Installed Mag Manifold, No more UDP CEL..?

gilly02le · Post by **gilly02le** » Wed Mar 19, 2008 4:05 pm

So i installed the magnum intake manifold i bought a while back, after giving it a nice port and polish. I Made the inlet as big as possible, something like 54.5mm. Anyways, it works great, and i definitely feel a difference with it on there, and i still haven't wired up the secondaries to my digital window switch. Anyways i just thought id add a wierd finding of mine, I have an obx UDP on my car, and it used to made the CEL blink after 5500 rpm indicating a non-existant misfire. There are many ppl with this same problem. Well it's been three weeks now, and i have yet to make the CEL come on like it used too. I'm pretty happy about it, not that it really bugged me that much, but hey, i figured i'd share my findings with everyone. I have a bunch of pics of the ported manifold if anyone wants ill post em up!

kevo · Post by **kevo** » Wed Mar 19, 2008 4:51 pm

I have been working on a custom throttle body and have been meaning to port my intake. I would appreciate it greatly if you post those pics!

NickKo · Post by **NickKo** » Wed Mar 19, 2008 11:59 pm

gilly02le wrote:So i installed the magnum intake manifold i bought a while back
Anyways i just thought id add a wierd finding of mine, I have an obx UDP on my car, and it used to made the CEL blink after 5500 rpm indicating a non-existant misfire. There are many ppl with this same problem. Well it's been three weeks now, and i have yet to make the CEL come on like it used too. I'm pretty happy about it, not that it really bugged me that much, but hey, i figured i'd share my findings with everyone.

WEIRD.

Actually, that is GOOD news ....

That 'UDP' misfire code is a long-time ongoing problem for the 2002's.
It's strange that you somehow 'accidentally' fixed it somehow ??

I wonder how changing the manifold would 'fix' the misfire code ??

-Nick

ZeroChad · Post by **ZeroChad** » Thu Mar 20, 2008 12:20 pm

You'll wanna hook the secondaries up as soon as you can. Check out this dyno chart showing always open and always closed secondaries. I think they said at the end of the closed they opened them up just to verify. You should be seeing something like the red curve right now.

fixitmattman · Post by **fixitmattman** » Thu Mar 20, 2008 2:08 pm

fdasfdafda
fdasfd
fda

I've not had mine hooked up since I installed it two years ago.

This summer they're getting hooked up though. Finally got off my ass and bought a window switch

kc2005ptgt · Post by **kc2005ptgt** » Fri Mar 21, 2008 3:55 pm

wow, so the difference is 20hp/16trq??? what kind of car was it on?

ZeroChad · Post by **ZeroChad** » Fri Mar 21, 2008 7:49 pm

I grabbed it from this thread. LINK

2GN.ORG

Installed Mag Manifold, No more UDP CEL..?

Installed Mag Manifold, No more UDP CEL..?

Re: Installed Mag Manifold, No more UDP CEL..?