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Nissan Exhaust overheating

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New User

Dec 7, 2008, 12:36 PM

Post #1 of 4 (2115 views)
post icon Nissan Exhaust overheating Sign In

I have a 1991 Nissan truck with a 2.4L engine. I recently re-built the engine and replaced the exhaust manifold (cracked) with a Pacesetter header. The exhaust gets extremely hot and the header glows red. I found a leaking fuel line back by the tank and replaced it (thinking that a decrease in fuel pressure/volume was causing the engine to run lean). The fuel line repair did not change the exhaust overheating condition. I plan on borrowing a friends fuel pressure tester and check the fuel pressure. If the fuel pressure checks out ok, how do I go about making the fuel injected engine run less lean?

Veteran / Moderator
way2old profile image

Dec 7, 2008, 12:53 PM

Post #2 of 4 (2111 views)
Re: Nissan Exhaust overheating Sign In

Is the coil output enough to burn all the fuel? If not, the unburned fuel may be re-igniting in the header due to the heat causing the header to glow.

Being way2old is why I need help from younger minds

Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Dec 7, 2008, 4:50 PM

Post #3 of 4 (2108 views)
Re: Nissan Exhaust overheating Sign In

Just a thought; Did the headers come with a port for the O2 sensor?
SW Washington

New User

Dec 8, 2008, 8:22 AM

Post #4 of 4 (2103 views)
Re: Nissan Exhaust overheating Sign In

The header did come with a port for the O2 sensor and EGR tube. A new O2 sensor was installed and the EGR tube was re-connected after the re-build.

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