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We have volt riched to injetions but the car dosenot work

The said to me you have problem with ecu

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Not much details here. ECU is not the most likely candidate have you checked the basics - Spark plugs and ignition coils? While you have the spark plugs out what condition are they in is there alot of carbon build up (injectors blockage - over fueling), is there oil on the plugs - bore wear. How was the car running before it would not longer start - did it over heat - run low on oil?

Posted on Jan 17, 2013

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1 Answer

Are all mitsubishi 6d40 engine is controlled by ecm or i mean ecu?


its an fully mechanical injetion system , with electrical valve fuel feeders

Jun 13, 2017 | Mitsubishi Cars & Trucks

1 Answer

Why is the engine running erratically?


the map sensor fail means (DTC code not stated sadly)
mean the voltage is stuck at 5v or 0v.
near
the ECU never lies about this, ever.
the ECU enters FAILSAFE mode , in this case. (limphome)
and runs rich has heck , horrid rich, misfires.
RPM limited
idle controls disabled.
and retarded spark timing.

pretty much worst of the worst for EFI ops.
all you need to do is post the DTC error. and all that is what matters.
new MAP time, or fix the vacuum hose. its clogged? cracked.
make sure the vacuum leaves the intake manifold (sucks) and
makes it all the way to the MAP on the fire wall and that the
tiny filter(check valve?) inline is clogged, (blown through it)

This is a G16A ENGINE, With an ECU that does not create or control spark, (old style distributor with mech, and vac, advance)

DTC 31 or 32??????????????????????
http://www.fixkick.com/CEL/CEL.html#OBD1codes

if vacuum line is breached to map , the vacuum is not 0" HG
the MAP outputs 3.9V

the ECU trip points i do not know. but
above 3.9 or below .5v it will trip... somewhere,

here is very good map , graph

http://www.fixkick.com/sensors/my-map.html


all testing of it is here
http://www.fixkick.com/sensors/tests/MAP-testing.html

with photos and how to back probe it with an volt meter.

Apr 29, 2015 | 1990 Geo Tracker

1 Answer

94 ford mustang 3.8 engine why is no. 5 cylendre running too rich


How do you know #5 is running rich? error codes tell you that? I doubt it. But if you are sure, check the connections and the wire all the way back to the Ecu. my wild guess, the control is shorted to a positive supply and therefore the injector thinks it is supposed to supply wide open fuel. Or you have a bad ecu that is telling it the same thing.

Mar 21, 2015 | 1994 Ford Mustang

1 Answer

2004 2.0 lt. running very rich


on CO cars, it's below the ECU/PCM
but if you have lambda's, then its not a CO car.
CO cars are missing 02 sensors.
and you said, Sensors, as Plural. got 2?
you failed to post where car is and where it was sold new.
Or VIN.
Engine controls vary by country.
this car may be OEBD type ECU/PCM , "use a scan tool"
and if motor is rich , that can be for 2 reasons.
ENGine is rich
Catalysis dead, or both.
and CO is not HC.
but high CO usually does, give you high CO.

May 31, 2013 | 2004 Suzuki Grand Vitara

1 Answer

97 wrangler 2.5 running rich


rich,101
this is a MAP , speed density EFI fueling system,,,,
not misfiring.
in no order,
  1. map reads, low all the time cause rich, (low means low vacuum that is real) the ECU sees that and adds huge fueling.
  2. fuel pressure way too high bad PFR.
  3. injector leaking i do an injector leakdown test, or balance test, like the book shows. (and has 3 causes)
  4. front 02 sensors struck lean , forced ECU to go RICH. Any exhaust (its air sucking in) leaks, cause the 02 to go nuts or stick at 0v all the time. and RICH will happen. unplug it , get better?
we use simple tools to find this.
is vacuum at 19 inches HG at idle.? hot? sealevel #s/
???? clean the map yet?

