Re: Running Rich - 92-4.0L
 

> A dirty air filter?
>
Nope it's new
>
> Cheap ones first.
> - loose or broken vac line to the fuel pressure regulator?
> That results in too high a fuel pressure under normal operation.
> - Or too low a heat range on the plugs.
> If they are running cold they will soot up.
>
> Bad coil/weak spark that's not igniting each charge and letting some of
> the fuel through. leaking injectors (but usually that's only on one cyl).
> Clogged cat can result in backpressure problems.

Previous Owner cut a hole in the cat and clean out the guts. It does leak a
little, and I need to replace or bypass with a straight pipe
>
> Any fault codes?
> http://autorepair.about.com/library/...l-dtcs-24a.htm

No Codes


> Intake air temp sensor.
>
> Spdloader

Can these be tested with a meter?

Re: Running Rich - 92-4.0L
 

> A dirty air filter?
>
Nope it's new
>
> Cheap ones first.
> - loose or broken vac line to the fuel pressure regulator?
> That results in too high a fuel pressure under normal operation.
> - Or too low a heat range on the plugs.
> If they are running cold they will soot up.
>
> Bad coil/weak spark that's not igniting each charge and letting some of
> the fuel through. leaking injectors (but usually that's only on one cyl).
> Clogged cat can result in backpressure problems.

Previous Owner cut a hole in the cat and clean out the guts. It does leak a
little, and I need to replace or bypass with a straight pipe
>
> Any fault codes?
> http://autorepair.about.com/library/...l-dtcs-24a.htm

No Codes


> Intake air temp sensor.
>
> Spdloader

Can these be tested with a meter?

Re: Running Rich - 92-4.0L
 

> A dirty air filter?
>
Nope it's new
>
> Cheap ones first.
> - loose or broken vac line to the fuel pressure regulator?
> That results in too high a fuel pressure under normal operation.
> - Or too low a heat range on the plugs.
> If they are running cold they will soot up.
>
> Bad coil/weak spark that's not igniting each charge and letting some of
> the fuel through. leaking injectors (but usually that's only on one cyl).
> Clogged cat can result in backpressure problems.

Previous Owner cut a hole in the cat and clean out the guts. It does leak a
little, and I need to replace or bypass with a straight pipe
>
> Any fault codes?
> http://autorepair.about.com/library/...l-dtcs-24a.htm

No Codes


> Intake air temp sensor.
>
> Spdloader

Can these be tested with a meter?

Re: Running Rich - 92-4.0L
 

Les wrote:

>> Intake air temp sensor.

> Can these be tested with a meter?

Yes. they are just temperature sensitive
resistors. (both mat and engine temp)
http://revbeergoggles.com/Fixes/diagnostics.html

--
DougW

Re: Running Rich - 92-4.0L
 

Les wrote:

>> Intake air temp sensor.

> Can these be tested with a meter?

Yes. they are just temperature sensitive
resistors. (both mat and engine temp)
http://revbeergoggles.com/Fixes/diagnostics.html

--
DougW

Re: Running Rich - 92-4.0L
 

Les wrote:

>> Intake air temp sensor.

> Can these be tested with a meter?

Yes. they are just temperature sensitive
resistors. (both mat and engine temp)
http://revbeergoggles.com/Fixes/diagnostics.html

--
DougW

Re: Running Rich - 92-4.0L
 

"Les" <nospam@nospam.com> wrote in message
news:C15E8262.B392%nospam@nospam.com...
>
>
>> A dirty air filter?
>>
> Nope it's new
>>
>> Cheap ones first.
>> - loose or broken vac line to the fuel pressure regulator?
>> That results in too high a fuel pressure under normal operation.
>> - Or too low a heat range on the plugs.
>> If they are running cold they will soot up.
>>
>> Bad coil/weak spark that's not igniting each charge and letting some of
>> the fuel through. leaking injectors (but usually that's only on one
>> cyl).
>> Clogged cat can result in backpressure problems.
>
> Previous Owner cut a hole in the cat and clean out the guts. It does leak
> a
> little, and I need to replace or bypass with a straight pipe
>>
>> Any fault codes?
>> http://autorepair.about.com/library/...l-dtcs-24a.htm
>
> No Codes
>
>
>> Intake air temp sensor.
>>
>> Spdloader
>
> Can these be tested with a meter?
>
>

