truck has straight duals off of each manifold.... no oxygen sensor.
you start the truck up from sitting overnight, take off down the
driveway, runs fine. no problems. no check engine light.
but once it warms up at all the problems start.
it begins to hesitate badly, acts like it runs on like 3 or 4
cylinders with NO power... not even enough to move it in 1st gear.
then another problem starts.
its got 15w40 in the motor ... and its full, but once it warms up
enough to flow the oil real good the oil pressure drops and drops and
drops... like dead buried in the L at 1000 rpm or so... then the check
engine light comes on... and all the time the motor is running
horribly.... bad oil pump ?
wtf is going on with this thing ?!?! are there any resident experts in
here because its not worth taking to a mechanic, it won’t even make it
there.
"tubjub" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_683768_3def6034297202188873b905158310b7@autoforumz.com...
> 88 ford f150 ... 5-speed, 302, 2wd, dual tanks
>
> problems....
>
> truck has straight duals off of each manifold.... no oxygen sensor.
>
> you start the truck up from sitting overnight, take off down the
> driveway, runs fine. no problems. no check engine light.
>
> but once it warms up at all the problems start.
>
> it begins to hesitate badly, acts like it runs on like 3 or 4
> cylinders with NO power... not even enough to move it in 1st gear.
>
> then another problem starts.
>
> its got 15w40 in the motor ... and its full, but once it warms up
> enough to flow the oil real good the oil pressure drops and drops and
> drops... like dead buried in the L at 1000 rpm or so... then the check
> engine light comes on... and all the time the motor is running
> horribly.... bad oil pump ?
>
> wtf is going on with this thing ?!?! are there any resident experts in
> here because its not worth taking to a mechanic, it won't even make it
> there.
>
> plz help
>
> jake
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL: http://www.autoforumz.com/Ford-help-ftopict141409.html
> Visit Topic URL to contact author (reg. req'd). Report abuse:
> http://www.autoforumz.com/eform.php?p=683768
My truck was doing something similar recently. I went though the usual cap,
rotor, plugs, etc. and it ran a little better. These things were in need of
replacing. The thing that fixed it up was cleaning the throttle body, IAC
valve, and the connector for the throttle position sensor. It now runs like
a champ again. My truck is a '90 302 auto 4x4, but I'm sure the same would
apply to your truck.
Chris
"tubjub" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_683768_3def6034297202188873b905158310b7@autoforumz.com...
> 88 ford f150 ... 5-speed, 302, 2wd, dual tanks
>
> problems....
>
> truck has straight duals off of each manifold.... no oxygen sensor.
>
> you start the truck up from sitting overnight, take off down the
> driveway, runs fine. no problems. no check engine light.
>
> but once it warms up at all the problems start.
>
> it begins to hesitate badly, acts like it runs on like 3 or 4
> cylinders with NO power... not even enough to move it in 1st gear.
>
> then another problem starts.
>
> its got 15w40 in the motor ... and its full, but once it warms up
> enough to flow the oil real good the oil pressure drops and drops and
> drops... like dead buried in the L at 1000 rpm or so... then the check
> engine light comes on... and all the time the motor is running
> horribly.... bad oil pump ?
>
> wtf is going on with this thing ?!?! are there any resident experts in
> here because its not worth taking to a mechanic, it won't even make it
> there.
>
> plz help
>
> jake
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL: http://www.autoforumz.com/Ford-help-ftopict141409.html
> Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.autoforumz.com/eform.php?p=683768
tubjub wrote:
> 88 ford f150 ... 5-speed, 302, 2wd, dual tanks
>
> problems....
>
> truck has straight duals off of each manifold.... no oxygen sensor.
>
> you start the truck up from sitting overnight, take off down the
> driveway, runs fine. no problems. no check engine light.
>
> but once it warms up at all the problems start.
>
> it begins to hesitate badly, acts like it runs on like 3 or 4
> cylinders with NO power... not even enough to move it in 1st gear.
>
> then another problem starts.
>
> its got 15w40 in the motor ... and its full, but once it warms up
> enough to flow the oil real good the oil pressure drops and drops and
> drops... like dead buried in the L at 1000 rpm or so... then the check
> engine light comes on... and all the time the motor is running
> horribly.... bad oil pump ?
>
> wtf is going on with this thing ?!?! are there any resident experts in
> here because its not worth taking to a mechanic, it won’t even make it
> there.
>
> plz help
>
> jake
>
You have a few problems. You screwed the pooch when you put duals on it
and no O2 sensor made it even worse. Duals can really cut into low end
performance and responce big time and the smaller the motor the worse it
can be. Second problem is it sonds like bearings are shot on crank
because once oil warms up and thins out pressure goes to zero or really
low. There are no cheap magic fixes to your problems.
