hmm let me see, my volvo ran fine, till i put in tank 95 benzin, before i used 100. At first, the car started to stall in low rpms, and i heard a bang in exhaust (missfire). I checked all, replaced sparks, replaced spark plugs, air filter, idle valve and it isnt any good.

Now the car is hard to start, it missfires, it hasnt got that much power than before, the turbo is filling only 0,25 bar, before 0,5 bar.

When i use high rpms, like on 3rd gear with 3000 rpm, the car works great, if i reach 2000 rpm, car starts to "pull" and "jump" a little.

If i disconnect oxygen sensor, the car starts ok, it reaches 3500 rpm and it runs ok, till i add gas.


its a pain :( if anyone can help pls.

oh, today i tried to disconnect lamda sond from catalysator, no effect, so i reconnected it. If i use trouble codes, car gives me 1-1-1 no error.

strange.


car: 1993 440 turbo

i'll be intrested in what solutions some come up with as mine is about the same, she was jumping & pulling unless i was on a smooth flat run @ 2500-3000 rpms then last night she stalled on a junction & i cannot get her started, turns over fine plenty of fuel in the tank but non running into the carb!!!
fault code in 1 - 1 - 1 !!!!!!!!!i to changed all leads plugs & dizzy cab to solve the pulling???

please anyone, maybe some ideas?

still no one :( i tried everything, changed sparks, plugs, sensors, even replaced catalysator, oxygen sensors, every f..... sensor i found :D nothing...



pls

have you tried resetting the ECU, sometimes they can get themselves into limp home mode, then everything goes back to normal, but the darned thing is still in limp home mode.
Grendel

how do i reset ecu?

hmm, but in limp home mode, the car would get slow acc and speed, but mine is as fast as before, and over 2500 rpm it works fine

Ah but no, in fact I found apart from all the low end problems limp home mode was faster than normal mode (once you could get it going), on these early models anyway, A friend had an 850 that went into limp home and he drove from Kent to Dorset at 40Mph. (you have PM)
Grendel

maybe this will help: just now, i manage to start the car, if i add gas, it at least works, but after about 3 sec, you can hear "puff" in the engine side, dont know where, it seems like on exhaust manifold, than the rev ups to 3000, with always the same amount of gas as before at 1000, and then slowly stalls, till it "puffs" again.

if i disconnect air flow meter, the car runs smoothly at 3500 rpm, with no puffs.

thats strange.

oh yes, if i disconnect the hose from intercooler to throttle body, car works ok. if i put a hand on the hose and try to block it, it dies. it dies also if i put the hose back on.

even stranger.
I have a same one for my spare car, it works ok. i tried replacing air mass meter, but no changes.

should i try to change ecu?

oh yeah, i tried it, i can get 200 km/h with ease, same as before. only boost is little low, but no problem, it rises with revs. Car works great on high rpms, no problems at all. Problems are with starting it and crossroads.

GOsh, you are pretty much at the tried everything stage, Its probably an imbalance between sensors or something. low speed problems could be a blocked hose or vacuum pipe, or a leaking vacuum pipe, its worth checking all the pipes and hoses, maybe its one of the temperature sensors, the ECU adjusts to give a choke effect if the engine is cold.
I still have an error code on mine that tells me the speedo sensor is misreporting, yet I have a cable driven speedo!, so who knows.
Grendel

tried all the hoses, replaced them, no diffirence, replaced all sensors and cables, sparks everything!

could it be a gas vapour device, because one hose that comes out of manifold seems to be very hard to blow into, while on my working car i can blow with ease to that hose.


oh yeah, i have a custom turbo meter with vacuum meter, and it shows a little strange.

when the engine works its -0.8 bar (vacuum), when engine stalls it comes to 0 bar. if i add gas so the tubo kicks in just over 0.2 bar pressure, it works ok. i checked all hoses that connects this meter and no leakages.

oh yeah i forgot if i disconnect air mass meter, i get -0.6 bar

there is a very small restrictor in the air mass meter hose, this can get blocked, I went through 3 air mass meters before I found the blockage. the restrictor is at the injector end of the pipe on mine, but I dont have the turbo, it could also be a valve on the turbo maybe, I dont really understand these, so on that side of things you are out of my experience.
Grendel

mass meter hose is ok, it goes to turbo, the whole mass meter is working ok, tried it on other turbo.

damn, turbo is working ok, so there are no problems, must be some other f.... :D

could it be the ecu?

Could be, are the two ecu's the same, its useful to have a spare car for parts like this when testing, if it works fine with the other ECU, then that will be the cause, otherwise you got me stumped.
Grendel