My car's getting slower with age... - Toyota Nation Forum : Toyota Car and Truck Forums

Grayguy · 09-22-2005, 05:28 PM

Ok, when I first started driving my car 2 years ago, I at one point got the thing up to 120-125mph. Now, after 2 years and 30K miles, it seems to struggle breaking the 100mph mark. I don't drive much over 75 more than a few times a year, so it doesn't matter too much, but still I'd like to fix it. I'm kinda thinking that it probably needs new plugs and wires and all that good stuff (they are 10 years old after all) but what else could it be?

CX889 · 09-22-2005, 06:40 PM

Do u change engine oil on a fairly basis?

amerikim · 09-22-2005, 06:47 PM

airfilter, plugs, cleaning out the injectors (seafoam etc).
Also tire pressure, you would be surprised about how much power you would lose if all your tires were running 5 psi low...

camry300 · 09-22-2005, 06:52 PM

plugged exhaust and aging O2 sensor.

CamryRacer · 09-22-2005, 07:51 PM

My 94 is doing that too when it was new it was easy to get it up to 130 but now (before mods) it was hard to get it to 110 but i dont realy know how to fix it...

Quote:

plugged exhaust and aging 02 sensor.

dose that mean that if i replace my O2 sensor it will help?? i was told that it wouldnt do anything...

Grayguy · 09-22-2005, 07:52 PM

I change my oil every 3000miles, and I did the sea foam thing this spring. I guess I'll have to get new plugs this weekend, and I'm hoping to get around to making my SRI too, so we'll see if that takes care of it...I'll check tires again just for good measure

camry300 · 09-22-2005, 10:36 PM

plugs, air filter , pcv valve , cap and rotor and a converter. plugged converter will rub your high rev power.

***Eye8Pussies*** · 09-23-2005, 12:01 AM

basically, do all maintenance possible and you should be able to get the car back up to speed

Quote:

Originally Posted by CamryRacer

My 94 is doing that too when it was new it was easy to get it up to 130 but now (before mods) it was hard to get it to 110 but i dont realy know how to fix it...dose that mean that if i replace my O2 sensor it will help?? i was told that it wouldnt do anything...

and it won't, unless there's somethere wrong with the sensor

camry300 · 09-23-2005, 09:41 AM

If your y pipe is leaking and your converter is partially clogged these will affect performance .
1. try to check if you have a leaky exhaust such as at the flanges near manifold and converter. you can take out the converter and replace it with a stright pipe to see if it makes any difference

2. buy a 15 dollar vaccum guage and hook it to the PCV vaccum line. and check for restricted exhaust