Volvo 480 Club Europe

OK... It was a ignition cable... When the throttle cable was pulled, it touched the ignition wire from the coil to the distributor and there goes the ignition spark as well :lol: I wondered why there was some gnistering sound behind the dashboard :lol: I now know because I touched this mess and got ...

I'll try...

The MAF is the mass air flow-meter directly behind the air filter...

It's a black thing with a cable

you have to remove that cable when the motor is off

then measure resistance (ohms) between the two outer pins of the cable connector

should be between 300 and 550 Ohms...

whats the maf resistance reading measured between pins 1 and six without the connector attached?

Did you check the injectors?

And what's about the MAF, is it set correctly??

Hey you, after my MAF is allright now and the car is driving much better, I experience another prob: When I fully pull the throttle the car stutters. I suppose it's the throttle pot, giving false readings in full throttle position. It only appears when really fastly moving the gas pedal down (then I...

Hey there...

I think it was LiquiMoli or something... I have to look at the shelf in the shop again

It WAS LM Valve cleaning fluid....

Greetz,
Öse...

OK, here are my ongoings on this topic again....

Had a valve-cleaning additive put into the fuel... Now my MAF works as it should at ~400 Ohms

first and last is correct...

You should not put it into the cable, but test at the MAF's connectors itself...

BTW, I had again to move up a few ohms... Now at 510 ohms

Okay, for everyone who want's to try this way of CO-setting, I must say it's only suitable to do a coarse tune, unless you (or someone who tells you) know(s) what you do... For me, my LED blinks all the way from about 440 Ohms to 585 Ohms, so that's really a wide range. This is dependent on engine t...

Could be the starter motor... If it's the same as with mine, this will happen more often with time and then one day it's really gone.. You mean a weird sound like"aaahaaahaaaaaaaaah" by struggling for starting? And the motor doesn't turn or only slowly? Then I would think starter as well.... I think...

OK, we don't mean the wire to the lambda-sensor itself... We mean a connector for a LED-Diode with which you can adjust/check the CO... @ amonra: a simple check if it's the right cable (or at least the one I think it's the right one, blacvk-blue and with response to mixture settings and the "female"...

Yes, I don't understand either...

Perhaps it's because if the lambda-sensor detects a mixture too lean it triggers the injection ports to richen the mixture??

But, on the other hand, a hot engine seems to indicate a lean mixture??

crazy...

mmh weird... I did check with a LED a few minutes ago, same behavior as with the meter, need 585 Ohms to get the right mixture. LED was definitely blinking :wink: Perhaps you use a resistor with a resistance somewhat too high? I use a 560 Ohms resistor for a normal LED. Does your LED light up if con...

I'll try adjusting with a LED instead of a meter tomorrow, will fit the original Volvo Sparkplugs before... I'll post my results here...

Amonra, did you already try again??

Yours,

Oese..

The red(plus) of the battery is the minus for the led. If you connect a meter, red pole to the red of the battery and black to the connector we're speaking about, it shows -13.8V and -900mV as on/off... the connector is of positive potential relative to the plus of the battery... So the plus of the ...

As far as I know, 382 Ohms is only the starting point for CO adjustance and most often too lean. Of course, the mileage is ok then, but I would like to have it running the way it's meant to do... at least at my motor, there is a connector, which provides an on-off signal when the mixture is set corr...

OK, wanted to post my ongoings again... Had a leak before the turbo so the maf didn't know of all the air which was getting into the engine, I think thats why the ohms-setting had to be that high . Now, I get about 500-600Ohms depending on how hot the engine is at the time of setting the maf-resista...