Well, if it really goes to 0 at idle, you will 'hear' about it. The
valves will start clacking really fast.

Usually that trouble is the sending unit above the oil filter. They are
poor quality and fail lots. The fact it got worse also implies the
sender is fast going dead.

Second is a main bearing, but again if you have mains that bad, you
should be able to hear a knock or rumble vibration at idle.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

ansky wrote:
>
> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
> at 60mph then stopping. I just replaced the oil pump and still have the
> same problem, only worse now. It is an aftermarket pump, could I have just
> installed a bad pump?

 

My '95 ZJ does the same thing and has for a couple years...I've jus been to
cheap and lazy to change the sensor...one of these days!
kinda freaks u out for the first while watching the gauge drop off to
zero...
Jeff
'03 TJ & '95 ZJ



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42C462F7.12FCA4EB@sympatico.ca...
> Well, if it really goes to 0 at idle, you will 'hear' about it. The
> valves will start clacking really fast.
>
> Usually that trouble is the sending unit above the oil filter. They are
> poor quality and fail lots. The fact it got worse also implies the
> sender is fast going dead.
>
> Second is a main bearing, but again if you have mains that bad, you
> should be able to hear a knock or rumble vibration at idle.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> ansky wrote:
>>
>> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
>> at 60mph then stopping. I just replaced the oil pump and still have the
>> same problem, only worse now. It is an aftermarket pump, could I have
>> just
>> installed a bad pump?

 

My '95 ZJ does the same thing and has for a couple years...I've jus been to
cheap and lazy to change the sensor...one of these days!
kinda freaks u out for the first while watching the gauge drop off to
zero...
Jeff
'03 TJ & '95 ZJ



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42C462F7.12FCA4EB@sympatico.ca...
> Well, if it really goes to 0 at idle, you will 'hear' about it. The
> valves will start clacking really fast.
>
> Usually that trouble is the sending unit above the oil filter. They are
> poor quality and fail lots. The fact it got worse also implies the
> sender is fast going dead.
>
> Second is a main bearing, but again if you have mains that bad, you
> should be able to hear a knock or rumble vibration at idle.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> ansky wrote:
>>
>> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
>> at 60mph then stopping. I just replaced the oil pump and still have the
>> same problem, only worse now. It is an aftermarket pump, could I have
>> just
>> installed a bad pump?

 

My '95 ZJ does the same thing and has for a couple years...I've jus been to
cheap and lazy to change the sensor...one of these days!
kinda freaks u out for the first while watching the gauge drop off to
zero...
Jeff
'03 TJ & '95 ZJ



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42C462F7.12FCA4EB@sympatico.ca...
> Well, if it really goes to 0 at idle, you will 'hear' about it. The
> valves will start clacking really fast.
>
> Usually that trouble is the sending unit above the oil filter. They are
> poor quality and fail lots. The fact it got worse also implies the
> sender is fast going dead.
>
> Second is a main bearing, but again if you have mains that bad, you
> should be able to hear a knock or rumble vibration at idle.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> ansky wrote:
>>
>> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
>> at 60mph then stopping. I just replaced the oil pump and still have the
>> same problem, only worse now. It is an aftermarket pump, could I have
>> just
>> installed a bad pump?

 

My '95 ZJ does the same thing and has for a couple years...I've jus been to
cheap and lazy to change the sensor...one of these days!
kinda freaks u out for the first while watching the gauge drop off to
zero...
Jeff
'03 TJ & '95 ZJ



"Mike Romain" <romainm@sympatico.ca> wrote in message
news:42C462F7.12FCA4EB@sympatico.ca...
> Well, if it really goes to 0 at idle, you will 'hear' about it. The
> valves will start clacking really fast.
>
> Usually that trouble is the sending unit above the oil filter. They are
> poor quality and fail lots. The fact it got worse also implies the
> sender is fast going dead.
>
> Second is a main bearing, but again if you have mains that bad, you
> should be able to hear a knock or rumble vibration at idle.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> ansky wrote:
>>
>> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
>> at 60mph then stopping. I just replaced the oil pump and still have the
>> same problem, only worse now. It is an aftermarket pump, could I have
>> just
>> installed a bad pump?

 

Is there a 't' fitting for mechanical oil gauges? ( To be able to leave the
original sender attached, and attach the line for a mechanical gauge?) I
would have attached a mechanical pressure gauge long ago on my son's
wrangler, but haven't done so because of the computer turning on the 'check
gauges' light and sounding a tone when the pressure sender is disconnected.

thanks!

cal


"ansky" <anskyjs@yahoo.com> wrote in message
news:46eff06e181f811b4543e3b5037322ff@localhost.ta lkaboutautos.com...
> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
> at 60mph then stopping. I just replaced the oil pump and still have the
> same problem, only worse now. It is an aftermarket pump, could I have just
> installed a bad pump?
>

 

Is there a 't' fitting for mechanical oil gauges? ( To be able to leave the
original sender attached, and attach the line for a mechanical gauge?) I
would have attached a mechanical pressure gauge long ago on my son's
wrangler, but haven't done so because of the computer turning on the 'check
gauges' light and sounding a tone when the pressure sender is disconnected.

thanks!

cal


"ansky" <anskyjs@yahoo.com> wrote in message
news:46eff06e181f811b4543e3b5037322ff@localhost.ta lkaboutautos.com...
> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
> at 60mph then stopping. I just replaced the oil pump and still have the
> same problem, only worse now. It is an aftermarket pump, could I have just
> installed a bad pump?
>

 

Is there a 't' fitting for mechanical oil gauges? ( To be able to leave the
original sender attached, and attach the line for a mechanical gauge?) I
would have attached a mechanical pressure gauge long ago on my son's
wrangler, but haven't done so because of the computer turning on the 'check
gauges' light and sounding a tone when the pressure sender is disconnected.

thanks!

cal


"ansky" <anskyjs@yahoo.com> wrote in message
news:46eff06e181f811b4543e3b5037322ff@localhost.ta lkaboutautos.com...
> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
> at 60mph then stopping. I just replaced the oil pump and still have the
> same problem, only worse now. It is an aftermarket pump, could I have just
> installed a bad pump?
>

 

Is there a 't' fitting for mechanical oil gauges? ( To be able to leave the
original sender attached, and attach the line for a mechanical gauge?) I
would have attached a mechanical pressure gauge long ago on my son's
wrangler, but haven't done so because of the computer turning on the 'check
gauges' light and sounding a tone when the pressure sender is disconnected.

thanks!

cal


"ansky" <anskyjs@yahoo.com> wrote in message
news:46eff06e181f811b4543e3b5037322ff@localhost.ta lkaboutautos.com...
> 171,000 mi. on 96 4L. Oil pressure drop too 0 after 4 or 5 mi. of running
> at 60mph then stopping. I just replaced the oil pump and still have the
> same problem, only worse now. It is an aftermarket pump, could I have just
> installed a bad pump?
>

 

Cal did pass the time by typing:
> Is there a 't' fitting for mechanical oil gauges? ( To be able to leave the
> original sender attached, and attach the line for a mechanical gauge?) I
> would have attached a mechanical pressure gauge long ago on my son's
> wrangler, but haven't done so because of the computer turning on the 'check
> gauges' light and sounding a tone when the pressure sender is disconnected.

Any brass T fitting that has the right threads will work.

--
DougW