87warrior
NAXJA Forum User
- Location
- Junction City, KS
1992 Comanche, 4.0 HO, 190K miles.
I picked this truck up in January and have been getting just the way I like it. She will run down the highway and gets around 19mpg, which is great. However, when it sits at idle, rather it be in drive or park, she runs rough and is running rich (exhaust smell).
I have done the following to fix this issue:
- Replaced spark plugs and gaped
- Replaced distributor cap/rotor
- Replaced coolant temp sender
- Replaced air filter
- Checked all vacuum lines and caped/replaced as needed
- Checked fuel pressure (32psi at idle)
- Replaced IAC with one from my folks 93 XJ that runs perfect
It is not throwing a check engine light and runs fine in all parts of the power band except idle. During the cold weather it is even worse at loading up. The truck does have a small crack in the exhaust manifold.
Thanks for any tips or suggestions.
I picked this truck up in January and have been getting just the way I like it. She will run down the highway and gets around 19mpg, which is great. However, when it sits at idle, rather it be in drive or park, she runs rough and is running rich (exhaust smell).
I have done the following to fix this issue:
- Replaced spark plugs and gaped
- Replaced distributor cap/rotor
- Replaced coolant temp sender
- Replaced air filter
- Checked all vacuum lines and caped/replaced as needed
- Checked fuel pressure (32psi at idle)
- Replaced IAC with one from my folks 93 XJ that runs perfect
It is not throwing a check engine light and runs fine in all parts of the power band except idle. During the cold weather it is even worse at loading up. The truck does have a small crack in the exhaust manifold.
Thanks for any tips or suggestions.