3200GT - Loss of Power

[dutchy]

I've recently had my cam belts changed and now seem to have a drop in power as I accelerate hard in 3 & 4 gear going through about 5000 revs (very brief drop).
Has anyone had any similar experiences of this?

I had some thing similar on another car and it turned out to be the air flow meter but I've not heard of this problem on a 3200 GT.

[mr_tony]

Hi dutchy - Auto or Manual?

Assume as it's in only one gear it's not the clutch!

Sounds possible it's an air flow issue - onyl option I would think is to get down the garage and get someone to take a look with the diagnostics box...

[maser sod]

sounds like classic AFM failure

dunno what make they are on the 3200GT, but there is a well known problem with some recent Bosch AFMs used in Italian cars. Basically they are crap (and overpriced).

Unless of course you are actually hitting the limiter without realising it (the ECU will cut off the fuel injection). I'm guessing you'd have ruled that out already.

[dutchy]

Its gone into the dealer for the safety recall, so I've asked them to have a look at the diagnostics!!

I assume there must be 2 air flow meters on the V8??

Will let you know!

[Nigelo]

I don't see how it can be a problem with an air flow meter as they are not fitted to 3200s. Pressure sensors upstream and downstream of the throttle, charge (air) temp sensor, anti-knock sensors and a boost control solenoid, yes but AFM no.

If I understand correctly, you are describing a full throttle flat spot @ 5000 rpm after a cam belt change that did not exist prior. Worst case is incorrect valve timing introduced with the belt change. More likely is engine / chassis / engine management unit earthing probs and therefore suggest resistances are checked first.

HTH

[dutchy]

Nigelo said:

I don't see how it can be a problem with an air flow meter as they are not fitted to 3200s. Pressure sensors upstream and downstream of the throttle, charge (air) temp sensor, anti-knock sensors and a boost control solenoid, yes but AFM no. If I understand correctly, you are describing a full throttle flat spot @ 5000 rpm after a cam belt change that did not exist prior. Worst case is incorrect valve timing introduced with the belt change. More likely is engine / chassis / engine management unit earthing probs and therefore suggest resistances are checked first. HTH

Thanks for that, I did not realise there was no air flow meters fitted!!
Hopefully something will show up on the diagnostics. If it was valve timing surely this will be a huge power drop??
I hope it is something straight forward!