4k redline?

[Fred]

Driving to work this morning and all of a sudden I go at the lights and when the tac gets to just before 4000 RPM the car starts bucking like it's not firing or a really bad shift and the check engine light comes on. So now any time i get near 4000rpm the car jerks so I am granny shifting all the way to work. When I got to the parkade I put it in neutral and revved it up to 6000rpm without any issues. Any idea wtf is going on?

[GTS4tw]

Originally posted by Fred
Driving to work this morning and all of a sudden I go at the lights and when the tac gets to just before 4000 RPM the car starts bucking like it's not firing or a really bad shift and the check engine light comes on. So now any time i get near 4000rpm the car jerks so I am granny shifting all the way to work. When I got to the parkade I put it in neutral and revved it up to 6000rpm without any issues. Any idea wtf is going on?

Wht kind of car is it?

[Fred]

2003 civic

[redline]

the ecu is in limp home mode....

either that or you have a major ignition problem

[stealth1313]

Is your vtec at 4k? Maybe the vtecs not wurking

[CMW403]

Yeah its in limp mode. Throw the codes and get whatever's wrong fixed and she'll go back into vtec mode baby. Its weird that it popped the CEL after this happened though. I'm pretty sure Its the CEL that puts the ecu in limp mode

[stealth1313]

Could also be a fuel pump/ injectors fail? If it's not sending enough fuel it will cut at a certain rpm

[Supa Dexta]

Did you fuel up any time just before then?

[davesparky6]

Plug leads?
Don't know if that car has individual coil packs or not.

[Fred]

what's my best way to figure out the CEL if it is in limp home mode?

[stealth1313]

Put the car in on position without the engine started and plug in a code reader

[YamahaV8]

Auto Value can scan your computer for free and give you the code that is causing your problem.

[Fred]

so turns out the cam shaft sensor is the problem. what's involved in fixing it?

[redline]

going to the dealer and getting a new one

[Fred]

well I got the car home and next time I took it out it was squeeling like crazy. Took a look under the hood and it was coming from either the A/C belt or the altenator. Removed the A/C belt and the squeel continued. Turns out the tention on the altenator belt was loose.