Lean Misfires at 2700-2800 rpm - Page 54 - 3000GT/Stealth International Message Center

TurboBob · 10-07-2007, 03:30 PM

I have a "BitScope" which might be good for this.

(do a google search....)

B

DoctorDex · 10-09-2007, 09:53 AM

I was digging around under my dash and I found another control unit box, just wondering if anybody knows if there are any caps inside it? I am highly doubtful, this box would cause our problem, but I figured I'd throw it out there.

Part number is: MB629054 "Time & Alarm".

Has anybody deleted this unit? If you don't have factory alarm is it needed?

badass3000 · 10-09-2007, 09:56 AM

where is it?

ProwlerGT · 10-09-2007, 04:31 PM

Give us a picture Dex.... either a real photo or from the CAPs program or service manual. If you look up the ECU you should see this other unit you speak of in the same diagram. If it is the unit perpendicular to the ECU (at least in my 1995 NA ATX) I believe this is the TCU. In your car it could be ECS, ABS (danger danger - don't tamper with it).... or else i dunno. Is there a separate thingy for Active Aero or is that onboard with the ECU?

ProwlerGT · 10-09-2007, 04:39 PM

Dex - Have you deleted the EVAP from your car? or is that called the FP in ya'lls VR4's?

DoctorDex · 10-09-2007, 06:22 PM

Quote:

Originally Posted by badass3000

where is it?

Its under the driver side dash. It located directly up and beside the fuse block. Its more or less behind the vent that is closest to the door. Its about the size of the ECS control unit in the rear. It has the part number: MB629054 printed on the case. I looked it up in caps and all it says is: "Time & Alarm". I've disconnected it just for kicks to see if anything happens. If it doesn't do anything, then I might as well get a rid of it. Weight savings.

Prowler: If you look up the part number in CAPS you should be able to find it. Once you have the part number in your list, click on the part number and then press F2, that should bring you to the part.

With regards to the EVAP, I have deleted it (more or less). It is still functional, but I've done away with the solenoids and canister. Now it just dumps fumes from the tank into the intake pre-MAF while the car is in vacuum. The FP I think your probably referring to is "fuel pump".

brattesani · 10-10-2007, 02:13 PM

if you have an SAFCII try disconnecting it. mine was fried and my car had the same symptoms. the SAFC was working fine and didnt appear to have anything wrong but when i took it out the car was fine.

DoctorDex · 10-11-2007, 09:24 PM

I'll have disconnecting my SAFC-2. I take it temporarily cutting the power wire should work?

With regards to the "time & alarm" control box, I found out what it is. Its the ETACS unit. It seems to control the popup headlights as well the other functions listed here: http://www.3si.org/wiki/index.php/ETACS

I seriously doubt it is in any way related to our problem as I can't see any inputs to the ECU in the manual. However, with that being said, I'm going to pull the unit and revamp any old caps (if there are any).

ProwlerGT · 10-12-2007, 04:40 AM

Quote:

Originally Posted by DoctorDex

With regards to the EVAP, I have deleted it (more or less). It is still functional, but I've done away with the solenoids and canister. Now it just dumps fumes from the tank into the intake pre-MAF while the car is in vacuum. The FP I think your probably referring to is "fuel pump".

Is the thought here that fuel vapor gives your engine "more combustible air"? Any odd affects to having it pre-MAF (MAS)? Whats the point in having the vapors go through the intake anyway? I know this is listed in the emissions section, but I still don't get it. Is this a safety precaution in case the gas tank get too hot or too pressurized?

ProwlerGT · 10-12-2007, 04:41 AM

Quote:

Originally Posted by DoctorDex

I'll have disconnecting my SAFC-2. I take it temporarily cutting the power wire should work?

With regards to the "time & alarm" control box, I found out what it is. Its the ETACS unit. It seems to control the popup headlights as well the other functions listed here: http://www.3si.org/wiki/index.php/ETACS

I seriously doubt it is in any way related to our problem as I can't see any inputs to the ECU in the manual. However, with that being said, I'm going to pull the unit and revamp any old caps (if there are any).

Gotta love those side projects that keep popping up and keeping you from getting to your goal..... although I'd shit a big concrete block if fixing caps in that headlight unit actually does something. lol

10-07-2007, 03:30 PM	#531 (permalink)
TurboBob Resident mad scientist Join Date: Jan 2003 Location: Near Detroit Drives: 86 GN 91 RT/TT Trader Rating: (13)	Re: Lean Misfires at 2700-2800 rpm I have a "BitScope" which might be good for this. (do a google search....) B __________________ Need a datalogger? Check out the Scanmaster 3 PM me about ECU mods for 8000+ RPM rev limits !!!!!!!! Stock = 7300 RPM Stage 1 = 8060 RPM Stage 2 = 8200 RPM Stage 3 = 8400 RPM Stage 4 = 8800 RPM (By request only) 1991 Stealth RT/TT, Grooms Shortblock, 13G's, Translator Pro, www.maftpro.com

10-09-2007, 09:53 AM	#532 (permalink)
DoctorDex Forum Member Join Date: Jul 2005 Location: Edmonton, AB Drives: '91 VR4 Trader Rating: (13)	Re: Lean Misfires at 2700-2800 rpm I was digging around under my dash and I found another control unit box, just wondering if anybody knows if there are any caps inside it? I am highly doubtful, this box would cause our problem, but I figured I'd throw it out there. Part number is: MB629054 "Time & Alarm". Has anybody deleted this unit? If you don't have factory alarm is it needed?

10-09-2007, 09:56 AM	#533 (permalink)
badass3000 Wanted: Traction Problems Join Date: Nov 2002 Location: Jacksonville, Fl Drives: 18 Y.O. "badass" VR4 Trader Rating: (18)	Re: Lean Misfires at 2700-2800 rpm where is it?

10-09-2007, 04:39 PM	#535 (permalink)
ProwlerGT King Detail Join Date: Oct 2003 Location: New Orleans area Drives: 95 3000GT Base DOHC Trader Rating: (9)	Re: Lean Misfires at 2700-2800 rpm Dex - Have you deleted the EVAP from your car? or is that called the FP in ya'lls VR4's?

10-11-2007, 09:24 PM	#538 (permalink)
DoctorDex Forum Member Join Date: Jul 2005 Location: Edmonton, AB Drives: '91 VR4 Trader Rating: (13)	Re: Lean Misfires at 2700-2800 rpm I'll have disconnecting my SAFC-2. I take it temporarily cutting the power wire should work? With regards to the "time & alarm" control box, I found out what it is. Its the ETACS unit. It seems to control the popup headlights as well the other functions listed here: http://www.3si.org/wiki/index.php/ETACS I seriously doubt it is in any way related to our problem as I can't see any inputs to the ECU in the manual. However, with that being said, I'm going to pull the unit and revamp any old caps (if there are any).

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