Sep 08, 2012 | 1997 Jeep Wrangler

1 Answer

Fuel problems 97 jeep


check whether your temperature sensor is not working and as it is not doesn't send message to the ECU correctly and is sending that the engine is working cold start and the ECU allows the Injection system to spray rich fuel as it needs for cold start. Check this out

Aug 20, 2012 | Cars & Trucks

1 Answer

Hard to start running rich & stall


Sounds like a MAP inlet Manifold Absolute Pressure sensor fault. Symptoms of a faulty MAP


  • Poor starting/erratic idling/engine stall - with the MAP not sending the correct inlet air pressure signals to the ECU, incorrect fuel injection volumes then result. The imbalance in the fuel/air ratio often leads to rough engine performance and poor starting and stall. The engine might be kept running at start up by pumping the accelerator pedal
  • Sluggish performance/power ceiling - the engine may seem to perform normally in the lower rev range but will severely run out of power above about 3000 rpm
Poor fuel economy. The ECU tends to supply an over rich fuel mix to the engine in the absence of signal from the MAP resulting in very poor fuel economy. The reason for this is that if the MAP has no signal this ECU assumes 'no vacuum' = fully open throttle = engine is under load. To match this 'open throttle' signal the ECU increases the injection cycle to supply more fuel

How to Check? The MAP has three electrical pins, one for 12 volts (or 5 volts) reference, one for ground and the third (the middle one generally) is the 'signal' output. Put a voltmeter positive connector on the 'signal' pin of the connected socket (back probe by inserting a bit of wire). Apply suction to the vacuum input, even sucking on it with your mouth, should result in a measurable voltage output. At normal air pressure (open throttle) the voltage seen should be 0 volts. As vacuum is applied the voltage output should change to about 5 volts (throttle closed at idle). If no transition seen the MAP is faulty.

Feb 02, 2011 | Chrysler Sebring Cars & Trucks

1 Answer

V40 direct injection gdi . rich running & lumpy idle


replace lambda probe expensive but it will run ok after that, i dont know if you know how they work so here's a brief: lambda tells ecu how rich the exhaust gasses are, ecu ajusts fuel input as neccasery eg lambda says not anough fuel ecu puts more in and the other way round.
so if your lambda is covered in **** when you get it out just clean and put it back, if it looks clean enough it needs replacing!! jezza

Feb 09, 2010 | 2000 Volvo V40

2 Answers

Jaguar xj6 4.0 1990. showing fault code fuel 14, fail 14. what does this code mean ?


2 airflow sensor out of operating range 3 coolant temp sensor out of operating range 4 oxy sensor indicates full rich 5 throttle potentiometer/airflow sensor... (low throttle pot signal with high airflow sensor signal) 6 throttle pot/airflow sensor...... (high throttle pot signal with low airflow sensor signal) 7 throttle pot...idle fuel adjustment failure(idle speed??) 8 intake air temp sensor...open or shorted circuit to sensor 11 Throttle pot at idle: Throttle pot idle trim out of normal range 12 Airflow meter: MAF signal out of range 14 Coolant thermistor: Resistance out of range or static during engine warm up 16 Air thermistor: Resistance out of range 17 Throttle pot: Out of range 18 Throttle pot/Airflow: Low throttle pot signal at high airflow 19 Throttle pot/Airflow: High throttle pot signal at low airflow 22 Fuel pump drive: ECU output to fuel pump relay 23 Fuel supply: Engine running too rich 24 Ignition Drive: ECU output to ignition Amp 26 Air leak: Engine running too lean 29 ECU self check 33 Injector Drive: ECU output to injectors 34 Injector: Looks for Injector dribble 37 EGR Drive: ECU output to EGR switching valve 39 EGR check sensor: EGR not working (normally pipe blocked) 44 Lambda (O2) sensor: Poor mixture control rich or weak (or misfire) 46 Idle speed Control valve: ECU output to Coil AB 47 Idle speed Control valve: ECU output to Coil CD 48 Idle Speed Control Valve: Stepper motor grossly out of position 66 Air pump: ECU output to air pump relay 68 Road speed sensor: Seen speed < 5km/h at high engine airflow 69 Drive/Neutral switch: Seen cranking in "D" or high airflow in "N" 89 Purge Valve drive: ECU output to purge valve
this is all I could find

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1 Answer

Fed or Cali engine?


change o fix,the ecm,if the air flow dont work properly,and the enguine run rich,try another ecu.

Mar 13, 2009 | 1993 Suzuki Sidekick

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