Part throttle flat spot in torque curve between 2500-3000rpm
Like the title says, I have a '00 Camaro M6 (stock), and at part throttle there seems to be a flat spot between 2500 - 3000 rpm. In other words, it pulls strong up to 2500, then feels a bit weaker, then pulls strong after 3000rpm. This is only at part throttle and is not noticable at full throttle.
Anyone else have the same issue?
I'm thinking of replacing the stock spark plugs (car has ~65k miles). Any other suggestions.
do you get this in all gears (meaning different speeds) but at the same rpm?
go put it on the dyno and actually see what it's doing.
although with that many miles....plugs are not a bad idea. at 50K miles 4 or 8 plugs were missing the platnum puck...giving the plugs a huge spark gap
This condition seems to occur in all gears between 2500-3000 rpm. And it only occurs between 1/4-1/2 throttle. Any more throttle than that and it's not noticeable.
I'll start w/ plugs and see if that fixes it.
Regarding the datalogger suggestion, what specifically did you have in mind to log?
The problem I was having is the car would pull hard until
about 2500 rpm & them it would lose power. It would lose
power from about 2500 - 3000 rpm. Once it got to 3000 rpm
it would run fine.
With my car it didn't matter if I was part throttle or WOT.
The problem was my K&N air filter. Aftermarket oiled air
filters will get oil on your MAF sensor & throw your readings off.
I used a ton of electric cleaner on my maf sensor & cleaned it
well with Q-tips. It worked like a charm & now my engine pulls
hard right through the rpm band.
You should give that a try. You can get electrical cleaner at
most auto part stores. Just be careful with the MAF wires.
If it was me, I would try it even before the spark plugs.
The problem I was having is the car would pull hard until
about 2500 rpm & them it would lose power. It would lose
power from about 2500 - 3000 rpm. Once it got to 3000 rpm
it would run fine.
With my car it didn't matter if I was part throttle or WOT.
The problem was my K&N air filter. Aftermarket oiled air
filters will get oil on your MAF sensor & throw your readings off.
I used a ton of electric cleaner on my maf sensor & cleaned it
well with Q-tips. It worked like a charm & now my engine pulls
hard right through the rpm band.
You should give that a try. You can get electrical cleaner at
most auto part stores. Just be careful with the MAF wires.
If it was me, I would try it even before the spark plugs.
Thanks for the suggestion. I use a paper filter, but could check this when i do the spark plugs (the plugs are probably due for replacing anyway).
Thanks for the suggestion. I use a paper filter, but could check this when i do the spark plugs (the plugs are probably due for replacing anyway).
Hmm, well it might not be the MAF sensor then.
I would still try it first. The MAF sensor is a lot
easier to get to than the passenger side spark plugs.
Then again, new spark plugs are always a good idea.
Good luck, Keep us updated & let us know what works.
Part throttle flat spot in torque curve between 2500-3000rpm 
