leistungsprobleme

[Blut_VTEC]

Hi,

 

Mein Deutsch ist nicht super , so wird der folgende Text hier auf Englisch.

 

I have a 2003 Accord Type S which has a significant power los in the mid rev range (4000-6000)

I own a couple of these Accords and I know this is not right.

low rev and VTEC work good , so does the idling. engine runs very smooth

In the first 2 gears its driveable but in 4th gear around 5000 rpm , you can get give full throttle but it's not going. When u shift up and get around 3000 rpm you get accelarate to 5000 again and then it won't climb anymore.

 

I didn't had any error codes beside a ABS error.

I've did a compression check, all 180 psi, so that's good

oil is good.

changed the sparkplugs and coilpacks.

changed the airfilter.

opened the ECU, no damage.

 

Any suggestions ? I thought maybe a clogged up catalytic converter but then again, after 6000 it's accelarates fine again

[Blut_VTEC]

niemand ?

[MadMike1983]

niemand ?

 

Hi Blut_VTEC,

 

Sorry to hear about your problem, unfortunately I also have a similar issue but it happens in lower revs. Do you notice any powerloss in 5th gear for example? I know that 5th is for economy but even so the car should have some acceleration. If you don't have any errors or CEL it might be a failing sensor that doesn't throw an error. The O2 sensor could also be a culprit here but without a decent mechanic taking a look it's hard to say. There might even be a vacuum leak somewhere.

 

Does your engine sound different ever since the issue appeared? Is there any smoke? Are there other noticeable differences since the issue appeared?

[ユーロR]

Try to swap around some sensors of the engine management with your other Accords.

Start with cam/crank angle sensor as your problem depends on rpm.

 

If this doesen't help, check for vacuum leaks and check your catalytic converter.

[Blut_VTEC]

Hi Blut_VTEC,

 

Sorry to hear about your problem, unfortunately I also have a similar issue but it happens in lower revs. Do you notice any powerloss in 5th gear for example? I know that 5th is for economy but even so the car should have some acceleration. If you don't have any errors or CEL it might be a failing sensor that doesn't throw an error. The O2 sensor could also be a culprit here but without a decent mechanic taking a look it's hard to say. There might even be a vacuum leak somewhere.

 

Does your engine sound different ever since the issue appeared? Is there any smoke? Are there other noticeable differences since the issue appeared?

 

It pulls in every gear, even 6th. But not in the 4500 to 6000 rev range.

I bought this car like this.

I had a couple of Cl9 before with a Lambda or LAF sensor error and even then they are driving

like they should

 

 

Try to swap around some sensors of the engine management with your other Accords.

Start with cam/crank angle sensor as your problem depends on rpm.

 

If this doesen't help, check for vacuum leaks and check your catalytic converter.

 

 

I think if the Cam/crank angle sensor was the problem the car would also be rough on idling and

the problem would occur in every rev range right ?

 

I've checked for vacuum leaks, found none.

 

I thought about the catalytic converter as well but then it would be also holding back in higher

rev ranges. And that's to the case.

[ユーロR]

I had the weirdest problems with crank/cam angle sensors on a few different cars. Always thought before it has to be something else.

[Heinz Wäscher]

niemand ?

ebay.co.uk ???

[Blut_VTEC]

I had the weirdest problems with crank/cam angle sensors on a few different cars. Always thought before it has to be something else.

 

#6 and 7 in the link ?

http://www.lingshondaparts.com/honda_car_parts_selection_pfk.php?block_01=17SEA01&block_02=E__1000&block_03=2771&block_05=hcr

 

I would expect an fault code then..

 

 

Maybe I can clean the filterscreens from the VTC as well:

#5 and #11

http://www.lingshondaparts.com/honda_car_parts_selection_pfk.php?block_01=17SEA01&block_02=E__1010&block_03=2771&block_05=hcr

[Mounty]

Have you cleaned your throttle body?? Does this only happen during "Hard acceleration"?? Explain a little further to us: Does the car stutter and shake, or does it not accelerate smoothly?

4500-6000 rpm is the 'problem zone'?? this is near/just above where vtec kicks in, but vtec does work, correct? Your idea with cleaning the screen sounds logical, try that, perhaps change or clean your vtec valve too. Are you using Hondata (or any other ecu programmer/datalogger), that you could record a datalog, and perhaps we could "see" where the car is failing, what your sensors are doing...??

 

Mounty

Bearbeitet 23. November 2016 von Mounty

[Blut_VTEC]

Have you cleaned your throttle body?? Does this only happen during "Hard acceleration"?? Explain a little further to us: Does the car stutter and shake, or does it not accelerate smoothly?

4500-6000 rpm is the 'problem zone'?? this is near/just above where vtec kicks in, but vtec does work, correct? Your idea with cleaning the screen sounds logical, try that, perhaps change or clean your vtec valve too. Are you using Hondata (or any other ecu programmer/datalogger), that you could record a datalog, and perhaps we could "see" where the car is failing, what your sensors are doing...??

 

Mounty

 

I haven't cleaned the throttlebody , the car doesn't shake or stutter , it runs very smoothly.

4500-6000 rpm is the problem zone. Under and above its good.

VTEC works at 6000 like it should.

I'm not using Hondata, so I can't see live data.

 

This week I'm going to clean the VTC strainer and the VTC spool valve .

And also change the crank sensor from another K24a3 I have laying around here.

I'll post my findings here

Also check if the timing hasn't slipped and check the valve clearance.

[Blut_VTEC]

cleaned the VTC strainer and the VTC spool valve .

And also change the crank sensor and tdc sensor from another K24a3 I have laying around here.

Didn't made a difference X(

Tomorrow I'll check if the timing of the chain is correct and check the valve clearance.

[Akula1651061329]

Sind den deine Nockenwellen ok?

[Blut_VTEC]

ja sind OK

[Ilja995]

you need a datalog. Honda dealers are able to do this. Or you ask TeamVTEC (ECU tuner), they are in Dortmund, Berlin and Stuttgart. They use also the original Honda Diagnostic System for datalog