Engine issue

[jalen]

I'm looking at a 99 Solara with 90000 miles on it.

All are fine, the only problem I found is that when I take it to the highway and hit 80 MPH, no matter how hard I try to accelerate, the car just don't accelerate. I felt the car will never reach 100 MPH.

What can be the problem? Would it cost me a lot to get this issue fixed?

PS. I love this Solara but I am worried about its engine.

Thanks

[jalen]

To add more:

The engine check light is on when I test drive the car. And the dealer said it is a O2 sensor issue and he will replace that later.

Please comment

[Nyyankees3511]

Is it a v6? If its a 4 cylinder then yes it will be slow on the highway. I didnt think an 02 sensor would make the car to much slower than normal. I know a bad knock sensor makes your car very slow!

[jalen]

Thanks,

Yes, it is a V6 3.0L engine. I thought it should be a powerful machine and could easily goes to 100-120 MPH

So how much would it cost for replacing the knock sensor?

[kingkakyle]

well doesn't the check engine light restrict the power on the engine?
so whatever is causing the check engine light is causing the low power feeling

[Nyyankees3511]

It depends what causes the check engine light. I know the o2 wouldnt make the car that slow to cause the car not to reach 100. Knock sensors dont really go out on N/A cars but mine did and it felt so slow it wasnt funny.

[siennasc98]

To add more:

The engine check light is on when I test drive the car. And the dealer said it is a O2 sensor issue and he will replace that later.

Please comment

Did they tell you the OBDII error code? If it's P0325 or P0330 then it has a bad knock sensor(s). The sensors are about $150/each but very... very... very painfull to replace since they are underneath the intake assembly.

[jalen]

Thank you guys for the posts.

I haven't taken the car to inspection so right now don't know the code.

I will do that later and post result here.

[NeFaRiOuS_SLE]

Welcome to SolaraGuy. Hope it's all under dealer warranty somehow (unless you mean "I'm looking at" in a different way). It is a relatively fast car, but I do recommend taking it easy on public roads/freeways; I've hit 137 in my days, but I look back on it and think that it's not right and I rarely even let my car go above 90. If you do have the need for speed, go to a track.