>
> You have a few problems. You screwed the pooch when you put duals on it
> and no O2 sensor made it even worse. Duals can really cut into low end
> performance and responce big time and the smaller the motor the worse it
> can be. Second problem is it sonds like bearings are shot on crank
> because once oil warms up and thins out pressure goes to zero or really
> low. There are no cheap magic fixes to your problems.
>
Good answers, in my opinion. I advise you listen to this, and also I want to
add something:
Don't be fooled with that gage. It's not really an oil pressure gage. It
only has two modes: "some" and "none". So that's why it drops suddenly.
That's the only way it can drop. It's basically wired up like an oil light.
And it's your oil light that is coming on when the engine warms up.
Could be the sender, if you're lucky. If you're not a total moron, you'll
probably realize that you need to double check your oil pressure before
taking drastic action.
The two problems are totally unrelated. Don't try to convince yourself that
there's some connection. There's not.
Was the exhaust changed from original? I was wondering if the O2 sensor was
by passed. The ECM would work ok cold as the sensors are not on line yet,
the computer is running on default settings
"c" <c@me.org> wrote in message
news:ktY1f.71711$mb4.48195@tornado.rdc-kc.rr.com...
> My truck was doing something similar recently. I went though the usual
> cap,
> rotor, plugs, etc. and it ran a little better. These things were in need
> of
> replacing. The thing that fixed it up was cleaning the throttle body, IAC
> valve, and the connector for the throttle position sensor. It now runs
> like
> a champ again. My truck is a '90 302 auto 4x4, but I'm sure the same would
> apply to your truck.
>
> Chris
>
> "tubjub" <UseLinkToEmail@AutoForumz.com> wrote in message
> news:1_683768_3def6034297202188873b905158310b7@autoforumz.com...
>> 88 ford f150 ... 5-speed, 302, 2wd, dual tanks
>>
>> problems....
>>
>> truck has straight duals off of each manifold.... no oxygen sensor.
>>
>> you start the truck up from sitting overnight, take off down the
>> driveway, runs fine. no problems. no check engine light.
>>
>> but once it warms up at all the problems start.
>>
>> it begins to hesitate badly, acts like it runs on like 3 or 4
>> cylinders with NO power... not even enough to move it in 1st gear.
>>
>> then another problem starts.
>>
>> its got 15w40 in the motor ... and its full, but once it warms up
>> enough to flow the oil real good the oil pressure drops and drops and
>> drops... like dead buried in the L at 1000 rpm or so... then the check
>> engine light comes on... and all the time the motor is running
>> horribly.... bad oil pump ?
>>
>> wtf is going on with this thing ?!?! are there any resident experts in
>> here because its not worth taking to a mechanic, it won't even make it
>> there.
>>
>> plz help
>>
>> jake
>>
>> --
>> Posted using the http://www.autoforumz.com interface, at author's request
>> Articles individually checked for conformance to usenet standards
>> Topic URL: http://www.autoforumz.com/Ford-help-ftopict141409.html
>> Visit Topic URL to contact author (reg. req'd). Report abuse:
> http://www.autoforumz.com/eform.php?p=683768
>
>
I had the same problem with oil pressure. I even tried going to straight 40W
oil with no change.
I removed the sending unit, and screwed a hose where the sending unit was,
(its was 1/8 pipe thread) and hooked a regular pressure gauge to the hose
and started the engine. Oil pressure was well within range. It was my
sending unit. You could try that before a re-build and still having the same
oil pressure "problem". Save some $$$
"tubjub" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_683768_3def6034297202188873b905158310b7@autoforumz.com...
> 88 ford f150 ... 5-speed, 302, 2wd, dual tanks
>
> problems....
>
> truck has straight duals off of each manifold.... no oxygen sensor.
>
> you start the truck up from sitting overnight, take off down the
> driveway, runs fine. no problems. no check engine light.
>
> but once it warms up at all the problems start.
>
> it begins to hesitate badly, acts like it runs on like 3 or 4
> cylinders with NO power... not even enough to move it in 1st gear.
>
> then another problem starts.
>
> its got 15w40 in the motor ... and its full, but once it warms up
> enough to flow the oil real good the oil pressure drops and drops and
> drops... like dead buried in the L at 1000 rpm or so... then the check
> engine light comes on... and all the time the motor is running
> horribly.... bad oil pump ?
>
> wtf is going on with this thing ?!?! are there any resident experts in
> here because its not worth taking to a mechanic, it won't even make it
> there.
>
> plz help
>
> jake
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL: http://www.autoforumz.com/Ford-help-ftopict141409.html
> Visit Topic URL to contact author (reg. req'd). Report abuse:
> http://www.autoforumz.com/eform.php?p=683768
>
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Linear Mode
