My car takes extra long to accelerate over 2500rpms in every gear

Djcool1432008_192823
Tue, 11 Feb 2025 21:49:08 +0000
Maintenance/Repairs

Car:
1996 Honda Civic EX, d16y8 engine, manual transmission. Bone stock.

Problem:
When I am accelerating in any gear my car will take extra long to get over 2500 rpms, the higher the gear the longer it takes. But I have had it take longer in lower gears that in a higher one.

Background:
The first time I noticed the problem I was driving on the freeway and when I was accelerating I noticed my car wouldn’t go over 55mph. I didn’t think to look at the rpms so i thought it was something entirely different. (Pretty sure it was) A few days later my car engine dies going 35 on the street. I take it to a mechanic and he replaced the spark plugs for 500$? anyway I didn’t notice at first but my car would take absurdly long to get over 2500 rpms in gears 4 and 5. even when i floor it it takes up to 10 seconds. Before 2500 rpms it accelerates slower than a new car but not slow enough to get people honking and swerving around you. And after 2500 rpms when I get sick of it, its super fast, makes a high pitched whirring noise, but I think that’s the v-tec.
I looked everywhere for any car not just a Honda civic to see if they had the same problem. I couldn’t find anything even closely related.
Also the car probably also took long to get over 2500 rpms before I took it to the mechanic but lately its really bad, I was a while ago I got the spark plugs to I’m not sure what could be wrong, and if there is a way to repair it.
The only mods I have seen on the car is the thing at the back of the exhaust is not there. I think it just makes the engine sound louder but correct me if I am wrong. It’s not open heads its just the large oval thing at the very end of the exhaust.

lmk if you need anymore info, probably check this later tonight and tmmr, thanks.

25 posts - 12 participants