I think my FMU might be failing
06-25-2002, 10:01 AM
#1
H-T Order of Merit
Thread Starter
Join Date: Dec 1999
Location: Sacramento, CA, USA
Posts: 826
Likes: 0
Received 0 Likes
on
0 Posts
I think my FMU might be failing
Twice not my car has started running really rich. The car is in vacuum and even when I barely apply the throttle it goes full rich on my A/F gauge rather then oscillate from rich to lean like it should. After I turned the car off last time it magically fixed itself. I'm hoping that is what happens when I start the car at lunch. What do you guys think?
06-25-2002, 11:02 AM
#3
Honda-Tech Member
Join Date: Mar 2002
Location: aroundtheworld, inaday, usa
Posts: 1,898
Likes: 0
Received 1 Like
on
1 Post
Re: I think my FMU might be failing (mike)
It could be your a/f gauge. Try hooking it up to a good ground source directly to metal and find another power source, a good one is from the fuse box accessory outlet.
06-28-2002, 01:41 PM
#4
H-T Order of Merit
Thread Starter
Join Date: Dec 1999
Location: Sacramento, CA, USA
Posts: 826
Likes: 0
Received 0 Likes
on
0 Posts
Re: I think my FMU might be failing (mike)
It's the FMU. What a piece of garbage. Who wants to sell me a brand new one?
Has anyone seen ben lately?
Has anyone seen ben lately?
06-28-2002, 01:53 PM
#5
Honda-Tech Member
Join Date: Jan 2000
Location: Sacramento, CA
Posts: 14,500
Likes: 0
Received 0 Likes
on
0 Posts
06-28-2002, 02:14 PM
#6
Junior Member
Re: I think my FMU might be failing (dustin)
i have a brand new FMU for sale .. it's from my drag 3 kit.
https://honda-tech.com/zerothread?id=200081
https://honda-tech.com/zerothread?id=200081
06-28-2002, 02:26 PM
#7
What is this crap?
Re: I think my FMU might be failing (mike)
has anyone looked into tearing down the FMU and modifying / cleaning it up so it is less likely to stick? I haven't had time to get into mine...
perhaps regularly cleaning it or something will make it less likely to misbehave.
perhaps regularly cleaning it or something will make it less likely to misbehave.
Trending Topics
06-28-2002, 02:51 PM
#8
Honda-Tech Member
Join Date: Feb 2002
Location: Peoria, IL, USA
Posts: 1,835
Likes: 0
Received 0 Likes
on
0 Posts
Re: I think my FMU might be failing (falconGSR)
I've had mine all the way apart. Vortech says they have to be recalibrated once open, but when you see whats inside, you wont worry about it.
Theres a steel cylinder thats pushed down by the diaphragm and disk. The bigger the disk the more the diaphragm pushes it down. As it travels down it restricts the return line to the tank raising the rail pressure.
If you take it apart you should be able to clean it. The only thing that can go wrong with these is a busted diaphragm or trash keeps the cylinder from moving.
Theres a steel cylinder thats pushed down by the diaphragm and disk. The bigger the disk the more the diaphragm pushes it down. As it travels down it restricts the return line to the tank raising the rail pressure.
If you take it apart you should be able to clean it. The only thing that can go wrong with these is a busted diaphragm or trash keeps the cylinder from moving.
Thread
Thread Starter
Forum
Replies
Last Post