AEM Ultimate Resource Thread>>>> - Page 96 - 3000GT/Stealth International Message Center

VR-4ever · 11-19-2005, 05:16 PM

Quote:

Originally Posted by mehlosTT

Ist gen car: The aem ems is pulling the tach signal direct from the harness, just as the oem ecu would do.

So you "T" off the signal line to the ems to your tach?

Quote:

Originally Posted by xwire

tach signal pulled from MSD DIS tach out put

I do not have a MSD DIS. My ignition system is using a hks dli.

Thank you both for your replies... does anyone else have a solution to the tach issue?

1veryfastvr4 · 11-19-2005, 08:42 PM

yea just checked the settings they are all right, so now im stumped?

BAdAzZV8 · 11-20-2005, 06:03 AM

Quote:

Originally Posted by VR-4ever

So you "T" off the signal line to the ems to your tach?

I do not have a MSD DIS. My ignition system is using a hks dli.

Thank you both for your replies... does anyone else have a solution to the tach issue?

There is no wire splicing involved. When you plug in your AEM, as far as the tach is concerned, it is the stock ECU.

VR-4ever · 11-20-2005, 07:59 AM

So I am pulling the tach signal from an output of the aem to the cluster. I will have to track down which wire this is on the harness.

The reason I am asking, is because I have an aftermarket tach.

Thanks for the information, BAdazZV8. =)

FWombat · 11-23-2005, 10:53 AM

Quote:

Originally Posted by VR-4ever

So I am pulling the tach signal from an output of the aem to the cluster. I will have to track down which wire this is on the harness.

Nope, that's not quite right. The stock tach signal doesn't come from the ECU at all. The tach signal comes from the PTU - that little box in the engine bay under the ignition coils.

Antwan3000 · 12-06-2005, 06:50 AM

how does the AEM EMS guage and control boost levels?..

i'm curious because i've had boost issues in the past and i'm not sure whether or not the EMS will solve the problem..

basically, after i did the "free boost mod" on my car i eventually couldnt get any more than 7~ psi (according to my guage.. which is just the Blitz turbo timer/boost gauge combo).. this led me to believe that my boost solnoid went bad so i decided to "bypass" it and install a MBC.. i installed a Hallman Pro and (according to my guage) i'm now overboosting..

both the turbo timer/guage and MBC are hooked up correctly.. so either i have a defective MBC (which i doubt), a bad boost solnoid (which is very possible), or my current boost guage is inaccurate (which i doubt but is probable)..

so my concern is exactly how does the AEM control boost and how does it guage boost.. i'll be installing the full AEM system later this week and i have the AEM universal EMS guages aswell..

i'm also going to uninstall the MBC and return the car to a stock set-up before the AEM is installed.. so depending on how my boost is acting when i return it to stock should give me a better idea on what's not working correctly.. i just wanted to get a heads-up on how the AEM may or may not solve my issue..

lethal_vr4 · 12-06-2005, 07:03 AM

Personally, I would look for vacum leaks on your wastegate lines first if you are overboosting with your MBC.

Antwan3000 · 12-06-2005, 07:15 AM

Quote:

Originally Posted by lethal_vr4

Personally, I would look for vacum leaks on your wastegate lines first if you are overboosting with your MBC.

i hadn't pressure tested the system or anything but the lines certainly look to be in good condition and working order..

i'll have a better idea once i uninstall the MBC and return it back to stock.. if i start back underboosting, then i figure its safe to say its a bad solenoid..

it doesnt really matter now tho.. i did some more searching on the site and i found that the AEM uses the boost solenoid to control boost and some folks think its best to get an aftermarket boost solenoid to better allow the AEM to control boost..

so it looks like buying an aftermarket boost solenoid is my next move before i install the AEM.. any suggestions on brand/type?.. in my research i saw mention of an Apexi aftermarket boost solenoid working well with the AEM..

also, i've read that installing an EBC can solve the underboosting issues of a defecting boost solenoid.. is this still true with the AEM EMS?.. it doesnt seem accurate since i've read that the AEM uses the solenoid to control boost..

lethal_vr4 · 12-06-2005, 07:26 AM

I reallly think you are debugging your overboost/underboost problem the wrong way... there are easier ways of determining the root cause of your problem with out all this swapping in and out of boost controlers. PM me if you want more details, as this it is not really relavant to this thread.

Antwan3000 · 12-06-2005, 07:34 AM

cool.. thanks..

11-19-2005, 08:42 PM	#952 (permalink)
1veryfastvr4 TPW: Promoter Join Date: Jan 2005 Location: boring ohio Drives: 97 vr4 Trader Rating: (58)	Re: AEM Ultimate Resource Thread>>>> yea just checked the settings they are all right, so now im stumped?

