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Old 06-14-2005, 01:11   #1 (permalink)
CJB
Guest
 
Posts: n/a
Bucking 351 FI

My 1990 1/2 ton Club Wagon has a 351 FI, E4OD and a 3.55LS.



More than half the time, but not all the time, at low RPM and light
throttle, I have a bad "miss." Honestly, it's more like bucking than
missing. It happens especially badly at around 45 with the tranny in 4th,
TC locked and just enough throttle to keep it rolling at the same speed.
Incidentally, it's not as bad when it's cold.



My estimation was that this was ignition related since that's the times
where I'm likely to have the most strain on the firing of the plugs.
However, I've replaced the plugs, wires, cap, and rotor and seen no real
change.



I pulled the codes and the only hard fault I have is a 44, which deals with
the air pump system. I haven't found out what the cause of that is, but I
wouldn't think that it would cause this. The van just passed the Northern
Virginia emissions inspection with flying colors, so I'm surprised that
there's a fault in a part of the emissions system.



I also had an old EGR related code that I only got from the KOEO test. I'm
more likely to think an EGR problem would cause the bucking I get.



Lastly, I tried to do a cylinder balance test, but couldn't get the thing to
go into the test after the KOER portion. I tried tapping the throttle, as
my scanner book suggested. I even tried a brief WOT.



Any help?


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Old 06-14-2005, 01:11   #2 (permalink)
CJB
Guest
 
Posts: n/a
Re: Bucking 351 FI

I'm shocked that I haven't received a single response.

What information can I add that will help?

CJB


"CJB" <colonyparkwagon@excite.nospam> wrote in message
news:9gpoe.3498$ld3.742@trnddc04...
> My 1990 1/2 ton Club Wagon has a 351 FI, E4OD and a 3.55LS.
>
>
>
> More than half the time, but not all the time, at low RPM and light
> throttle, I have a bad "miss." Honestly, it's more like bucking than
> missing. It happens especially badly at around 45 with the tranny in 4th,
> TC locked and just enough throttle to keep it rolling at the same speed.
> Incidentally, it's not as bad when it's cold.
>
>
>
> My estimation was that this was ignition related since that's the times
> where I'm likely to have the most strain on the firing of the plugs.
> However, I've replaced the plugs, wires, cap, and rotor and seen no real
> change.
>
>
>
> I pulled the codes and the only hard fault I have is a 44, which deals
> with the air pump system. I haven't found out what the cause of that is,
> but I wouldn't think that it would cause this. The van just passed the
> Northern Virginia emissions inspection with flying colors, so I'm
> surprised that there's a fault in a part of the emissions system.
>
>
>
> I also had an old EGR related code that I only got from the KOEO test.
> I'm more likely to think an EGR problem would cause the bucking I get.
>
>
>
> Lastly, I tried to do a cylinder balance test, but couldn't get the thing
> to go into the test after the KOER portion. I tried tapping the throttle,
> as my scanner book suggested. I even tried a brief WOT.
>
>
>
> Any help?
>
>



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Old 06-14-2005, 01:11   #3 (permalink)
SC Tom
Guest
 
Posts: n/a
Re: Bucking 351 FI

Possibly a fuel filter problem? Had the same symptoms with a '64 Fury and
that's what it turned out to be. Only 26 years older than your Club Wagon,
LOL.
SC Tom

"CJB" <colonyparkwagon@excite.nospam> wrote in message
news:XB_oe.7704$nr3.7256@trnddc02...
> I'm shocked that I haven't received a single response.
>
> What information can I add that will help?
>
> CJB
>
>
> "CJB" <colonyparkwagon@excite.nospam> wrote in message
> news:9gpoe.3498$ld3.742@trnddc04...
>> My 1990 1/2 ton Club Wagon has a 351 FI, E4OD and a 3.55LS.
>>
>>
>>
>> More than half the time, but not all the time, at low RPM and light
>> throttle, I have a bad "miss." Honestly, it's more like bucking than
>> missing. It happens especially badly at around 45 with the tranny in
>> 4th, TC locked and just enough throttle to keep it rolling at the same
>> speed. Incidentally, it's not as bad when it's cold.
>>
>>
>>
>> My estimation was that this was ignition related since that's the times
>> where I'm likely to have the most strain on the firing of the plugs.
>> However, I've replaced the plugs, wires, cap, and rotor and seen no real
>> change.
>>
>>
>>
>> I pulled the codes and the only hard fault I have is a 44, which deals
>> with the air pump system. I haven't found out what the cause of that is,
>> but I wouldn't think that it would cause this. The van just passed the
>> Northern Virginia emissions inspection with flying colors, so I'm
>> surprised that there's a fault in a part of the emissions system.
>>
>>
>>
>> I also had an old EGR related code that I only got from the KOEO test.
>> I'm more likely to think an EGR problem would cause the bucking I get.
>>
>>
>>
>> Lastly, I tried to do a cylinder balance test, but couldn't get the thing
>> to go into the test after the KOER portion. I tried tapping the
>> throttle, as my scanner book suggested. I even tried a brief WOT.
>>
>>
>>
>> Any help?
>>
>>

