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Author Topic: MAF Kh/g Readings  (Read 1508 times)

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Craig32

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MAF Kh/g Readings
« on: 10 January 2013, 21:58:04 »
Ok as per request the MAF readings:

Tick Over Warm: 9-10

Blip throttle light: 47

Heavy Blip: 79

at 2000: 26

at 3000: 69

15c Air Intake

o2's permanently lean

So what does this suggest?
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TheBoy

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Re: MAF Kh/g Readings
« Reply #1 on: 11 January 2013, 20:22:55 »
Quote from: Craig32 on 10 January 2013, 21:58:04
Ok as per request the MAF readings:

Tick Over Warm: 9-10

Blip throttle light: 47

Heavy Blip: 79

at 2000: 26

at 3000: 69

15c Air Intake

o2's permanently lean

So what does this suggest?
Both?

Also, what are trims doing?
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Craig32

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Re: MAF Kh/g Readings
« Reply #2 on: 11 January 2013, 21:54:11 »
Yep both sensors stay on lean even when blipping the throttle. (replaced the pre cat sensor in November last year.)  The fuel trim comes up as 0. I am worried its the cat.
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Kevin Wood

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Re: MAF Kh/g Readings
« Reply #3 on: 12 January 2013, 09:22:48 »
It won't be the cat as the sensors are before the cat. Not saying cat isn't faulty, but not under suspicion currently.

For some reason it's not going closed loop.

Can you see the coolant temperature? Does that rise quickly to a sensible value (80-100 degrees C)?

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Craig32

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Re: MAF Kh/g Readings
« Reply #4 on: 12 January 2013, 22:10:06 »
Hi Kevin, the engine takes a mile or to get warm its normally around 75-80. The heater warms up very quick (which is a blessing at the moment). It runs better with the MAF disconnected but far from perfect. What are your thoughts?
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tidla

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Re: MAF Kh/g Readings
« Reply #5 on: 12 January 2013, 22:13:04 »
The "on the dash" sensor is different to the ecu temp sender. Although the temp may go up, is the ecu seeing this rise?
The scanner reads what the ecu sees.
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TheBoy

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Re: MAF Kh/g Readings
« Reply #6 on: 13 January 2013, 09:51:32 »
Scanner should be able to confirm if its going closed loop or not
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Craig32

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Re: MAF Kh/g Readings
« Reply #7 on: 13 January 2013, 22:02:36 »
right I will see what the ECU temp say's tomorrow (weather pending). Where abouts is the ect sensor on the 2.2?
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Craig32

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Re: MAF Kh/g Readings
« Reply #8 on: 15 January 2013, 22:18:05 »
Right, I checked the ECU water temp today and it read the same as the temp gauge so I would assume its not the ECT sensor giving wrong readings. Runs about 75-80 unless in traffic. Any thoughts?
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tidla

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Re: MAF Kh/g Readings
« Reply #9 on: 15 January 2013, 22:47:09 »
going into closed loop?

has anyone mention checking for airs leaks?
« Last Edit: 15 January 2013, 22:52:40 by tidla »
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Craig32

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Re: MAF Kh/g Readings
« Reply #10 on: 17 January 2013, 22:05:08 »
Work done to date:

Plugs

coil pack

oil/filter/air filter

Throttle body clean and breathers cleaned (no leaks)

new lambda on the pre-cat

Runs better with MAF disconnected.

Any ideas?



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Entwood

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Re: MAF Kh/g Readings
« Reply #11 on: 17 January 2013, 22:07:31 »
Still not answered the question ...

Is it going to "closed loop" ???

:)
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Craig32

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Re: MAF Kh/g Readings
« Reply #12 on: 18 January 2013, 20:17:17 »
Sorry :o! it goes into open loop :)
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Entwood

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Re: MAF Kh/g Readings
« Reply #13 on: 18 January 2013, 20:20:34 »
Quote from: Craig32 on 18 January 2013, 20:17:17
Sorry :o! it goes into open loop :)

You mean it STAYS in "Open Loop" ??? it should start in "Open Loop" when cold then go to "Closed Loop" as it warms up.

If it stays in "Open Loop" it is probably NOT running efficiently at all as the fuel is not being continually adjusted by the ECU.
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Craig32

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Re: MAF Kh/g Readings
« Reply #14 on: 18 January 2013, 20:51:20 »
Yep it stays in open loop all the while and the fuel trim is 0.  :(
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