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HI guys brought a 145 qv after having 5 155's lol cant beat an alfa
when i first got it it was quick i have since fitted a induction and a full stainless steel exhaust including decat and it now seems very hesitant through the rev range but this is not all the time.i know its not the maf as i have tested this any idea would be great thanks.
 

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Lamba?

I would of suggested the MAF but you have already tried it.
 

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The mods you've done will have altered the flow of gases through the engine, the TS is very picky about this and they need quite high back pressure to run smoothly.
 

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If you're sure the lambda and MAF are definitely OK (and you also don't have any problems with a possible dodgy coolant temp sensor) then with the mods you've done it would be a good idea to think about maybe getting a remap done so the ECU map is tailored to match the changes you've made to the cars intake and exhaust systems.
 
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