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Raulg

Wastegate control valve

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I have a 1997 V8 Turbo. The turbo boost gauge reads 0.

I noticed that the gauge needle falls to the left when the engine is off and comes up to the "0" line when the engine operates.

I thought the pressure sending unit (cylindrical part near the ECU) was the issue. I replaced it and there is no change.

I wonder if the wastegate solenoid valve would be the cause? 

From what I read here, if the solenoid fails, the turbo gets full boost. Therefore the gauge should read some level of pressure?

Where else should I look to troubleshoot?

Thank you for your help

Raulg

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Hi

Have you noticed any difference in how it drives? Does it cut out at high throttle and RPM?

What's the scale on these gauges? I would normally expect 0 to be atmospheric and for it to read below this at idle/cruise. A shut wastegate won't cause it to build boost any faster but it will cause it to overboost at full chat, at which point the ECU will go into protection mode and cut power.

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9 hours ago, Raulg said:

I have a 1997 V8 Turbo. The turbo boost gauge reads 0.

You'll get a better response if you post your question  in the V8 forum:thumbup:

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Cheers,

John W

http://jonwatkins.co.uk

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Sorted John 👍

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88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

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How is the performance of the car?  Does it feel completely flat or electric ?   If you have no boost control, the car will spin off down the road like a greased weasel..... if you have no boost, then the engine will feel really quite flat by comparison.

If there has been no notable change in performance, then I would be checking your gauge connection.  If it is reading 0 at idle, then I doubt that it is connected or receiving any real pressure from the manifold.


1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

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