Always check the simple S#it,...

[JENSSEN]

So after 2 weeks of throwing parts at the "new" 1988 Manche trying to fix the stumble at intersections and rough idle I sat down and though about simple stuff.

 

Ok so I did cap, rotor, fuel treatment, TBI cleaning, o2 sensor, checked vacume lines, EGR, MAP sensor all the typical stuff, still rough idle,....

 

Then I thought about the o2 sensor and the colour of it,.. And all I could think is if that was a plug that's lean!

 

So I did a fuel gas test at the manifold and no change, so I went a level more simple grabbed a wrench and checked bolts on the intake and exhaust,... One on the exhaust was missing and the next loose, 3/4 - 1 full turn and fawk me it runs amazing!

 

Now an oil change and rocker arm retorque ( a bit noisy ) ,...

 

Finally it purrs!! Viva 2.5L tower of power! Guess a 4.0 swap will have to wait!

[Dirteatr717]

Same with me today :doh: thought my slave went so I started takingthe crossmember off and spraying every nut and bolt with pb blaster.... Ate some lunch did some research, came back to it a few hours later and just looked around underneath my truck to notice the clutch line blown open... Not a bad fix at all, just have to locate one :roll:

[vaquaro]

:thumbsup: Did you ever think the learning curve on our trucks is actually a vertical line ??? :cheers:

So after 2 weeks of throwing parts at the "new" 1988 Manche trying to fix the stumble at intersections and rough idle I sat down and though about simple stuff.

 

Ok so I did cap, rotor, fuel treatment, TBI cleaning, o2 sensor, checked vacume lines, EGR, MAP sensor all the typical stuff, still rough idle,....

 

Then I thought about the o2 sensor and the colour of it,.. And all I could think is if that was a plug that's lean!

 

So I did a fuel gas test at the manifold and no change, so I went a level more simple grabbed a wrench and checked bolts on the intake and exhaust,... One on the exhaust was missing and the next loose, 3/4 - 1 full turn and fawk me it runs amazing!

 

Now an oil change and rocker arm retorque ( a bit noisy ) ,...

 

Finally it purrs!! Viva 2.5L tower of power! Guess a 4.0 swap will have to wait!

[JENSSEN]

Well with the 2.5L Motor I would agree! I know a 4.0L like the back of my hand, I can figure those out usually pretty damn quick. Now with owning 3 Comanches , two of which are 2.5L ones I feel that I will know those really well shortly as well LOL

 

[vaquaro]

:idea: I realized it had been awhile since I checked the manifold bolts ( thanks to your post ) YUP they were loose as well , tightened for now but next weekend new gaskets ,lock-tite , and re-torque :thumbsup: