oil pressure switch
Junior Member
Joined: Oct 2010
Posts: 34
Likes: 0
Year: 1996
Model: Cherokee
Engine: 4.0
I just changed mine because it was pegged. I bought it from autozone as well. It made no difference still pegged and i'm scratching my head my jeep has 130000 miles and its starting to nickle and dime me
Seasoned Member
Joined: May 2010
Posts: 406
Likes: 0
From: Suffolk long island
Year: 1994
Model: Cherokee
Engine: 4.0 L I6
you might have gotten the wrong one, im interested in knowing if Fsher21's hypothesis is correct in saying that gauges have one pin and switches have 2 pins. It doesnt hurt to check and see if u got the wrong one it seems like everyone is getting the wrong one. Autozone asked me which one i wanted..
Senior Member
Joined: May 2010
Posts: 882
Likes: 1
From: MI 48642
Year: 1996
Model: Cherokee
Engine: 4.0
ok, so after a barefooted hike in 9 degrees, I found the switch in my center console. It has two terminals, pegs, what ever you want to call them lol. I think I threw away the box it came in, but it was in the box from the correct sending unit. For my 96' sport, advanced auto sold me part #S4133 with the BWD name.
Senior Member
Joined: Jan 2011
Posts: 730
Likes: 2
From: Joliet, Il
Year: 1996
Model: Cherokee
Engine: HO4.0 I6
i'm about to check mine out and see if it is the wrong unit. I'll post a picture with the pin side showing so we can determine which one it is. Also, do you guys recommend going through Jeep to get the new sending unit? Or going to an auto parts store (obviously not Autozone though...)
Thread Starter
Junior Member
Joined: Feb 2011
Posts: 51
Likes: 0
Year: 1994
Model: Cherokee
Engine: straight 6 4.0 L
Originally Posted by tjwalker
Fist off, the oil pressure is supposed to fluctuate on the gauge. That is the nature of the internal combustion engine. Should not be less than 13 psi at a hot idle and between 37-75 over 1600 rpms.
Describe EXACTLY what you see.
If it is not acting normally, where did you buy this part?
There have been a lot of threads with people having trouble with aftermarket oil pressure sending units.
I have had mixed (poor) luck with aftermarket sending units. I buy plenty of aftermarket parts, but the crank sensor and the oil pressure sending unit should come from JEEP for best reliability.
I worked in Engineering for 23 years for Honeywell, where we supplied OEM sensors to the automotive industry. There is a HUGE difference in reliability/longevity of sensor brands.
Describe EXACTLY what you see.
If it is not acting normally, where did you buy this part?
There have been a lot of threads with people having trouble with aftermarket oil pressure sending units.
I have had mixed (poor) luck with aftermarket sending units. I buy plenty of aftermarket parts, but the crank sensor and the oil pressure sending unit should come from JEEP for best reliability.
I worked in Engineering for 23 years for Honeywell, where we supplied OEM sensors to the automotive industry. There is a HUGE difference in reliability/longevity of sensor brands.
CF Veteran
Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Can't tell you how many times I've responded to a thread with a bad aftermarket oil pressure sending unit.
Buy em at Jeep folks.....they cost an extra $20, but it is money well spent.
Member
Joined: May 2009
Posts: 193
Likes: 0
From: Rochester NY
Year: 1996
Model: Cherokee
Engine: 4.0l
Yea, dealer sending unit is the way to go for quality, but I got caught once when the parts guy grabed a sending unit for a Grand Cherokee instead of a stock cherokee. They look and mount the same, but the gauge pegged at 80psi and did not even come down to zero with the engine off. The parts guy looked up the stock number and saw He goofed and gave me the correct one and everything was Ok after installing it.
Never know if aftermarket part was for a Grand Cherokee when the parts employee is an 18 yr old rookie.
Never know if aftermarket part was for a Grand Cherokee when the parts employee is an 18 yr old rookie.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
ok, so after a barefooted hike in 9 degrees, I found the switch in my center console. It has two terminals, pegs, what ever you want to call them lol. I think I threw away the box it came in, but it was in the box from the correct sending unit. For my 96' sport, advanced auto sold me part #S4133 with the BWD name.
Senior Member
Joined: Jan 2011
Posts: 730
Likes: 2
From: Joliet, Il
Year: 1996
Model: Cherokee
Engine: HO4.0 I6
Just bought a sending unit from Advanced and popped it in. I actually get a reading now. It stays between 43-55 (rough estimates) at all times, even at idle and driving.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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