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Author Subject: Power dip after start for few minutes
padge

Newbie

Location: chester

Registered: 17 Oct 2007

Posts: 16

Status: Offline
Post #1
Anyone got any ideas on this?

When I first start the car from cold, it starts fine, idles fine etc. Once I start off, after about 30 seconds the engine starts to lose power, as if I've just pulled back off the accelerator (but I havent). If I keep the accelerator exactly where it is, the car slows right down, revs drop, and then after a second or two it picks back up and doesn't do it again.
I had a new lambda sensor fitted a bit back (for another problem) so I know it's not that.
I've tried it with the map sensor disconnected and it still does it, so I'm guessing that's not that either.

Any ideas anyone?
Posted 2nd Aug 2011 at 18:05
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manthos

Seasoned Pro

Location: Norwich

Registered: 29 Apr 2009

Posts: 1,966

Status: Offline
Post #2
Idle control valve??

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Posted 2nd Aug 2011 at 18:13
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mattgti6phase2

Seasoned Pro

Location: inside my 6 abusing the tarmac!!

Registered: 16 Jul 2010

Posts: 2,371

Status: Offline
Post #3
manthos wrote:
Idle control valve??


No icv only controls the idle. If the power is fading away then it could be the TPS it may think it's shut when it's open Dunno

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Posted 2nd Aug 2011 at 22:10
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swiftyboi006

Seasoned Pro

Location: Maidenhead

Registered: 12 Apr 2010

Posts: 2,110

Status: Offline
Post #4
What mattgti6phase2 said

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Posted 4th Aug 2011 at 21:07
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cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

Posts: 6,496

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Post #5
Green coolant temp sensor Yes

I presume it goes away when warm?

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Posted 4th Aug 2011 at 23:03
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