SharkXJ
NAXJA Member #1177
- Location
- San Jose, CA
Hi Fellow XJer's,
First off - here are my Jeep Details:
2001, 122k miles, AW4, 4.0, 6" lift on 35's with 4:56 gears
Over the past 6 or 8 months I have been getting a high whistling sound from the motor. It used to go away when the motor warmed up and now it is pretty constant. Check engine light is on with an EVAP leak code (don't have the exact code). I did a visual and even used a can of carb cleaner to see if I could find the evap leak and nothing. I have done this twice. Did some reading and I am tempted to change the AVAP Sensor and Filter but I don't think that's what caused today's issue.
About 5 months ago I took it in and had the Spark Plugs and Coil Pack Replaced (Mis fired pretty bad and found out # 5 & 6 on the rail were bad). My mechanic said they found an evap line at the gas tank that was dis connected. Errod code went away for about a week and well - needless to say that wasn't the issue.
This morning when I went to start the Jeep, I got a loud slapping sound that was consistant with the motor speed, i.e. I would hit the gas and it would increase. As the motor warmed up it went away but the whistle is still there. Got on the freeway and it started to hesitate so I pulled over and then it was driving "OK".
So - with my experiences in the XJ world this sounds like either a cracked exhaust manifold or exhaust manifold gasket.
Any and all input would be greatly appreciated.
Have a good one,
Mark
First off - here are my Jeep Details:
2001, 122k miles, AW4, 4.0, 6" lift on 35's with 4:56 gears
Over the past 6 or 8 months I have been getting a high whistling sound from the motor. It used to go away when the motor warmed up and now it is pretty constant. Check engine light is on with an EVAP leak code (don't have the exact code). I did a visual and even used a can of carb cleaner to see if I could find the evap leak and nothing. I have done this twice. Did some reading and I am tempted to change the AVAP Sensor and Filter but I don't think that's what caused today's issue.
About 5 months ago I took it in and had the Spark Plugs and Coil Pack Replaced (Mis fired pretty bad and found out # 5 & 6 on the rail were bad). My mechanic said they found an evap line at the gas tank that was dis connected. Errod code went away for about a week and well - needless to say that wasn't the issue.
This morning when I went to start the Jeep, I got a loud slapping sound that was consistant with the motor speed, i.e. I would hit the gas and it would increase. As the motor warmed up it went away but the whistle is still there. Got on the freeway and it started to hesitate so I pulled over and then it was driving "OK".
So - with my experiences in the XJ world this sounds like either a cracked exhaust manifold or exhaust manifold gasket.
Any and all input would be greatly appreciated.
Have a good one,
Mark