Hi, I have a 2003 2.8L crd Cherokee/Liberty. It has done 65k miles. It has gone into a limp mode but with no cel. Tried clearing the mode but disconnecting battery and but the on off key trick but still in limp mode. Only have 2nd and 3rd gear, very slow acceleration, max 40 mph up a hill and only 60 down hill. Cleaned boost sensor, a bit gunky ( wet and sluggy ). Took it into the jeep dealer to get a diognosis and they said it was a seized waste gate valve. I've read post after post and people seem to be in two minds whether there is a gate gate valve or not, but looking through the workshop manual, it shows there is one and it looks like the garage is suggesting that the actuator in the waste gate is seized, not sure whether it is open or closed, but it has told the ecu to go into limp mode. From what I have read, dealers automatically blame the turbo for everything.
one point to mention is that when the car is turned off, there is a sucking noise coming from a black box with thin air tubes coming from and to it. It has a filter underneath it and one of the lines goes to the erg valve. This carries on sucking for a few minutes. I don't know if it is related.
I had a go at removing the turbo but got as far as removing the erg valve and cooler but couldn't get to the retaining nuts for the valve so had to stop and wanted to get clarification on the diagnosis before removing the exhaust manifold.
Everything is now back together while I debate what to do. If it is a stuck waste gate valve, is it something I can try and free if the turbo is removed or do I need to send it to a turbo centre?
When all the hoses were off, where was a good coating of oil in all of them even going through the air cooler before going into the intake manifold, is this right? I also checked that the turbine spun freely which it did and you can hear it whine happily when driving, it just isn't having any effect.
I'm no mechanic, I just like to fix as much as I can, which has worked in the past, but not sure if this is too much for me. I hope my terminology is near correct, I have done a bit of homework on it.
Can anyone help?
one point to mention is that when the car is turned off, there is a sucking noise coming from a black box with thin air tubes coming from and to it. It has a filter underneath it and one of the lines goes to the erg valve. This carries on sucking for a few minutes. I don't know if it is related.
I had a go at removing the turbo but got as far as removing the erg valve and cooler but couldn't get to the retaining nuts for the valve so had to stop and wanted to get clarification on the diagnosis before removing the exhaust manifold.
Everything is now back together while I debate what to do. If it is a stuck waste gate valve, is it something I can try and free if the turbo is removed or do I need to send it to a turbo centre?
When all the hoses were off, where was a good coating of oil in all of them even going through the air cooler before going into the intake manifold, is this right? I also checked that the turbine spun freely which it did and you can hear it whine happily when driving, it just isn't having any effect.
I'm no mechanic, I just like to fix as much as I can, which has worked in the past, but not sure if this is too much for me. I hope my terminology is near correct, I have done a bit of homework on it.
Can anyone help?
