Nissan AD slow speed

[pwuser157297521685]

I use AD 2007 1300cc in petrol. Completely updated and tuned. In excellent condition. Problem is that it does not speed up quickly. Its slow to gain speed. And especially on motorway, where road is slightly upwards, my car's speed comes down in spite of my pressing the accelerator. And when the ac is on, the problem is more. Any suggestions please? Tuning already done but didn't help.

[capsat]

before doing anything else change the transmission fluid and share maintenance history if any ?
transmission dipstick has the fluid specs punched or an sticker at round stopper.
you can also read Trans/Axle data of your vehicle from ID plate in engine bay. Transmission code can be googled for required fluid specs.

[ali_77]

Get your catalytic converter cleaned.

[sleeper]

When were the spark plugs changed last?

[pwuser157297521685]

Sir what common name the local mechanics use for catalytic converter? Where is it situated? Isn't it cleaned in routine tuning?

[ali_77]

Common name is catalytic converter... some may call it "cat". It is located in exhaust system near exhaust manifold.
u can get it cleaned from some suitable place in about 2000. My Nissan AD started behaving almost the same as yours. And Alhamdulillah all went fine after cleaning of catalytic converter.

Some friends may differ, but tuning or changing spark plug make very slight difference in performance.
I ran my AD on same spark plugs for almost 7 years/ 80000 km.
And u won't believe it, when I changed those, I put in again the older ones (which were replaced earlier), because those were also in fine condition at the time of replacement. Had replaced them 7 years ago just on advice of some wise man. Felt hardly any difference after both replacements.

[pwuser157297521685]

Thanks. I'll clean it. I have the same experience with plugs as yours.