I have a 1989 U12 2.4l Nissan Pintara. It started running really rough one day and when I got home the exhaust manifold was glowing red hot. I changed the catalytic converter and it still is running like it was before I changed it, any suggestions please?

I have not been brave enough to drive it long enough to see if exhaust glows red again, but i am pretty sure it will as i only drove it around a couple of streets and it was pretty hot under the hood then.

  • You are saying the engine is still running rough, but the manifold is no longer glowing red, or is it? – Pᴀᴜʟsᴛᴇʀ2 Mar 3 '14 at 14:18

Other than a lean fuel mix, you may also have a valve train problem - if the exhaust valves are opening too soon or never closing correctly, it'd dump still-burning exhaust into the exhaust manifold. It'd run very poorly and may get your exhaust manifold hot enough to glow.


Sounds like it is running lean, which leads to increased exhaust temperatures. Check the fuel pressure and that the injectors are flowing properly.

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