Car won't go pass 20-30 mph

[CG-loner]

After head gasket was replaced and everything was reinstall the car has a hard time moving.

It start, runs, and drive but won't go pass 20-30 mph.
It will shut off right away like something is wrong with the idle.

I thought it was the knock sensor since I broke it and replace it with a new one but still same thing happen.

Any idea guys?

 

[finch13]

You should have a CEL, if you don't get the codes scanned anyways. Report back.

 

[CG-loner]

You should have a CEL, if you don't get the codes scanned anyways. Report back.

so get it scan anyway even though engine light is not on?

 

[AccordFlex]

If you dont feel like paying the honda dealership to scan it for you, at least run up to advanced auto or something similar and use their scanner for free. If you find there is a code reading, I would take it to a honda mechanic to have fixed. Your problems sounds like it could be semi serious.

 

[HondaLuver83]

I wonder if you can lose compression from it not sealing all the way?

 

[CG-loner]

Okay, I got it scan it nothing happen!!
I clean whatever part you call it that have to do with intake/idle still doesn't work!!
I thought it was the timing belt so I took everything off and check it but still no good.
Car start and engine is running fine until you give it gas..

 

[f23accord2000]

sounds like limp mode vtec not kicking in this happend to my friend couldnt go past 40mph it ended up being the vtec sellanoid,it was kicking out and going into limp mode

 

[HondaLuver83]

sounds like limp mode vtec not kicking in this happend to my friend couldnt go past 40mph it ended up being the vtec sellanoid,it was kicking out and going into limp mode

Limp mode will cause a CEL tho.

To the OP, if you try to drive your car long enough. It might throw a code at ya, it just takes a little bit sometimes.


BTW, did you mess with your throttle body by chance? The throttle position sensor is very sensitive and you could have broken it or damaged during re-install of your head.

 

[jwong512]

Could it be the ECU?

 

[BlkCurrantKord]

Swap the TPS and MAP connectors and see what happens.