what engine size
The Jeep Grand Cherokee didn't exist until 1993.
if they are the same engine then yes.
on the bottom of the oil pan
it's located under the intake manifold. the knock sensor is most likely ok' the porblem is the short wiring harness from sensor to main wire harness.
It is in front of the starter on my van.1990 350
On my 1990 Cherokee it is on the drivers side underneath against the frame follow the lines
oil pressure switch or knock sensor
The knock sensor on Nissan 300ZX non-turbo from 1990 thru 1996 is located below the lower intake manifold on the rear of the engine block. To replace the knock sensor the upper and lower intake manifolds need to be removed. It is always best to replace the knock sensor with a new one considering its major dissasembly.
It is screewed in the engine block over by the starter.
A 1990 Jeep Cherokee does not have a reset switch. The fuel system is computer controlled. If not functioning properly there could be a fuse or sensor malfunction.
The knock sensor on a Chevy Celebrity 2.8 L engine from 1987 thru 1990 is located on the back side of the engine(next to the firewall) below the exhaust manifold. There are actually two sensors there, one is the knock sensor, the other is the crankshaft position sensor. The knock sensor is threaded into the block with a pipe thread, the crankshaft position sensor is held in with a 10 mm screw and is near the center of the block. They are both accessible with the engine in the car, but they are a bit of a pain to get to.l
The tps (throttle position sensor) would be found on the throttle body, opposite side where the throttle cable is connected.
check the knock sensor if that's not it try the electronic spark control moduel
a 12 mm socket 2 bolts on the back of the caliper
It is screewed into the side of the engine block just in the front of the starter. Right side/passenger side.
In my '95 cherokee, the blower motor resistor is under the glove box. I assume it's about the same on a 1990. I posted instructions (with pictures, so at least you'll know what you're looking for) for replacing it on www.timsjeepblog.com.
You have to especify wich sensor, a cooooomun caor has around 20 different sensors, ( TPS, AIR FLOW METER, Knock sensor, air bags sensors, coolant temperature sensor, etc.) WICH one. HA HA HA HA reddragon
Under the rear of the trannsmission. It's sort of below the firewall just slightly off to the passanger side. Your going to need to get underneath to get to it. It's not too bad of a job ~1 hour, give or take 15 min.
It is in the trough below the EGR and intake manifold alongside the water bypass tube. Be careful with it if you take it out as they appear to be expensive.
? vacum line ? Fuel pump relay or the knock sensor (normally after 2 miles)
It shouldn't. Most production vehicles built from 1990 to date, have a "knock" sensor which accommodates different octane levels.
Check the MAP sensor. To see if this is the problem, assuming that the Jeep won't start but is turning over, unplug the MAP sensor and then plug it back in. If you can start it now, the MAP sensor needs to be replaced. The MAP sensor is located in the engine compartment, where the firewall meets the body at the top of the engine compartment, on the driver's side. Good luck.
Replace the sensorOnce you have changed the oxygen sensor just disconnect the battery cable for about 30 seconds and the computer will reset. If you don't make the repair it will never go away, that's what it is made for.
From memory: My 1990 Jeep Cherokee 4.0L with a manual transmission has the sensor through the top of the transmission bell housing. Two bolts hold it in, and the 3-wire cable runs to a recepticle mounted on the firewall, near where the intake manifold meets the head.