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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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on CO cars, it's below the ECU/PCM
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and you said, Sensors, as Plural. got 2?
you failed to post where car is and where it was sold new.
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rich,101
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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.
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1 Answer

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


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  • 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.

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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

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