>
>



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Old 06-14-2005, 01:11   #4 (permalink)
CJB
Guest
 
Posts: n/a
Re: Bucking 351 FI

I thought about that too, so I replaced the inline filter. I also doubt
it's a screen in one of the tanks because the engine does the same thing
with either tank.

Is there another filter I don't know about?

CJB


"SC Tom" <SC@Tom.com> wrote in message news:uN2pe.5676$rt3.1065@fe03.lga...
> Possibly a fuel filter problem? Had the same symptoms with a '64 Fury and
> that's what it turned out to be. Only 26 years older than your Club Wagon,
> LOL.
> SC Tom
>
> "CJB" <colonyparkwagon@excite.nospam> wrote in message
> news:XB_oe.7704$nr3.7256@trnddc02...
>> I'm shocked that I haven't received a single response.
>>
>> What information can I add that will help?
>>
>> CJB
>>
>>
>> "CJB" <colonyparkwagon@excite.nospam> wrote in message
>> news:9gpoe.3498$ld3.742@trnddc04...
>>> My 1990 1/2 ton Club Wagon has a 351 FI, E4OD and a 3.55LS.
>>>
>>>
>>>
>>> More than half the time, but not all the time, at low RPM and light
>>> throttle, I have a bad "miss." Honestly, it's more like bucking than
>>> missing. It happens especially badly at around 45 with the tranny in
>>> 4th, TC locked and just enough throttle to keep it rolling at the same
>>> speed. Incidentally, it's not as bad when it's cold.
>>>
>>>
>>>
>>> My estimation was that this was ignition related since that's the times
>>> where I'm likely to have the most strain on the firing of the plugs.
>>> However, I've replaced the plugs, wires, cap, and rotor and seen no real
>>> change.
>>>
>>>
>>>
>>> I pulled the codes and the only hard fault I have is a 44, which deals
>>> with the air pump system. I haven't found out what the cause of that
>>> is, but I wouldn't think that it would cause this. The van just passed
>>> the Northern Virginia emissions inspection with flying colors, so I'm
>>> surprised that there's a fault in a part of the emissions system.
>>>
>>>
>>>
>>> I also had an old EGR related code that I only got from the KOEO test.
>>> I'm more likely to think an EGR problem would cause the bucking I get.
>>>
>>>
>>>
>>> Lastly, I tried to do a cylinder balance test, but couldn't get the
>>> thing to go into the test after the KOER portion. I tried tapping the
>>> throttle, as my scanner book suggested. I even tried a brief WOT.
>>>
>>>
>>>
>>> Any help?
>>>
>>>

>>
>>

>
>



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Old 06-14-2005, 01:11   #5 (permalink)
SC Tom
Guest
 
