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Old 07-06-2002, 07:29 PM   #1
Ryan23
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Default Car Dead after FMIC Install, please assist

Greetings all, I could use some help. My car won't start after installing an MRT FMIC. It will sputter (and almost run), kinda like a huge vacuum leak. I checked all the obvious clamp connections for the piping and they seem OK. One question I do have, can the MAF sensor be installed backwards, or does it it have a proper direction of flow? I can't get at my car this moment as it's locked up at the Navy Auto Hobby shop (they closed @ 4:30). They are open @ 9am tomorrow, so I'm fishing for suggestions tonight. The MRT FMIC comes with a clamp on unifilter. Could this be screwing with my TXS stage 2 mapped unichip? I'm guessing "No" but I figured I'd ask. Is there an easy way to bypass the Unichip or does the whole TXS harness have to be disconected and the stock ECU plugged back in? Everything else seems OK, I mean, it's just an IC. Thanks for any help.


Ryan
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Old 07-06-2002, 07:53 PM   #2
whiterabbit
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what other mods do you have?
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Old 07-06-2002, 08:30 PM   #3
GDA
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run it without the unichip, it will be fine.

GDA
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Old 07-06-2002, 08:32 PM   #4
EvasionOfTruth
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Ruh Roh....Hope you get it fixed Ryan.

Buster
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Old 07-06-2002, 10:54 PM   #5
JaMa
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Default Re: Car Dead after FMIC Install, please assist

Quote:
Originally posted by Ryan23
Greetings all, I could use some help. My car won't start after installing an MRT FMIC. It will sputter (and almost run), kinda like a huge vacuum leak. I checked all the obvious clamp connections for the piping and they seem OK. One question I do have, can the MAF sensor be installed backwards, or does it it have a proper direction of flow? I can't get at my car this moment as it's locked up at the Navy Auto Hobby shop (they closed @ 4:30). They are open @ 9am tomorrow, so I'm fishing for suggestions tonight. The MRT FMIC comes with a clamp on unifilter. Could this be screwing with my TXS stage 2 mapped unichip? I'm guessing "No" but I figured I'd ask. Is there an easy way to bypass the Unichip or does the whole TXS harness have to be disconected and the stock ECU plugged back in? Everything else seems OK, I mean, it's just an IC. Thanks for any help.


Ryan
Mine did this with the Blitz FMIC as well. It turned out to be too lean - so I ran ity without a unichip until I got a new map and it was fine. Rich as hell from my injectors, but fine.

JaMa
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Old 07-07-2002, 01:44 AM   #6
mr2guru
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I had the exact same symptoms after the injector/turbo install. It turned out to be the reference line for the BOV was disconnected at a T under the IC...missed my visual before startup

I suspect a vaccum leak somewhere or air is leaking in after the MAF
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Old 07-07-2002, 02:04 AM   #7
whiterabbit
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so are you guys saying that with the stock ECU a FMIC bolted on with stock turbo and fuel system will run ?
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Old 07-07-2002, 02:11 AM   #8
wRxbeater11
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I would think the MAF sensor is not on correctly but i could be wrong reason why i think that is b. c when i was installing my cai a while back i didn't put the MAF sensor back on the intake and the car wouldn't even turn over. that's just my guess or just try removing your unichip =]


also how much cutting was needed for the mrt front mount? its a monster of an Intercooler. let us know.

-=Melo
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Old 07-07-2002, 03:08 AM   #9
Jan Shim
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Quote:
Originally posted by whiterabbit
so are you guys saying that with the stock ECU a FMIC bolted on with stock turbo and fuel system will run ?
Yes it will provided the Idle Air Controller/Solenoid has been adjusted to supply MORE air considering now the pipes are so much longer than stock. Not have made this adjustment before on a New Age GDA, I cant tell you where this is located. On the GC8 1998 EJ20 engine it's that beige knob on top of the intake manifold to adjust clockwise or counterwise to suit.

A completely stock WRX running TD04 turbo will suffer from poor throttle response as it (TD04) struggles to pump air to keep the pipes pressurised. It would also be wise to do an ECU reset if such a mod is undertaken. Whether A/F ratio will run lean without a re-map remains to be seen.
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Old 07-07-2002, 07:29 AM   #10
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theres a local guy that runs an SPO fmic on stock ecu and fuel system. The car gets entered into 2-3 events a week (autox, rallyx, and mostly 1/4m drags). I watched it run down the 1/4m track at woodburn all day yesterday and while its not too fast (I think he said his best is 13.6), it would repeat 14s back to back even in the blazing hot sun. By the middle of the day he was only running around 2/10ths slower eventho the temp had climbed around 30f.

