In my 1988 YJ with the 4.2 engine block and 4.0 head, the intake and exhaust manifolds are likely stock for the 4.2. I’ve bypassed the Jeep’s computer (nuttered it), so I’m not using the knock sensor, coolant sensor in the intake manifold, or the oxygen sensor in the exhaust manifold. I want to remove these sensors and install plugs, but I’m having trouble finding the right plugs for these ports. Does anyone have suggestions on where I can get these plugs?
Taking the intake manifold off is unnecessary to change the spark plugs on a 3.7 engine.
It seems like you need to replace the air filters, spark plugs, and MAF sensors in addition to cleaning the gas tank and adding a can of sea foam. To resolve a problem like this, start there.
I had never seen the removal of the intake manifold for coils and sparks, so I wasn’t sure why it would be necessary. After cleaning the sensors the other day, I placed an order for new Hitachi ones because I was still receiving errors. Since there aren’t any obvious breaks in my intakes or lines, I might as well replace the gasket for peace of mind.
I apologize; I guess this isn’t that bad of a failure. 08 (?) 3.3 Sonata was a little misfiring and hesitating when off idle. Sweet, a four-cylinder plug job should be easy, I thought to myself. That is until I heard it run, and I realized I was going to have my share of pain dealing with front-wheel drive V6 spark plugs.
I cleaned the throttle body and changed the spark plugs. The book time is approximately 2.7 hours, which is somewhat absurd. By the time it was all over, I believe it had taken around 1.5 hours.
Manifold plugs are essential components used to seal or block off ports on a manifold, preventing leaks and ensuring the proper functioning of the system. They come in various types and materials, suitable for different applications, including hydraulic systems, pneumatic systems, and fluid control systems.