max 30mph

mrtayto · Apr 13, 2020

I've just after getting a p38 2.5 dse auto ,when i brought it for a test drive everything was good.went to bring it for a drive today and it won't pass 30mph,not showing any warnings.
any one any ideas what might be wrong?

discool · Apr 13, 2020

A floor mat wedged under the throttle pedal ?

mrtayto · Apr 13, 2020

.
it wont pass about 2000rpm when in drive,will rev out no problem while in neutral

kermit_rr · Apr 13, 2020

are the turbo hoses in good order?

Tenebreaux · Apr 13, 2020

kermit_rr said:
are the turbo hoses in good order?

This. And the small pipe from the MAP to the inlet manifold.

mrtayto · Apr 13, 2020

i'm away from the car at the minute but will check the hoses tomorrow.
thanks

Datatek · Apr 13, 2020

Double check the pipe to the MAP sensor , it goes from the underside of the manifold to a little black unit bolted to the filter housing.
Other possibilities include in tank pump failure, binding brakes, binding handbrake.

mrtayto · Apr 13, 2020

i need to rev it up quiet high before it will start to move so maybe it is the brakes binding?

Tenebreaux · Apr 13, 2020

mrtayto said:
i need to rev it up quiet high before it will start to move so maybe it is the brakes binding?

I'm no expert but that sounds like gearbox to me.

Datatek · Apr 13, 2020

mrtayto said:
i need to rev it up quiet high before it will start to move so maybe it is the brakes binding?

Certainly a possibility

mrtayto · Apr 13, 2020

oh that doesn't sound good!
any way to check it out?

Datatek · Apr 13, 2020

mrtayto said:
oh that doesn't sound good!
any way to check it out?

Jack both wheels on one axle and see if they are free to turn.

mrtayto · Apr 13, 2020

Thanks,will try tomorrow, hopefully not the gearbox.

Tenebreaux · Apr 13, 2020

mrtayto said:
Thanks,will try tomorrow, hopefully not the gearbox.

When I first got mine it was a bugger pulling away in reverse from cold. New fluid in gearbox, transfer box and diff sorted it.

Datatek · Apr 13, 2020

It could perhaps also be in limp mode.

Tenebreaux · Apr 13, 2020

Datatek said:
It could perhaps also be in limp mode.

Wouldn't he get an engine light?

mrtayto · Apr 13, 2020

after ordering oil and filters for gearbox so hopefully that might help.Do the auto boxs give much trouble?

mrtayto · Apr 13, 2020

Datatek said:
It could perhaps also be in limp mode.

is there a way to reset it out of limp mode

Datatek · Apr 13, 2020

mrtayto said:
is there a way to reset it out of limp mode

If that was the problem, you would need diagnostics such as Nanocom to locate the cause of the problem.
Best start by checking the brakes.

Datatek · Apr 13, 2020

Tenebreaux said:
Wouldn't he get an engine light?

Not if the bulb has failed

max 30mph

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