Welcome Visitor! Please take a few seconds and - Joined
- Jun 1, 2001
- Messages
- 7,897
- Reaction score
- 137
- Age
- 63
- Location
- East-Central Pennsylvania
- Vehicle Year
- 1987... sorta
- Make / Model
- Ford
- Engine Size
- '93 4.0
- Transmission
- Manual
I see this time and time again "my engine does this and that!"
And there's usually a raft full of followup questions people ask
trying to work the problem....
In my considered opinion the FIRST intelligent question is the one where someone
asks "Have you changed the fuel filter"
All OTHER questions are jumping ahead in the logical thought process
It's like someone saying "I saw a dead animal alongside the road!" and
all the immediate follow-up questions are describing the different known
species of unicorn....
If you suspect that one of your legs is suddenly shorter than the other
you think ya'll might look to see if you are wearing shoes that match
rather than a wrestling flat on one foot and a cowboy boot on the
other before you rush off to see an orthopedic surgeon to shorten the long leg?
Lack of power on a 4.0 is more often not a fuel issue, because the ignition
generally works... or it doesn't.
there is no question of the ignition of the engine runns at all because the
two common modes are workign perfectly or not at all anything else would
be very odd... one in 10,000.
And if the fuel filter doesn't work pull the lid off the airbox and check for
leaves mouse nests and dead chipmunks (the crap collects UNDER the filter)
Last fall I had a problem, a noticeable "lack of power", I replaced the fuel filter
and it didn't go away... next on my thoughts was the airbox...
what did I find? it was packed full of that silky crap that the rag weed and milk
weed plants use to distribute their seeds on the wind....
Yup my airbox had collected about a pound of the stuff and it was
obstructing airflow into the engine... problem solved... never even
thought of reaching for my EEC4 scanner (I have a good one too, not a $20 "beep box")
Next on my list would have been pulling the spark wirees out of the coil packs
one by one and looking inside, if you see anything other than shiny aluminum
(or brass on an aftermarket "performance coil pack) you've probably found
your problem, but ignition doesn't cause a general lack of power it cause
uneven idle or an outright "miss" ranging from a "soft miss" that you only notice
under specific circumstances to a "hard miss" which is constant under ALL circumstances.
spark plugs can cause some weirdness, generally worn plugs will idle great,
but will only misbehave at high rpm or under heavy load that's because the
bigger the gap or the higher the load even the harder it is to fire the mixture
I might have reached for my code scanner if I had needed to but...
please check the "Stupid stuff" before posting....
AD
And there's usually a raft full of followup questions people ask
trying to work the problem....
In my considered opinion the FIRST intelligent question is the one where someone
asks "Have you changed the fuel filter"
All OTHER questions are jumping ahead in the logical thought process
It's like someone saying "I saw a dead animal alongside the road!" and
all the immediate follow-up questions are describing the different known
species of unicorn....
If you suspect that one of your legs is suddenly shorter than the other
you think ya'll might look to see if you are wearing shoes that match
rather than a wrestling flat on one foot and a cowboy boot on the
other before you rush off to see an orthopedic surgeon to shorten the long leg?
Lack of power on a 4.0 is more often not a fuel issue, because the ignition
generally works... or it doesn't.
there is no question of the ignition of the engine runns at all because the
two common modes are workign perfectly or not at all anything else would
be very odd... one in 10,000.
And if the fuel filter doesn't work pull the lid off the airbox and check for
leaves mouse nests and dead chipmunks (the crap collects UNDER the filter)
Last fall I had a problem, a noticeable "lack of power", I replaced the fuel filter
and it didn't go away... next on my thoughts was the airbox...
what did I find? it was packed full of that silky crap that the rag weed and milk
weed plants use to distribute their seeds on the wind....
Yup my airbox had collected about a pound of the stuff and it was
obstructing airflow into the engine... problem solved... never even
thought of reaching for my EEC4 scanner (I have a good one too, not a $20 "beep box")
Next on my list would have been pulling the spark wirees out of the coil packs
one by one and looking inside, if you see anything other than shiny aluminum
(or brass on an aftermarket "performance coil pack) you've probably found
your problem, but ignition doesn't cause a general lack of power it cause
uneven idle or an outright "miss" ranging from a "soft miss" that you only notice
under specific circumstances to a "hard miss" which is constant under ALL circumstances.
spark plugs can cause some weirdness, generally worn plugs will idle great,
but will only misbehave at high rpm or under heavy load that's because the
bigger the gap or the higher the load even the harder it is to fire the mixture
I might have reached for my code scanner if I had needed to but...
please check the "Stupid stuff" before posting....
AD
Last edited:
Even those don't help me much, I'm to easily distracted- oh, that sure is shiny/cool, wonder if I can make one
]
