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MAF vs Coils

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bluevang
 
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Default MAF vs Coils - 10-05-2005 , 11:59 AM






As I read through the posts on engine problems there seems to be a
common set of solutions. Change the MAF or the coils. Can someone
describe the symptoms caused by the malfunction of each?

Thanks

Dennis

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Al Moodie
 
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Default Re: MAF vs Coils - 10-05-2005 , 09:20 PM






On Wed, 05 Oct 2005 15:59:00 GMT, bluevang <bluevang (AT) hotmail (DOT) com>
wrote:

Quote:
As I read through the posts on engine problems there seems to be a
common set of solutions. Change the MAF or the coils. Can someone
describe the symptoms caused by the malfunction of each?

MAF will affect all cylinders equally. Usual symptoms are an inability
to rev above a certain limit (3000rpm or whatever).
Possible solution: Check for grounding fault or corroded connectors.

Coils usually fail individually. When one coil fails you will get
uneven running. The engine will run on only 5 cylinders, in a rough
manner.
Find faulty coil by disconnecting the spark to each cylinder in turn.
The cylinder which produces no change in the way the engine runs is
the one with the faulty coil.

Al Moodie.


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bluevang
 
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Default Re: MAF vs Coils - 10-06-2005 , 11:48 PM



Al Moodie wrote:
Quote:
On Wed, 05 Oct 2005 15:59:00 GMT, bluevang <bluevang (AT) hotmail (DOT) com
wrote:


As I read through the posts on engine problems there seems to be a
common set of solutions. Change the MAF or the coils. Can someone
describe the symptoms caused by the malfunction of each?



MAF will affect all cylinders equally. Usual symptoms are an inability
to rev above a certain limit (3000rpm or whatever).
Possible solution: Check for grounding fault or corroded connectors.

Coils usually fail individually. When one coil fails you will get
uneven running. The engine will run on only 5 cylinders, in a rough
manner.
Find faulty coil by disconnecting the spark to each cylinder in turn.
The cylinder which produces no change in the way the engine runs is
the one with the faulty coil.

Al Moodie.
Thanks for the description. I have order an new MAF from Courtesyparts.

Thanks

Dennis


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Bitsbucket
 
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Default Re: MAF vs Coils - 10-12-2005 , 04:45 PM



If you remember the old days, or have access to an older car with regular
spark plug wires, remove one wire from one plug, this will reproduce the
coil problem, it is very obvious when you are not running on all cylinders.
Remember the saying "he isn't running on all 8 cylinders" well you can tell
when you have a problem like that, it is pretty obvious.....
Good Luck.
Bitsbucket
"Al Moodie" <nospam (AT) nospam (DOT) com> wrote

Quote:
On Wed, 05 Oct 2005 15:59:00 GMT, bluevang <bluevang (AT) hotmail (DOT) com
wrote:

As I read through the posts on engine problems there seems to be a
common set of solutions. Change the MAF or the coils. Can someone
describe the symptoms caused by the malfunction of each?


MAF will affect all cylinders equally. Usual symptoms are an inability
to rev above a certain limit (3000rpm or whatever).
Possible solution: Check for grounding fault or corroded connectors.

Coils usually fail individually. When one coil fails you will get
uneven running. The engine will run on only 5 cylinders, in a rough
manner.
Find faulty coil by disconnecting the spark to each cylinder in turn.
The cylinder which produces no change in the way the engine runs is
the one with the faulty coil.

Al Moodie.



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