Hi fellow jeepers,
For the past year or so i have been facing issues with my TJ (1997, 2.5l, manual) and i ve been hoping i get your advise of what might be based on the info below
On random occasions my jeep starts jerking and bucking and missfiring.
It can happen after a mile of driving or after 30 miles of driving. Its randomly happening (usally when its hot though) and once every few days.
It always happens on 1st or 2nd and sometimes on 3rd gear ( never happened on 4th or 5th)
When it starts jerking i get no errors, no check engine light and my rpm jumps from 500 to 1500 continuously. At the same time its missfiring and i can smell gas from the exaust like its not burning right.
If i switch off and switch on again it then runs normal.
Somewhere here i have to mention that i ve got a cracked manifold but its been cracked on the same spot few years now and never caused any related issues.
When I started facing this issue it was giving an error that the CPS sensor was faulty so i replaced it and the error dissappear. Few days later i had the same issue but on less occasion.
Also to mention (even though might not be related), the issue started the day my mechanic replaced my transmission gasket.
Reading on old posts to a similar issues i know that it could be a clocked catalyst, or O2 sensor, or TPS sensor or event a faulty fuel pump but i am hoping based on the the information up it can indicate to something more specific. Unfortunately i live on a small island in Europe making it hard and expensive for me to get parts and would like to avoid spending money on something that it might not be related and therefore writting this post
Could be the cracked manifold? If it was the manifold i would face the same issue way before?
Could it be my catalyst converter? Would it happen only on 1st, 2nd and 3rd gear though or will it be doing it on any speed if a clocked catalyst?
If its the TPS sensor, should i get an error code?
Maybe its indeed the CPS sensor and the new one is not good?
Could it be the O2 sensor and maybe a reason am getting cracked manifolds ( changed few over the years)?
Sorry for all the questions
Thank you in advance
For the past year or so i have been facing issues with my TJ (1997, 2.5l, manual) and i ve been hoping i get your advise of what might be based on the info below
On random occasions my jeep starts jerking and bucking and missfiring.
It can happen after a mile of driving or after 30 miles of driving. Its randomly happening (usally when its hot though) and once every few days.
It always happens on 1st or 2nd and sometimes on 3rd gear ( never happened on 4th or 5th)
When it starts jerking i get no errors, no check engine light and my rpm jumps from 500 to 1500 continuously. At the same time its missfiring and i can smell gas from the exaust like its not burning right.
If i switch off and switch on again it then runs normal.
Somewhere here i have to mention that i ve got a cracked manifold but its been cracked on the same spot few years now and never caused any related issues.
When I started facing this issue it was giving an error that the CPS sensor was faulty so i replaced it and the error dissappear. Few days later i had the same issue but on less occasion.
Also to mention (even though might not be related), the issue started the day my mechanic replaced my transmission gasket.
Reading on old posts to a similar issues i know that it could be a clocked catalyst, or O2 sensor, or TPS sensor or event a faulty fuel pump but i am hoping based on the the information up it can indicate to something more specific. Unfortunately i live on a small island in Europe making it hard and expensive for me to get parts and would like to avoid spending money on something that it might not be related and therefore writting this post
Could be the cracked manifold? If it was the manifold i would face the same issue way before?
Could it be my catalyst converter? Would it happen only on 1st, 2nd and 3rd gear though or will it be doing it on any speed if a clocked catalyst?
If its the TPS sensor, should i get an error code?
Maybe its indeed the CPS sensor and the new one is not good?
Could it be the O2 sensor and maybe a reason am getting cracked manifolds ( changed few over the years)?
Sorry for all the questions
Thank you in advance
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