Most of the stock tmic wrx's fell on the face much earlier in the day. Using a fmic on a stock turbo might not be the equation for low timeslips, but it surely adds consistency.
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Old 07-07-2002, 11:47 AM   #11
motoxphil
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Ryan,

Double check all of your electrical connections around the install of the FMIC, particularly the MAF. Your "stage 2" unichip carries stock values at cold start up and anything in closed loop mode so this shouldn't be your problem.

Since that intercooler setup significantly leans out the air/fuel ratios across the board, I wouldn't recommend running our "stage 2" mapping. Run your stock ecu only to be safe until you can get it tuned or reprogrammed.

Phil
TurboXS
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Old 07-07-2002, 04:52 PM   #12
OzWRX
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Make sure you havent installed the MAF body backwards..this is possible...

The cable to the MAF should go underneath the aluminium sensor housing and then plug in on the raditor side of the tube....

Also. looking inside the MAF body there is a tapered end..this goes toward the air filter

OzWRX

Last edited by OzWRX; 07-07-2002 at 05:33 PM.
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Old 07-07-2002, 05:10 PM   #13
jmott
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Quote:
Originally posted by mlambert
theres a local guy that runs an SPO fmic on stock ecu and fuel system. The
Most of the stock tmic wrx's fell on the face much earlier in the day. Using a fmic on a stock turbo might not be the equation for low timeslips, but it surely adds consistency.
I could fall on my face with the stock turbo and stock IC and still run 13.9s =)

besides, a bag of ice is cheaper.
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Old 07-07-2002, 06:27 PM   #14
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well, its only other modifications are some sort of boost control, a perrin uppipe and an sti elec locking center diff...and its done mid-high 13's. nothing impressive really for the money spent...but consistent enuff to win bracket races.

it was so hot yesterday that 1.8 60ft times were resulting in sub-100mph runs near 14sec on a heavily modifed vf30 link'd easy sub 13sec wrx
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Old 07-08-2002, 12:18 AM   #15
Ryan23
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Ok, problem solved, the MAF sensor was backwards . She started right up after I swapped it. A couple little annoying things here and there, I'll do a nice big write up for those who are going that route. Yes, the stock turbo is still in place for the curious but this is just a temporary measure. I'm not trying to set any stock turbo records.....$1500 would have gone a lot further if that was my goal. Actually, I have a VF34 arriving soon (Hopefully!) that should compliment this quite well. I am trying to perform one mod at a time to keep troubleshooting easy and since I already had the front mount on hand......

Phil, I have the boost turned down in the interim. As you said previously, closed loop operation is Ok. I've set it @ 14.3 PSI and delta dash reports .76 for A/F sensor #1 @ WOT through 3rd. It actually felt pretty good for only 14 PSI.

Well, I'm tired and going to bed. I'll fill everyone in on the install process tomorrow. It's doable for the average shadetree type, just tedious at times. Take care and thanks for the suggestions!

Ryan
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Old 07-08-2002, 03:13 AM   #16
whitewag
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I had a similar problem when I installed an AEM intake... found out the MAF was backwards
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Old 07-08-2002, 07:39 AM   #17
Twelvz
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Glad to hear you got everything working good Ryan.

Looking foward to your writeup...and checking it out at the next meet
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Old 07-08-2002, 10:13 AM   #18
Conduit
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Quote:
Originally posted by whitewag
I had a similar problem when I installed an AEM intake... found out the MAF was backwards
Out of curiosity, how did you get this backwards on an AEM? It's keyed, and the pipe is one piece...wierd!
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Old 07-08-2002, 10:56 AM   #19
BamBooI
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Quote:
Originally posted by Conduit


Out of curiosity, how did you get this backwards on an AEM? It's keyed, and the pipe is one piece...wierd!
That is true. You cant put it on backwards. Maybe he just meant the wiring?
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Old 07-08-2002, 10:59 AM   #20
Ryan23
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Default Install writeup...this-a-way------>

As promised, here's my writeup on the install process (Good and bad) with the MRT FMIC. It's in the car parts forum:

http://forums.nasioc.com/forums/show...hreadid=211540

Ryan
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Old 07-08-2002, 11:23 AM   #21
Conduit
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I have a deep, gutteral sound I like to make when I do something like this. Try it, you'll like it:
1. Close the mouth tightly
2. Make the following sound as loudly and as obnoxiously as possible. Try to emulate an elephant/bull, "BRRRfffrrrffffffffffffrrffffff"

Repeat as necessary
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