Hello all! I am new to this forum and working on Jeeps in general. I recently bought a 2002 TJ sport. I bought the car knowing the engine light was on and it ran the lean engine codes for both the front two banks. I first replaced my 02 sensors. Nothing. Then I checked for leaks in the vacuum lines and didn't see any. Further research showed that it could be a leak in the intake/ exhaust gasket which would be allowing the excess air in (plus I always thought the Jeep was extra loud). To test this theory, I used my shop vac (on reverse) and put it into the tailpipe. I then sprayed soapy water throughout the exhaust (upstream of the two mini cats) and found bubbles at the gasket (right next to the number 6 bolt/nut). I have now replaced the gasket and re-torqued the intake to the block. Before I wasted any more time putting the car back together, I performed the leak test again. I am still leaking at the number 6 bolt/nut and now seem to be leaking at the number 3 bolt. I'm assuming this is not supposed to happen (even though I'm pumping air into the exhaust while it will normally be flowing the other direction). Please help! Any guidance is much appreciated!
Hello all! I am new to this forum and working on Jeeps in general. I recently bought a 2002 TJ sport. I bought the car knowing the engine light was on and it ran the lean engine codes for both the front two banks. I first replaced my 02 sensors. Nothing. Then I checked for leaks in the vacuum lines and didn't see any. Further research showed that it could be a leak in the intake/ exhaust gasket which would be allowing the excess air in (plus I always thought the Jeep was extra loud). To test this theory, I used my shop vac (on reverse) and put it into the tailpipe. I then sprayed soapy water throughout the exhaust (upstream of the two mini cats) and found bubbles at the gasket (right next to the number 6 bolt/nut). I have now replaced the gasket and re-torqued the intake to the block. Before I wasted any more time putting the car back together, I performed the leak test again. I am still leaking at the number 6 bolt/nut and now seem to be leaking at the number 3 bolt. I'm assuming this is not supposed to happen (even though I'm pumping air into the exhaust while it will normally be flowing the other direction). Please help! Any guidance is much appreciated!
So further investigation shows there is some corrosion near the front-most exhaust port (right next to the 6 nut/bolt). I am going to try and take a wire wheel to this area to get the surface more flush, but does this look particularly bad? Do I need to have the cylinder head resurfaced?
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