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1996 jeep charokee country, i just replaced the oil sending unit due to oil running out of the back of it. now the engine is hard to start. it seams like the battery is dead. I had the battery tested it is great and they even used a buster to see if it would help (no difference). sometimes I dont think it will even turn over. that is how bad it has gotten. What can I do. Any help out there.
thank you
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If the oil pressure is not above 5 or 10psi, the fuel pump will not get power. The engine should start and die. The pressure sending unit may be faulty, or the engine oil pressure may be very low.
Hi there: It sounds like it could be oil pressure sending unit. I would check the connection on the sending unit. Below are the procedures for checking the sending unit, If it checks out good I would have a mechanical gauge set up to measure the pressure.
TESTINGTo test the normally closed oil lamp circuit, disengage the locking connector and measure the resistance between the switch terminal (terminal for the wire to the warning lamp) and the metal housing. The ohmmeter should read 0 ohms.To test the sending unit, measure the resistance between the sending unit terminal and the metal housing. The ohmmeter should read an open circuit (infinite resistance).Start the engine.Once again, test each terminal against the metal housing:The oil switch terminal-to-housing circuit should read an open circuit if there is oil pressure present.The sending unit-to-housing circuit should read between 15-80 ohms, depending on the engine speed, oil temperature and oil viscosity.To test the oil pressure sender only, rev the engine and watch the ohms reading, which should fluctuate slightly (within the range of 15-80 ohms) as rpm increases.If the above results were not obtained, replace the sending unit/switch with a new one.
Check your spark plug, wires, distributor cap and finger. If you spark plugs older than 15000ml, replace them. To check your spark plug wires, use a tester (U can buy at any auto store) you hold direct on the wire and a small sparkling will show you if the wire works or not. You can check the wires also with this: use a single spark plug (don't remove one out your engine!), remove the wire from first SP, connect it with the single SP, hold it to ground, let someone start your engine...you need to see regular sparks.. do this step by step with all 6 wires. If all wires are fine, check the SP's, If you miss on one wire, replace the wire, if you miss on more than one, chekc the distributor cap and finger. If this items are older than 20000ml or 5 years, replace them.
does your jeep run rough? idle is real low? and when you are driving and push the gas hard it doesnt want to move? if so it is most likely the mass air flow sensor. i had to replace that 2 or 3 times on my 1999 jeep cherokee
if your jeep is a diesel it is normal for the oil to turn black, if the jeep is a petrol, then that is not normal, try using engine flush before a oil change, and make sure that you change the oil filter while the sump plug is off, this will make sure that all the oil is drained, the oil filter does have about .75 liters of oil.
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