11-20-2005, 07:59 AM	#954 (permalink)
VR-4ever work eat college sleep... Join Date: May 2002 Location: va beach. Trader Rating: (12)	Re: AEM Ultimate Resource Thread>>>> So I am pulling the tach signal from an output of the aem to the cluster. I will have to track down which wire this is on the harness. The reason I am asking, is because I have an aftermarket tach. Thanks for the information, BAdazZV8. =)

12-06-2005, 06:50 AM	#956 (permalink)
Antwan3000 aka "3000" Join Date: Nov 2004 Location: Memphis, TN Drives: '92 Stealth R/T TT Trader Rating: (1)	Re: AEM Ultimate Resource Thread>>>> how does the AEM EMS guage and control boost levels?.. i'm curious because i've had boost issues in the past and i'm not sure whether or not the EMS will solve the problem.. basically, after i did the "free boost mod" on my car i eventually couldnt get any more than 7~ psi (according to my guage.. which is just the Blitz turbo timer/boost gauge combo).. this led me to believe that my boost solnoid went bad so i decided to "bypass" it and install a MBC.. i installed a Hallman Pro and (according to my guage) i'm now overboosting.. both the turbo timer/guage and MBC are hooked up correctly.. so either i have a defective MBC (which i doubt), a bad boost solnoid (which is very possible), or my current boost guage is inaccurate (which i doubt but is probable).. so my concern is exactly how does the AEM control boost and how does it guage boost.. i'll be installing the full AEM system later this week and i have the AEM universal EMS guages aswell.. i'm also going to uninstall the MBC and return the car to a stock set-up before the AEM is installed.. so depending on how my boost is acting when i return it to stock should give me a better idea on what's not working correctly.. i just wanted to get a heads-up on how the AEM may or may not solve my issue.. __________________ 1992 Dodge Stealth R/T Twin Turbo Current Mods- Intake: Dejon Tool dual intake pipes (no MAF), DNP FMIC and hardpipes, TurboXS Type H-RFL BOV, krank vents Exhaust: 3SX custom DP, Random Technology UHF cat, Borla catback exhaust Wheels and Tires/Drivetrain:18" Volk Racing TE-37s (white), Kumho Ecsta Supra 712s, SPEC Stage III+ clutch, stainless steel clutch slave line, Fidanza lightweight flywheel, PST 1-piece CFDS, Ultimate Performance short-throw shifter Ignition: NGK plugs, Magnecor KV85 8.5mm wires, Optima Redtop Fuel: Denso 720ccs, hotwired Denso supra fuel pump, AEM adjustable FPR Control: Greddy Emanage Ultimate, AEM UEGO WB O2s, AEM TRU-BOOST controller, Blitz DTT DCII Cosmetics: viper blue pearl metallic paint with custom viper white racing stripes, Cianci fiberglass triple-guage pod, AEM WB O2 gauge, AEM TRU-BOOST gauge, AEM oil pressure gauge, black/blue interior design, Corbeau CR-1 racing seats and belts, Momo steering wheel, Momo shift knob, Momo shifter boot, Momo racing pedals, Blue StreetGlows Sound: all Sony Xplod speakers with two 10" Xplod subs in a custom box Next Mod(s): Phantom turbos, DNP precats, 3SX lightweight crankpully, NX kit..

12-06-2005, 07:03 AM	#957 (permalink)
lethal_vr4 NG '03 6th Floor Crew Join Date: Oct 2001 Drives: 92 VR4/ 01 Lightning Trader Rating: (58)	Re: AEM Ultimate Resource Thread>>>> Personally, I would look for vacum leaks on your wastegate lines first if you are overboosting with your MBC. __________________ Web log: http://apps.blackflagracing.com/Blog/ The Armada '93 Sandstone Gray 3000GT VR-4 2006 3SI Ride of the Year 2007 All Mitsu Cookout, 1st Place 1st Gen 3/S 2008 All Mitsu Cookout, 1st Place 1st Gen 3/S '92 Fiji Blue 3000GT VR-4 2004 All Mitsu Cookout, 1st Place 1st Gen 3/S 2005 NG Quick 8 AWD Unlimited 1/4 Mile Qualifier. BLACK FLAG RACING '92 Emerald Green Pearl Stealth RT/TT 3.5L, 15Gs, AEM EMS For Sale

12-06-2005, 07:26 AM	#959 (permalink)
lethal_vr4 NG '03 6th Floor Crew Join Date: Oct 2001 Drives: 92 VR4/ 01 Lightning Trader Rating: (58)	Re: AEM Ultimate Resource Thread>>>> I reallly think you are debugging your overboost/underboost problem the wrong way... there are easier ways of determining the root cause of your problem with out all this swapping in and out of boost controlers. PM me if you want more details, as this it is not really relavant to this thread.

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12-06-2005, 07:34 AM	#960 (permalink)
Antwan3000 aka "3000" Join Date: Nov 2004 Location: Memphis, TN Drives: '92 Stealth R/T TT Trader Rating: (1)	Re: AEM Ultimate Resource Thread>>>> cool.. thanks..