116Hp D4D, Engine Load Constantly 100%, Possible Maf Fault?

[jkall]

Hello,

I have avensis stw 2004 with 1cd-ftv (2.0 d4d 116hp) and tested it with obdautodoctor pro for nokia symbian.

I have been having same problem as some people on older postings, calculated engine load is constantly 95...100%. Idling at 800rpm it is 99%, cold engine idling (1200rpm) is 95% and any kind of driving it is 100%.

Another strange values are intake air temperature (IAT), which is around 20 celcius while driving on highway and it is zero degrees outside. Mass air flow (MAF) readings are 6 g/s on 800RPM idling and no loading; 26 g/s 2400RPM and no loading; up to 140 g/s with wide open throttle acceleration. I think these reading are quite high and thought of buying new MAF sensor, does it makes any sense? I tried to clean the MAF sensor yesterday with CRC Air Sensor Clean but no any difference, the metal wires look still dirty and tarnished.

My engine works quite well, no error codes, but every once and while it lacks power and doesn't want to rev up. It's like there would be big clogging and nothing happens when pressing pedal. When i change to lower gears and finally got the rpm above ~2700rpm the car suddenly gives all the power it has. After a while it operates normally.

I have cleaned the EGR ~3000km ago and it was already quite clean.

Secondly, fuel consumption is quite high, almost 6L/100km on 90% highway (90 km/h) and 10% city. I think it should be near to 5L/100km in this kind of driving.

Third fault is that sometimes white smokes comes very much on idling and while accelerating. Sometimes no smoke coming at all. I have checked it's not engine coolant leak in cylinder head. Coolant level is stabile and on normal level. I think this white smoking is due to excessive fuel feed.

[szdombi]

Hi,

mine has the same engine, with commercial obd2 readers, reading 100% engine load is normal with 1cd-ftv,

think of engine load as pressure: 99% equals 99 kPascal = 0,99 bar (atmospheric pressure), when idling.

Full throttle, manifold absolute pressure goes up to 212 kPa with mine, engine load is still 100%. (max. 225 KPa or 2,25 bar)

Did you check the Battery voltage?

With running engine, it shound be around 14.1 V (generator charging)

When the engine is being started it should not go below 10V.

My car had similar symptoms before the Battery went dead.

The solenoid coil in the turbo pressure regulator valve which is regulated with PWM (pulse width modulation) by the ECU, was not working properly, did not close properly. Manifold absolute pressure did not go higher than 170 kPa.

With the new Battery, it was solved.

Maybe check this point. I hope to help.

Szabolcs

[Warrior1884]

Im having similar problems with excessive white smoke. I had a DTC code for the EGR valve, I cleaned this and now I have two DTC's one for the MAF sensor and the IAT.

The air filter and the fuel filer are really dirty, waiting on the parts arriving and have a new Battery to put in the car too. Hopefully it will run better after this. I have only had the car a month but was running generally well before I cleaned the EGR.

[fastbob72]

Im having similar problems with excessive white smoke. I had a DTC code for the EGR valve, I cleaned this and now I have two DTC's one for the MAF sensor and the IAT.

The air filter and the fuel filer are really dirty, waiting on the parts arriving and have a new battery to put in the car too. Hopefully it will run better after this. I have only had the car a month but was running generally well before I cleaned the EGR.

Have you tried just clearing the faults and seeing if they return.I have a 1ZZ-FE but have found that on removing or replacing my spark plugs it is liable to throw up a fault code/DTC for each plug the first time I start it afterwards. Not everytime but sometimes this happens but everytime I've disconnected the OCV it will throw up a fault code the after it's all reconnected and started the first time.

I can't say for sure on your engine but the 1ZZ has a combined MAF and IAT sensor and the same thing occurs, everytime they are unplugged the next time i start it, once reconnected, I get a fault code appear.

Each time this occurs I clear the fault code and it never comes back. The one time I removed the MAF to clean it it happened.

Sent from my SM-N910F using Tapatalk