problems B200

[valdemaras]

i began to have some troubles with my 360 , 2.0l injection and don`t even know how to describe them correctly in english
but i`ll try:
al the mistery begans when the engine worms up, and when driving calm, lets say when driving in town about 55-60 km/h in 4th gear, and almost not pushing the gas pedal the rpm is about 2k the car began (i don`t know how exactly describe it) it begans to woble or to shake backwards and forwards, the feeling is like someone is sitting in back and and moving driver seat or something like that. and everything stops when i push the gas pedal a bit or put the clutch in, and everything is fine when engine is cold or when its warms when driving in lower gear and rpm is higher.
I hope yuol get the idea about the problem

[volvodspec]

i've helped a 360GLE owner with his car wich had the exact same symptoms.

i've completely run through all the setting options of the engine and that pretty much solved the problem and made it run even better than it used to.
there is a complete list of it in the dutch "vraagbaak" books; but i don't know if there is any specific like info in english..

at a start; you should try the usual "simple" way; do a full service for ignition parts and throw an injector cleaner in the fuel tank

if that doesn't solve it the vraagbaak describes an electrical check, and things like
- adjusting throttle body switch
- adjusting throttle body
- fuel pump capacity
and a few more that i can't remember 1,2,3..

[valdemaras]

i reacently checked the ignition system, as i changed the spurk plug i thouhgt that it coused problems but i put back the olds ones and nothing changed, checked the dizzy cap, cleand it, looks in good condition but i think it worth changing it, the spark leads looks in good condition and seems to be changed not long ago by previous owner. I`ll check all the throttle asembly.
And now thought about one thing, a few times i drow all the tank, it fully empty and even didn`t managed to get to the petrol station, so might it be that some dirt o something like that from the botom of tank get in to injection system? and would the injector cleaner help?

so i think i have some work for weekwnd i`ve printed out the engine servise manual and going to study it a bit

[volvodspec]

yeah especially in that case replacing the 2 fuel filters is worth a go!

the large one in the engine bay, and the smaller one under the car just before the fuel pump, after that; injection cleaner

[Hell Driver]

I've had similar sounding problems with my GLS, it's not fuel injection (B19 engine and carb) but I think I also might be getting blockages in the fuel system. I've not run out of petrol but when the tank gets low or just below half full it cuts out, just like it's out of petrol. It will restart eventually but you have to put more petrol in the tank to stop it happening again. Looks like I'll have to check the filter(s) too. I think there must be sediment in the tank.

[valdemaras]

well today put some injector cleaner, will see if something changes

[CBA]

Sounds like it could be pre-ignition caused by overheating in the head, or in the block (caused by carbon deposits in the engine or an airlock in the cooling system)

[jtbo]

Is there restriction part in vacuum pipe that goes to renix ignition unit? At least with carb version that makes lot of odd things.

[RobT_75]

I get the exact same thing with my 360, and coincidentally I was just about to post a topic about it. I used to get this in my old carbed 1.4 also, just a feathering of throttle in 4th and you get a mild kangaroo-ing effect which is quite annoying. It's only a problem at lower speeds. Will do the injector cleaner treatment as suggested and hopefully it'll be a smoother ride!

[Ride_on]

No such breather problems in 360 AFAIK, no restrictors as air is sucked only from before the carb. The 340 it is sucked after the carb and if the restriction is missing or the pipe is loose means air bypasses the carb which causes hunting.

You can pretty much remove the breather system in a 360 carb without any short term running problems.

Injections can have problems with loose pipes as they split and get older particularly for idle bypass.

You can get hesitation if the ignition system is leaky, but more noticeable when reving up or pulling off. Otherwise the injection system is pretty reliable, but I am less experienced at diagnosing faulty injectors etc.

[jtbo]

B200K Cisac carb has outlet for Renix that is right below throttle butterfly, after I installed restrictor (electric wire outer shell into vacuum tube that is locked to place with metal wire), my engine stop doing this, however with injection motor this is not probably the solution.

Faulty airflowmeter can make odd things like this too if it is flap type, can't say how it is with 360glt, but with bigger Volvos one could open it and find inside simple potentiometer which when worn causes spikes to signal, solution was to rotate potentiometer into bit different position, sometimes cleaning contact surfaces would help, but this applies only to flap type of airflowmeter.

[Ride_on]

Ah yes, actually I forgot about this, so what I said is wrong about the breather not affecting running. But there are no seperate restrictors, sounds like the vacuum sensor on the renix is leaking. I never found it made a big difference anyway.

In fact I remember a car that didn't run not right, it had a blocked small pipe going into the manifold or carb. Had caused the mixture and idle to be set incorrectly by the previous mechanic.

[valdemaras]

well got a new symptom, i think somehow the air gets in fuel lines and injection system, because ones i was driving and sudenly the car began to shake,like one or two cylenders weren`t working, i thougt the gas was nere empty, drew to a petrol station, put some gal in, but nothing changed, somehow managed to get to the home, stoped the engine and couldn`t start it again. Thought maybe the fuel pump was "caput"
so took the housing from fuel filter in engine bay, and when i unscrewed heard a sound of escaping compressed air, then cranked a starter for few seconds until i saw i fuel coming from filter, so the pump was OK, i put back the housing on filter and engine started without any problems.
so i didn`t pay attention to that air coming from filter, but now after something about a month it happened again(the engine was working badly, and after some time stopped and didn.` start again) so i take the housing again off the filter again the air escaped cranked starter the fuel apaired put the housing back again, engine starts and runs OK.
So i think the air gets in injection system, and thats why the engine in lower RPM makes that kangaroo effect, and when the tank is full or half full there almost no kangaroo effect, but when there is something about 15 liters or less the kangaroo begans, and when the lite starts to blink sometimes the engine start to shake and run erratic and few times even stops and don`t starts again.
So where the hell that air can find its way to fuel lines? Does anybody have any ideas?