96 Cherokee Hi Oil Pressure
 

I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
after about 1.5 hrs (freeway) the oil pressure started fluctuating between
60-75, when it normally stays about 42 when at anything but idle. I was
turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
continued to fluctuate if I revved higher. This lasted for about 10 minutes
then returned to normal. On the trip home same thing happened but this time
it lasted about 30 minutes.
I'm thinking maybe some gunk got in the oil filter (change every 4K
miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
filter and oil. Any other ideas? Thanks for your help!
--Rocky

Re: 96 Cherokee Hi Oil Pressure
 

Clean the connector at the sensor before you start spending money for parts.
Electronics contact cleaner works best but you can use WD40 in a pinch if
none is available and plug it in and out a couple times.

Good choice to use the synthetics. I need to do my WJ but I have been
waiting for a day when the temp is above freezing.
--
Billy_Ray@fuseSPAM.net (Remove the SPAM)
2002 WJ Brilliant Black Crystal Pearl Coat
Helping is why we are all here on RAMJ+W, or should be.
"Rocky LaRochelle" <rockylarochelle@gmail.com> wrote in message
news:BFC8C12E.1C181%rockylarochelle@gmail.com...
> I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
> after about 1.5 hrs (freeway) the oil pressure started fluctuating between
> 60-75, when it normally stays about 42 when at anything but idle. I was
> turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
> continued to fluctuate if I revved higher. This lasted for about 10
> minutes
> then returned to normal. On the trip home same thing happened but this
> time
> it lasted about 30 minutes.
> I'm thinking maybe some gunk got in the oil filter (change every 4K
> miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
> filter and oil. Any other ideas? Thanks for your help!
> --Rocky
>

Re: 96 Cherokee Hi Oil Pressure
 

Clean the connector at the sensor before you start spending money for parts.
Electronics contact cleaner works best but you can use WD40 in a pinch if
none is available and plug it in and out a couple times.

Good choice to use the synthetics. I need to do my WJ but I have been
waiting for a day when the temp is above freezing.
--
Billy_Ray@fuseSPAM.net (Remove the SPAM)
2002 WJ Brilliant Black Crystal Pearl Coat
Helping is why we are all here on RAMJ+W, or should be.
"Rocky LaRochelle" <rockylarochelle@gmail.com> wrote in message
news:BFC8C12E.1C181%rockylarochelle@gmail.com...
> I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
> after about 1.5 hrs (freeway) the oil pressure started fluctuating between
> 60-75, when it normally stays about 42 when at anything but idle. I was
> turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
> continued to fluctuate if I revved higher. This lasted for about 10
> minutes
> then returned to normal. On the trip home same thing happened but this
> time
> it lasted about 30 minutes.
> I'm thinking maybe some gunk got in the oil filter (change every 4K
> miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
> filter and oil. Any other ideas? Thanks for your help!
> --Rocky
>

Re: 96 Cherokee Hi Oil Pressure
 

Clean the connector at the sensor before you start spending money for parts.
Electronics contact cleaner works best but you can use WD40 in a pinch if
none is available and plug it in and out a couple times.

Good choice to use the synthetics. I need to do my WJ but I have been
waiting for a day when the temp is above freezing.
--
Billy_Ray@fuseSPAM.net (Remove the SPAM)
2002 WJ Brilliant Black Crystal Pearl Coat
Helping is why we are all here on RAMJ+W, or should be.
"Rocky LaRochelle" <rockylarochelle@gmail.com> wrote in message
news:BFC8C12E.1C181%rockylarochelle@gmail.com...
> I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
> after about 1.5 hrs (freeway) the oil pressure started fluctuating between
> 60-75, when it normally stays about 42 when at anything but idle. I was
> turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
> continued to fluctuate if I revved higher. This lasted for about 10
> minutes
> then returned to normal. On the trip home same thing happened but this
> time
> it lasted about 30 minutes.
> I'm thinking maybe some gunk got in the oil filter (change every 4K
> miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
> filter and oil. Any other ideas? Thanks for your help!
> --Rocky
>

Re: 96 Cherokee Hi Oil Pressure
 

I would be cleaning the connection on the oil pressure sender and wire.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Rocky LaRochelle wrote:
>
> I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
> after about 1.5 hrs (freeway) the oil pressure started fluctuating between
> 60-75, when it normally stays about 42 when at anything but idle. I was
> turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
> continued to fluctuate if I revved higher. This lasted for about 10 minutes
> then returned to normal. On the trip home same thing happened but this time
> it lasted about 30 minutes.
> I'm thinking maybe some gunk got in the oil filter (change every 4K
> miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
> filter and oil. Any other ideas? Thanks for your help!
> --Rocky

Re: 96 Cherokee Hi Oil Pressure
 

I would be cleaning the connection on the oil pressure sender and wire.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Rocky LaRochelle wrote:
>
> I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
> after about 1.5 hrs (freeway) the oil pressure started fluctuating between
> 60-75, when it normally stays about 42 when at anything but idle. I was
> turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
> continued to fluctuate if I revved higher. This lasted for about 10 minutes
> then returned to normal. On the trip home same thing happened but this time
> it lasted about 30 minutes.
> I'm thinking maybe some gunk got in the oil filter (change every 4K
> miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
> filter and oil. Any other ideas? Thanks for your help!
> --Rocky

Re: 96 Cherokee Hi Oil Pressure
 

I would be cleaning the connection on the oil pressure sender and wire.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Rocky LaRochelle wrote:
>
> I could use some help with this... Took a 3 hr trip in my 96 4.0HO and
> after about 1.5 hrs (freeway) the oil pressure started fluctuating between
> 60-75, when it normally stays about 42 when at anything but idle. I was
> turning about 2300-2500RPM. Backed off to 1900RPM, pressure went down, but
> continued to fluctuate if I revved higher. This lasted for about 10 minutes
> then returned to normal. On the trip home same thing happened but this time
> it lasted about 30 minutes.
> I'm thinking maybe some gunk got in the oil filter (change every 4K
> miles, synthetic oil, Jeep has 113K on it now). So tomorrow I'm changing
> filter and oil. Any other ideas? Thanks for your help!
> --Rocky