Hello chaps..

I've got a 99 Altezza RS200 with around 45k miles

It recently started to struggle on low revs.... up to about 3.5k... then would get better.....then the box changes gear and I'm back to square one again with not much power...

Attempted to search and read up a bit and did the following....

- Changed the spark plugs... The old Denso IK20s looked a bit old so I got a new set of IK20s in yesterday..
- There weren't any warning lights so I hope the coils are ok. Had a look at the coil packs while changing the plugs and they looked ok.. (As if I'll know by just looking!!)
- Also took a peek down the Spark plug holes and they looked pretty clean and dry (thinking that the rocker cover gasket may be leaking and mess up the plugs/coils)

Drove it today to work and back and still was rubbish..

- Took the MAF sensor off and cleaned it with isopropal alcohol aerosol, it looked quite dirty.
- Also disconnected the battery for 30 minutes (hope this resets the ECU)
- Had a look at the 2 lambda sensors to check if they were still plugged in. (Yes they were tight)

Then it got really cold and wet and I couldn't be arsed and came back in!

Hopefully cleaning the MAF and reseting the ECU will help.. I'll find out tomorrow when I drive into work...

Any one of you guru's have any ideas on what I could look at next...
I'm thinking of getting some new/secondhand coil packs next....
I take it the AS200/IS200 coils won't fit....

Many Thanks.

Update.

All good now... car's running as normal...

Turns out that the MAF sensor was dirty and therefore causing the car to not run properly..

After I cleaned it last night and put it back together, this morning it was back to normal again......

Thank god it wasn't anything more serious... off to buy another isopropyl alcohol aerosol now!

This is real common with Altezza's (3SGE). I find I have to clean mine every service to keep the car running at its best

Good news mate, glad it was nothing more expensive.