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Flat spot 2400 to 2800

 
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JeremyC
Gold Cloverleaf


Joined: 06 Sep 2008
Posts: 583
Location: Petersfield, Hampshire

PostPosted: Tue Feb 24, 2009 12:50 pm    Post subject: Flat spot 2400 to 2800 Reply with quote

The engine just seem to go a bit less crisp and the exhaust note a bit 'farty' in the range 2400 to 2800.

I don't believe I ahev any exhaust leaks (especially as it passed an MoT on Saturday).

Any thoughts anyone.
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'93 Black 33 1.7 16v
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lee16v
16 Valve


Joined: 29 Jun 2005
Posts: 1429
Location: Devon, UK

PostPosted: Tue Feb 24, 2009 3:37 pm    Post subject: Reply with quote

Was it just when cold or all the time?

I think a lot of us suffer from flat spots at this time of year. I've had one on mine since I had it (6 years) and have never got to the bottom of it.
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john 33_16v
16 Valve


Joined: 27 May 2005
Posts: 1406
Location: herts, uk

PostPosted: Tue Feb 24, 2009 3:39 pm    Post subject: Reply with quote

Hi,

The only thing to do is to keep the revs well in excess of 3,000rpm Laughing

A duff lambda can cause flatspots around that range, but more likely to be a really awfull stammer.

Take it you got the steering rack sorted ok for the MOT then?

Cheers,

John
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If it aint broke, fiddle with it until it is!
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93 33 16v Mirtle Met
08 Fiat Grande Punto Exotica Red
90 Yamaha FZR600 Genesis- Silky white/red/blue
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Dr A. 33 1.5IE
Alfa Sprint


Joined: 23 Jun 2005
Posts: 133
Location: Nicosia - Cyprus

PostPosted: Wed Feb 25, 2009 12:41 pm    Post subject: Reply with quote

Hello everyone,

John what kind of fuel are you using? If for any reason you are using 98RON please use 95RON or at least use fuel from another gas station just in case is the fuel at fault!

Also I do have a question to all of you. Can the Lamda probe get a diy cleaning?

Thanks in advance
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1994 Alfa 33 1.5 IE Cat. 220.000Kms and still going strong!!! (Από την Αθήνα και τώρα στην Λευκωσία)
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