B230 in 360 problems

Post by **volvo300** » 23 Jul 2005 01:09 pm

Hi.
I have installed a B230 in my 360 GLT.
I has a A-cam, a 530 head, Bosch LE-jetronic and Bosch 229ml/min injectors.
I started right away and runs great..... until it goes 70 mph and more.
Over 70 mph it starts to pull erratically and it behaves like it can't "breath" normally.
What can be wrong?
I can accallerate with WOT and the engine pulls strong but over 70 mph it pulls like Sh.t.
It has the std. exhaust system which is about 2".

What can be wrong??

Reagrds.
Peter
Denmark

Post by **RandomHero** » 23 Jul 2005 03:07 pm

When it still has the exhaust from the B200 and the B230 needs bigger type that could be a problem at higher revs. The engine can't breath trough well. It has problems getting rid of the exhaust gases.

Post by **volvo300** » 23 Jul 2005 07:50 pm

Hi again.
Thanks "RandomHero" for the quick response.
I have found out, that the erratic pulling comes when I drive over 70 mph and slightly let go on the throttle.
If I maintain a low vacuum in the inlet manifold (ie. throttle plate half open or more), then it is almost gone, but if the vacuum gets higher (ie. throttle plate closing) then the problem comes again.

It could be the exhaust system that is the problem, but I am open for all response on this topic.

Thanks you all for your answers.

regards.
Peter

Post by **5lab** » 23 Jul 2005 08:08 pm

could be a leak between the cylinder top and the injector jets.

Post by **bodejodel** » 23 Jul 2005 10:44 pm

volvo300 wrote:Over 70 mph it starts to pull erratically and it behaves like it can't "breath" normally.

Is this in all gears at 70 mph or just in one gear?
It should happen in all gears at the same RPM if the exhaust is to blame...

Post by **volvo300** » 24 Jul 2005 10:26 am

Hi again.
I have installed new injector seals.
I have gone over 70 mph in 4th gear and 5th gear and the erratically pulling comes.
If I am to renew my exhaust system, wehere can I find a 2,5" or a 3" exhaust system to my 360 GLT saloon? And what is the price?

Thanks all for your replys.

regards.
Peter

Post by **bodejodel** » 24 Jul 2005 11:23 am

So it is allways at 70 MPH independant of RPM? that's strange...

If you want a bigger exhaust, you will have to find a company to have one custom built, which is expensive. If you have one made, you'd better use stainless steel otherwise you will have to have one made every 3 years.

Post by **jtbo** » 24 Jul 2005 11:47 am

This does not sound engine problem to me, wheels, driveshafts, anything that rotates same speed as wheels.

Post by **bodejodel** » 24 Jul 2005 11:51 am

Indeed, that's what I was thinking aswel... The wrong behaviour should happen at any speed when a certain RPM is hit, not only at 70MPH if the exhaust is to blame...

Post by **volvo300** » 24 Jul 2005 01:06 pm

Hi again.
Does some of you think that it can be a question of fueling??
I have installed some Bosch 229ml/min injectors, but I don't know if that is enough!

Regards.
Peter

Post by **redline** » 24 Jul 2005 01:09 pm

it sounds like it could either be fueling i.e. not enough fuel / air getting in so strangling it of power ,or the exhaust ,choking coz burnt gasses arent getting out quickly enough

Post by **bodejodel** » 24 Jul 2005 01:12 pm

Does it happen when you reach the same rpm in 2nd and 3rd aswell?

Post by **RandomHero** » 24 Jul 2005 01:57 pm

I think you should try to find out exactly at which speed, in which gears, and at which RPM it happens. Only that way you find out if it has something to do with the engine.

I stay with Mick's idea about the exhaust too. My car has a wrong mid exhaust pipe on it. It is one from a 1.7 litre. I'm about to chance that, but someone said to me that i could lose power at higher revs. So far it travels nicely at 130-140 km/h, but when i go faster i'll probably get the same thing that the exhaust can't get rid of its gasses.

Post by **volvo300** » 24 Jul 2005 04:29 pm

Hello again.
I was out driving and I hooked up my WB O2 sensor (LC-1 from Innovative) and I cpuld see on the readings, that when it started to pull erratically, the AFR goes lean in relation to the bad pulling.
I can see on my ECONmeter in the dashboard, that the pulling becomes bad when the inlet manifold pressure is in the low end of the scale.
This leads me to believe that the problem could be the AFM (Air Flow Meter).
Could it be that there is some pulsating air in the inlet manifold that could mess with the air flap in the AFM??
I have also found out, that the erratically pulling is also a problem at lower speeds than 50 mph, but only with the inlet manifold pressure in the low end of the scale. If I press the pedal a little down, so the pressure in the inlet manifold becomes higher, then the problem seems to go away.

Hope someone can help

I would like to thank all for their replys. This is the greatest site of all

Regards.
Peter

Post by **jtbo** » 24 Jul 2005 08:47 pm

If your air/fuel ratio is ok at high rpm and gas pedal down, then injectors are ok.

Have you tested adjusting mixture screw a bit? If not make sure you mark position before adjusting so you can return to original setting.

B230 in 360 problems

B230 in 360 problems

Re: B230 in 360 problems