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Old 04-14-2013, 11:11 AM   #1
jaycanode
Scooby Newbie
 
Member#: 342317
Join Date: Jan 2013
Chapter/Region: RMIC
Location: Paonia, Colorado
Vehicle:
1974 VW Campmobile-E

Default EJ25 in VW Bus Limp Mode?

Spent a long cold winter swapping a 2000 EJ25 from a AT Outback to a 1974 VW Bay Window Bus. VSS from Smallcar, stock ECU and loom. Did everything myself including loom. This car ran great before the swap. Bus fired up first time after swap albeit with some codes and mysterious running issues.

Main issue is what sounds like running in "limp mode". It idles very smooth and steady although once it warms it does "hunt" a bit. When I am sitting still and attempt to rev up, it cuts off at about 2800 rpm and will rev no higher. If I keep accelerator in the same position it will just rythmically go up to 2500-3000rpm and, like fuel is being cut, (or?) its goes back down to 1500. Same behavior rolling on the road. Is this limp/failsafe mode?

Also becomes difficult to start once engine has warmed up.

Codes I get are:

P0336 (Crankshaft Sensor)
P0183 Fuel Temp
P0443 Purge Valve
P1507 Idle Control System Malfunction (Fail Safe) (((This is a Intermittent Code)))))
P1116 Engine Torque Control Cut Signal Circuit Low Input
P1722 Auto Trans Diagnosis Input Signal High Input

Any insight is appreciated. Because I am new to the forum I was relegated to this "Newbie Forum"

Thank for being here!
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Old 04-14-2013, 11:58 AM   #2
jaycanode
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Member#: 342317
Join Date: Jan 2013
Chapter/Region: RMIC
Location: Paonia, Colorado
Vehicle:
1974 VW Campmobile-E

Default

Hey can someone just reply and at least send your condolences? I need 3 replies so I can move this thread to the Normally Aspriated Technical thread. Thanks!
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Old 04-14-2013, 12:12 PM   #3
69subaru360
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Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

The ECU is looking for a signal from the TCU. You need to ground the AT/MT id pin at the ECU.

Fuel temp you need to add in the sensor, it's a little thing that sits on the fuel sending unit.

Idle control be sure it's clean and not sticking and the throttle isn't hanging open a bit.

Purge valve, you'll need to add it in and wire it up even if it doesn't do anything. You might be able to measure the resistance of it and add a resistor in the harness in place of it.

Crank sensor, should be able to just follow the manual to diagnose it.
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Old 04-14-2013, 12:27 PM   #4
jaycanode
Scooby Newbie
 
Member#: 342317
Join Date: Jan 2013
Chapter/Region: RMIC
Location: Paonia, Colorado
Vehicle:
1974 VW Campmobile-E

Default

Thanks for reply 360. After hundreds of hours researching this ECU setup, it seems that pin B26 which is neutral safety switch should be left open and this era ECU does not have an AT/MT pin? Or at least there is not a lead for it. General consensus is there is an AT Ecu and a different model ECU for MT on 2000 EJ25's. (Unlike other years that share UCU's)

Also general consensus is this engine does not need Fuel Temp sensor to run properly. A CEL light maybe but no performance issues.

Will check IAC for cleanliness.

Purge Valve also not needed as I am running W/o Cannister.

Will test Crank Sensor.

Is there any info concerning what exactly limp mode is? Is it different symptoms for each system? Does my case sound like limp mode?

Thanks.
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Old 04-14-2013, 12:32 PM   #5
jaycanode
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Member#: 342317
Join Date: Jan 2013
Chapter/Region: RMIC
Location: Paonia, Colorado
Vehicle:
1974 VW Campmobile-E

Default

Thread moved to normally aspirated......http://forums.nasioc.com/forums/show....php?t=2493360
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Old 04-14-2013, 01:05 PM   #6
HinshawWRX
Medium Frank
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Join Date: Feb 2007
Chapter/Region: MAIC
Location: Common Sense, VA
Vehicle:
2014 Porsche
GT3 (Currently on Fire)

Default

FYI that is cross posting, and against forum rules. If you want a thread moved, report it or pm a mod to do so.
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