A Problem + Video

[beeza]

Video (http://s99.photobucket.com/albums/l287/beeza2/?action=view&current=IMGP2221.flv)

In the Video I am stopped and all I'm doing is putting my foot on the accelerator and holding it still.You can see how the revs are bouncing up and down.

At idle it is fine.When driving it feels like the car is surging/hesitating.

Anyone had this problem? Know's what it is??? plz.

[denrie]

do u have petrol?

could also be ur cat convertor

[denrie]

how fast can u go?

[beeza]

Yes I have petrol,it's a new hi-flow cat.

It can still go to the speed limit etc.No problem there.

[beeza]

I will be swapping the TB,leads and dizzy soon.I've check most other things...

So it's the above + petrol pump that I'm thinking to try next.


I really wanted to see,with the video,if anyone has had this before.

It's like a missfire.

[vinnY]

hows your petrol filter?
timing belt not skipped a tooth?

my sisters eg had the same problem before, you could hear it when when the revs dippped a bit. sounded like a mini explosion when it did, turned out it had skipped a tooth on the timing belt afaik

[Xaber]

had a similar prob before but in a different car, changed the fuel filter, pump and then throttle body and it solved the prob.

[beeza]

Hmmmm.Thanks Vinny.

I've changed the fuel filter twice so it's not that.

My mechanic and his helper double checked the timing and said it was right but a second opinion would be good.That was only 2 weeks ago.90% confident in him :)

I will try a 02 sensor on wednesday.Still the stock one 100,000km's.

[beeza]

had a similar prob before but in a different car, changed the fuel filter, pump and then throttle body and it solved the prob.

I do really think it's the TB.I've changed all sensor's but it may be something internal.Like the FITV and tps run through the TB,where you can't get to.It may be stuffed in there.

One thing is for sure.I am learning heaps by hunting this problem :) must stay patient must stay patient must stay patient :)

[VTec1987]

100% is not the tb, i replaced mine with a new tb and still the same.

I have the same thing but it seems to be gone now after i changed the plugs.
But i really think that it could be the o2 sensor.

Your car blows out black smoke at high rpm?

[beeza]

Thanks Vtec.I will change the 02 sensor on wednesday.

Since I last mucked around with the TB it has gotten a bit worse,which leads me to thinking it's that.

If the 02 sensor dosen't fix it then I will swap first the leads then TB.If still no go then the fuel pump.If STILL no go I will smash the engine with a BIG hammer! :)

[Alexx]

Prehaps the injectors are fouled?

Get a proper clean done by an injector servicer. They take the injectors out and clean them properley. That additive shit you put in the petrol tank doesnt really work.

[beeza]

Thanks Alexx,I have had the injectors taken out and cleaned/adjusted.

What additive is that? I once put in half a bottle of octane booster when I went to the 1/4.It didn't do anything.

[Alexx]

Yea there are 'fuel injector cleaner' additives you can put in the petrol tank which you can buy from supercheap/repco etc. Brands like nulon and the like. Prehaps if you use it periodically from when the car is new they may work, but using it on your 100k+ dirty injectors wont do jack imo

Are you using 98 fuel? Try it and see what happens

[beeza]

Yeah always buy BP ultimate 98 octane.

It's not the leads,I tried that.

I'm getting another TB in 3 weeks.I think it's the TB.

[driftincivic]

my mate had the same problem turned out to be the thermostat

[beeza]

Thanks mate,after I do these things and no work,I'll remember that.

Thanks again!

[SuiJin]

figured this out yet cause i've got the same problem.

[TODA AU]

Though this is an older thread,
Without sound, the vid isn't worth much,
If it's what I think it is check the following.
1: Check / Set TPS sensor voltage - so you're not in over run fuel cut.
2: Check / Set ignition timing
3: Check O2 sensor output.

[beeza]

Thanks Adrian!!

Going to change 02 sensor right now!
I set the TPS voltage but I will replace the whole TB next week!
The timing has been check and set.

If no go,I'll get a vid with audio.I didn't realise this camera didn't have it.Need to borrow a mates.

Thanks heaps Adrain.Will update soon!

[beeza]

Much much better now with the new 02 sensor.It doesn't have this problem anymore! no more hesitating/surging,much smoother gear changes.Occasionally the idle is erratic.I'm swapping in another Throttle body.I reckon that will fix that.

But the main problem was the 02 sensor.

[TODA AU]

Much much better now with the new 02 sensor.It doesn't have this problem anymore! no more hesitating/surging,much smoother gear changes.Occasionally the idle is erratic.I'm swapping in another Throttle body.I reckon that will fix that.

But the main problem was the 02 sensor.

Great... Good to hear you got it sorted... :thumbsup:

With the slightly eratic idle,
Clean the IACV if you haven't already.
Warm the car up & disconnect the IACV,
Set the idle bleed bypass screw on the throttle so it idles correctly.
(NB: All electrical & accesory loads off)
Turn the car off & reconnect the IACV.
Check set ignition timing per workshop manual.

Hope that helps.
Cheers

Adrian

[beeza]

Thanks mate.It's been tooo long.... :)

The process above,that's to set the idle correctly Adrian?
If the timing is set correct now,will that process change that (timing)?

[TODA AU]

Thanks mate.It's been tooo long.... :)

The process above,that's to set the idle correctly Adrian?
If the timing is set correct now,will that process change that (timing)?

The above will get it pretty close with a stock ECU.
The TPS has to be correct for correct idle ignition.
But you've already done that.
If the timing has already been set after TPS setting, it should be right.
Give it a go anyway without cleaning the IACV 1st.
It shouldn't take you long...
Say 5mins once it's warm.
If it works, you're laughing. :thumbsup:

[beeza]

Excellent.Will do!

I cleaned out the IACV last week :)

Thanks Adrian!!