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90' Jeep Cherokee Sport

Tiny
IRISHMIDNIGHT
  • MEMBER
  • 1990 JEEP CHEROKEE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 238,000 MILES
Hi,
My jeep has been making revving sounds at around 35 to 45 MPH. I have no idea what it is. I recently had the distributor cap replaced, O2 sensor replaced. New air filer but it has multiple oil leaks. My first thought was that It was the distributor. But I'm not sure. Any ideas on where to look first? Thanks for you time!
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Friday, March 25th, 2011 AT 12:38 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engine light and when was last tune-up?

Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.
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Friday, March 25th, 2011 AT 2:59 AM
Tiny
IRISHMIDNIGHT
  • MEMBER
  • 2 POSTS
The check engine light has not come on. And to be honest.I bought the Jeep in october And have no idea when the last tune up was. So that'll be a start lol. I'll mark down the list you gave me and start working down it. Thanks so much for your time!
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Friday, March 25th, 2011 AT 3:17 AM

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