When the sensor goes bad, it reports a cold condition that causes the system
to go "full rich". Doesn't log a code, the computer just stays in cold start
loop. Very common on GM 4.3 engines too.
I don't have the operational parameters for testing with a meter, but
someone here will.

Spdloader

Re: Running Rich - 92-4.0L
 

"Les" <nospam@nospam.com> wrote in message
news:C15E8262.B392%nospam@nospam.com...
>
>
>> A dirty air filter?
>>
> Nope it's new
>>
>> Cheap ones first.
>> - loose or broken vac line to the fuel pressure regulator?
>> That results in too high a fuel pressure under normal operation.
>> - Or too low a heat range on the plugs.
>> If they are running cold they will soot up.
>>
>> Bad coil/weak spark that's not igniting each charge and letting some of
>> the fuel through. leaking injectors (but usually that's only on one
>> cyl).
>> Clogged cat can result in backpressure problems.
>
> Previous Owner cut a hole in the cat and clean out the guts. It does leak
> a
> little, and I need to replace or bypass with a straight pipe
>>
>> Any fault codes?
>> http://autorepair.about.com/library/...l-dtcs-24a.htm
>
> No Codes
>
>
>> Intake air temp sensor.
>>
>> Spdloader
>
> Can these be tested with a meter?
>
>

When the sensor goes bad, it reports a cold condition that causes the system
to go "full rich". Doesn't log a code, the computer just stays in cold start
loop. Very common on GM 4.3 engines too.
I don't have the operational parameters for testing with a meter, but
someone here will.

Spdloader

Re: Running Rich - 92-4.0L
 

"Les" <nospam@nospam.com> wrote in message
news:C15E8262.B392%nospam@nospam.com...
>
>
>> A dirty air filter?
>>
> Nope it's new
>>
>> Cheap ones first.
>> - loose or broken vac line to the fuel pressure regulator?
>> That results in too high a fuel pressure under normal operation.
>> - Or too low a heat range on the plugs.
>> If they are running cold they will soot up.
>>
>> Bad coil/weak spark that's not igniting each charge and letting some of
>> the fuel through. leaking injectors (but usually that's only on one
>> cyl).
>> Clogged cat can result in backpressure problems.
>
> Previous Owner cut a hole in the cat and clean out the guts. It does leak
> a
> little, and I need to replace or bypass with a straight pipe
>>
>> Any fault codes?
>> http://autorepair.about.com/library/...l-dtcs-24a.htm
>
> No Codes
>
>
>> Intake air temp sensor.
>>
>> Spdloader
>
> Can these be tested with a meter?
>
>

When the sensor goes bad, it reports a cold condition that causes the system
to go "full rich". Doesn't log a code, the computer just stays in cold start
loop. Very common on GM 4.3 engines too.
I don't have the operational parameters for testing with a meter, but
someone here will.

Spdloader

Re: Running Rich - 92-4.0L
 

On 10/20/06 2:30 PM, in article Ts9_g.36203$iA5.20657@dukeread11, "DougW"
<post.replies@invalid.address> wrote:

> Les wrote:
>
>>> Intake air temp sensor.
>
>> Can these be tested with a meter?
>
> Yes. they are just temperature sensitive
> resistors. (both mat and engine temp)
> http://revbeergoggles.com/Fixes/diagnostics.html


Cool, but its time to talk dummy language...

How does that table convert to an Ohms reading? My gauge (old needle type)
read from 0 to 1K.

Great Web Site!