• Mar 22, 2020

• #2

Fuel starvation?

Low pressure pump? If you have a diag kit, numbers have been posted on here as to what to expect.

 

andyfreelandy

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5,586

Location

Devon

• Mar 23, 2020

• #3

Fuel pressure check needed. Hp and Lp. Report back.

 

bukko

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1,512

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Somerset (but I'm a Landanna)

• Mar 23, 2020

• #4

Cool I'll plug in the Hawkeye and take it for a run.
I have a new lp pump already if I need to replace it.

 

hd3

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3,939

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Yorkshire

• Mar 23, 2020

• #5

maybe check vacuum hoses as well ..
as someone else had a similar issue .. and my hawkeye showed no issues ..
( like .. watching boost pressure when going uphill .. it looked normal )
turned out to be a small leak in a vac hose

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