Posts: n/a
Re: Bucking 351 FI

Not that I'm aware of, sorry.
Good luck with it.
SC Tom

"CJB" <colonyparkwagon@excite.nospam> wrote in message
news:tQ3pe.12922$U_2.2716@trnddc06...
>I thought about that too, so I replaced the inline filter. I also doubt
>it's a screen in one of the tanks because the engine does the same thing
>with either tank.
>
> Is there another filter I don't know about?
>
> CJB
>
>
> "SC Tom" <SC@Tom.com> wrote in message
> news:uN2pe.5676$rt3.1065@fe03.lga...
>> Possibly a fuel filter problem? Had the same symptoms with a '64 Fury and
>> that's what it turned out to be. Only 26 years older than your Club
>> Wagon, LOL.
>> SC Tom
>>
>> "CJB" <colonyparkwagon@excite.nospam> wrote in message
>> news:XB_oe.7704$nr3.7256@trnddc02...
>>> I'm shocked that I haven't received a single response.
>>>
>>> What information can I add that will help?
>>>
>>> CJB
>>>
>>>
>>> "CJB" <colonyparkwagon@excite.nospam> wrote in message
>>> news:9gpoe.3498$ld3.742@trnddc04...
>>>> My 1990 1/2 ton Club Wagon has a 351 FI, E4OD and a 3.55LS.
>>>>
>>>>
>>>>
>>>> More than half the time, but not all the time, at low RPM and light
>>>> throttle, I have a bad "miss." Honestly, it's more like bucking than
>>>> missing. It happens especially badly at around 45 with the tranny in
>>>> 4th, TC locked and just enough throttle to keep it rolling at the same
>>>> speed. Incidentally, it's not as bad when it's cold.
>>>>
>>>>
>>>>
>>>> My estimation was that this was ignition related since that's the times
>>>> where I'm likely to have the most strain on the firing of the plugs.
>>>> However, I've replaced the plugs, wires, cap, and rotor and seen no
>>>> real change.
>>>>
>>>>
>>>>
>>>> I pulled the codes and the only hard fault I have is a 44, which deals
>>>> with the air pump system. I haven't found out what the cause of that
>>>> is, but I wouldn't think that it would cause this. The van just passed
>>>> the Northern Virginia emissions inspection with flying colors, so I'm
>>>> surprised that there's a fault in a part of the emissions system.
>>>>
>>>>
>>>>
>>>> I also had an old EGR related code that I only got from the KOEO test.
>>>> I'm more likely to think an EGR problem would cause the bucking I get.
>>>>
>>>>
>>>>
>>>> Lastly, I tried to do a cylinder balance test, but couldn't get the
>>>> thing to go into the test after the KOER portion. I tried tapping the
>>>> throttle, as my scanner book suggested. I even tried a brief WOT.
>>>>
>>>>
>>>>
>>>> Any help?
>>>>
>>>>
>>>
>>>

>>
>>

>
>



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Old 06-14-2005, 01:11   #6 (permalink)
David M
Guest
 
Posts: n/a
Re: Bucking 351 FI

On Mon, 06 Jun 2005 22:09:29 +0000, CJB rearranged some electrons to form:

> I thought about that too, so I replaced the inline filter. I also doubt
> it's a screen in one of the tanks because the engine does the same thing
> with either tank.
>
> Is there another filter I don't know about?
>
> CJB
>
>
> "SC Tom" <SC@Tom.com> wrote in message news:uN2pe.5676$rt3.1065@fe03.lga...
>> Possibly a fuel filter problem? Had the same symptoms with a '64 Fury and
>> that's what it turned out to be. Only 26 years older than your Club Wagon,
>> LOL.
>> SC Tom
>>
>> "CJB" <colonyparkwagon@excite.nospam> wrote in message
>> news:XB_oe.7704$nr3.7256@trnddc02...
>>> I'm shocked that I haven't received a single response.
>>>
>>> What information can I add that will help?
>>>
>>> CJB
>>>
>>>
>>> "CJB" <colonyparkwagon@excite.nospam> wrote in message
>>> news:9gpoe.3498$ld3.742@trnddc04...
>>>> My 1990 1/2 ton Club Wagon has a 351 FI, E4OD and a 3.55LS.
>>>>
>>>>
>>>>
>>>> More than half the time, but not all the time, at low RPM and light
>>>> throttle, I have a bad "miss." Honestly, it's more like bucking than
>>>> missing. It happens especially badly at around 45 with the tranny in
>>>> 4th, TC locked and just enough throttle to keep it rolling at the same
>>>> speed. Incidentally, it's not as bad when it's cold.
>>>>
>>>>
>>>>
>>>> My estimation was that this was ignition related since that's the times
>>>> where I'm likely to have the most strain on the firing of the plugs.
>>>> However, I've replaced the plugs, wires, cap, and rotor and seen no real
>>>> change.
>>>>
>>>>
>>>>
>>>> I pulled the codes and the only hard fault I have is a 44, which deals
>>>> with the air pump system. I haven't found out what the cause of that
>>>> is, but I wouldn't think that it would cause this. The van just passed
>>>> the Northern Virginia emissions inspection with flying colors, so I'm
>>>> surprised that there's a fault in a part of the emissions system.
>>>>
>>>>
>>>>
>>>> I also had an old EGR related code that I only got from the KOEO test.
>>>> I'm more likely to think an EGR problem would cause the bucking I get.
>>>>
>>>>
>>>>
>>>> Lastly, I tried to do a cylinder balance test, but couldn't get the
>>>> thing to go into the test after the KOER portion. I tried tapping the
>>>> throttle, as my scanner book suggested. I even tried a brief WOT.
>>>>
>>>>
>>>>
>>>> Any help?
>>>>
>>>>
>>>
>>>

>>
>>


Is fuel rail pressure OK?

--
David M (dmacchiarolo)
http://home.triad.rr.com/redsled
T/S 53
sled351 Linux 2.4.18-14 has been up 13 days 3:08

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