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95turbodel · 04-20-2006, 06:30 AM

hi im running a d16y7 in a 95 civic ex with a t3 turbo, ac autotechnic fuel rail, fmu, and a fuel pump. it bogs out at 4500 to 5000 rpm tryed a 94 lx ecu and it does the samething tryed a p28 ecu samething. what do u think it is?

Turbo&Auto · 04-20-2006, 07:57 AM

Most likely the FMU is making it too rich. Do you have a Wideband O2? That would tell you right away.

preludebuddy · 04-20-2006, 09:59 AM

ditch the fmu and get tuned.

95turbodel · 04-20-2006, 08:08 PM

<div class='quotetop'>QUOTE(Turbo-n-Auto @ Apr 20 2006, 05:57 AM) Quoted post</div><div class='quotemain'>
Most likely the FMU is making it too rich. Do you have a Wideband O2? That would tell you right away.
[/b][/quote]
I dont have a wide band o2 and where do i find one.

Calesta · 04-21-2006, 12:34 AM

Any shop that actually tunes with a dyno should have one.

spydy43 · 04-24-2006, 03:20 PM

FMU can cause your injectors to leak whick makes your car bog down cause its too rich.

Calesta · 04-25-2006, 10:48 PM

<div class='quotetop'>QUOTE(spydy43 @ Apr 24 2006, 02:20 PM) Quoted post</div><div class='quotemain'>
FMU can cause your injectors to leak whick makes your car bog down cause its too rich.
[/b][/quote]

That's only part of it... and they'll only cause your injectors to leak if you're overpressuring them.

Most of the time you really just need a good tune, that's all. Timing is key.

reikoshea · 04-26-2006, 02:49 AM

werd to everything that was said. ditch the FMU. its crap.

nothing compared to a real tune.

spydy43 · 04-26-2006, 04:48 PM

<div class='quotetop'>QUOTE(Calesta @ Apr 25 2006, 10:48 PM) Quoted post</div><div class='quotemain'>
<div class='quotetop'>QUOTE(spydy43 @ Apr 24 2006, 02:20 PM) Quoted post</div><div class='quotemain'>
FMU can cause your injectors to leak whick makes your car bog down cause its too rich.
[/b][/quote]

That's only part of it... and they'll only cause your injectors to leak if you're overpressuring them.

Most of the time you really just need a good tune, that's all. Timing is key.
[/b][/quote]

Doesn't a FMU constantly over pressure the injectors when you are in boost? All I know is shortly after boosting with the FMU in my car the car would bog at low RPMs or when I hit the throttle and I could smell excess fuel because of the injectors leaking.

Calesta · 04-26-2006, 09:27 PM

Yes, it does overpressure while in boost- that's how they work. They're generally not bad for low boost setups that don't make too much power because you're not overstressing the injectors, but for anything with real power expectations, using a RRFPR or FMU is just a bad idea.

04-20-2006, 07:57 AM	#2
Turbo&Auto Nick Go FAST!! Join Date: Jan 2006 Location: East Burg, PA! Age: 28 Posts: 3,271 iTrader: 3 / 100% Ride: 09 Cobalt SS/TC Rep Power: 87	Most likely the FMU is making it too rich. Do you have a Wideband O2? That would tell you right away. __________________ www.BackyardTurbo.com

04-21-2006, 12:34 AM	#5
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 24,525 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 291	Any shop that actually tunes with a dyno should have one. __________________ DO NOT PM me with tech questions! Use the forums! Intercrew Auto Salon - (972) 485-8688

04-25-2006, 10:48 PM	#7
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 24,525 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 291	<div class='quotetop'>QUOTE(spydy43 @ Apr 24 2006, 02:20 PM) Quoted post</div><div class='quotemain'> FMU can cause your injectors to leak whick makes your car bog down cause its too rich. [/b][/quote] That's only part of it... and they'll only cause your injectors to leak if you're overpressuring them. Most of the time you really just need a good tune, that's all. Timing is key. __________________ DO NOT PM me with tech questions! Use the forums! Intercrew Auto Salon - (972) 485-8688

04-26-2006, 09:27 PM	#10
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 24,525 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 291	Yes, it does overpressure while in boost- that's how they work. They're generally not bad for low boost setups that don't make too much power because you're not overstressing the injectors, but for anything with real power expectations, using a RRFPR or FMU is just a bad idea. __________________ DO NOT PM me with tech questions! Use the forums! Intercrew Auto Salon - (972) 485-8688


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04-20-2006, 06:30 AM	#1
95turbodel Junior Member Join Date: Apr 2006 Posts: 4 iTrader: 0 / 0% Rep Power: 0	hi im running a d16y7 in a 95 civic ex with a t3 turbo, ac autotechnic fuel rail, fmu, and a fuel pump. it bogs out at 4500 to 5000 rpm tryed a 94 lx ecu and it does the samething tryed a p28 ecu samething. what do u think it is?

04-20-2006, 09:59 AM	#3
preludebuddy Senior Member Join Date: Mar 2004 Location: putting the rad in colorado Posts: 372 iTrader: 0 / 0% Rep Power: 15	ditch the fmu and get tuned.

04-20-2006, 08:08 PM	#4
95turbodel Junior Member Join Date: Apr 2006 Posts: 4 iTrader: 0 / 0% Rep Power: 0	<div class='quotetop'>QUOTE(Turbo-n-Auto @ Apr 20 2006, 05:57 AM) Quoted post</div><div class='quotemain'> Most likely the FMU is making it too rich. Do you have a Wideband O2? That would tell you right away. [/b][/quote] I dont have a wide band o2 and where do i find one.

04-24-2006, 03:20 PM	#6
spydy43 Senior Member Join Date: May 2004 Posts: 176 iTrader: 0 / 0% Rep Power: 13	FMU can cause your injectors to leak whick makes your car bog down cause its too rich.

04-26-2006, 04:48 PM	#9
spydy43 Senior Member Join Date: May 2004 Posts: 176 iTrader: 0 / 0% Rep Power: 13	<div class='quotetop'>QUOTE(Calesta @ Apr 25 2006, 10:48 PM) Quoted post</div><div class='quotemain'> <div class='quotetop'>QUOTE(spydy43 @ Apr 24 2006, 02:20 PM) Quoted post</div><div class='quotemain'> FMU can cause your injectors to leak whick makes your car bog down cause its too rich. [/b][/quote] That's only part of it... and they'll only cause your injectors to leak if you're overpressuring them. Most of the time you really just need a good tune, that's all. Timing is key. [/b][/quote] Doesn't a FMU constantly over pressure the injectors when you are in boost? All I know is shortly after boosting with the FMU in my car the car would bog at low RPMs or when I hit the throttle and I could smell excess fuel because of the injectors leaking.

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