Hi, Can anyone give some advice here. I have a Fuel Fail 37, I have changed
out the EGR Solenoid, the EGR Valve, and the EGR air temp sensor. What else
can I try before resorting to a main dealer for a full JDS checkout? This is
on the 91 XJ40.
Thanks Mike.
91 XJ40 90K
93 XJ40 97K
Mike,
The 37 code is for the CPU seeing and open or short circuit to the
egr vacuum solenoid.
This has nothing to do with the egr valve itself(vacuum operated),
that would give you a code 39.
So if the CPU thinks the egr solenoid is open or shorted electrically,
its the…
egr vacuum solenoid(blue bit, rear of engine)
The connector to the egr vacuum solenoid,
The wires to the egr vacuum solenoid,
the connection on the engine CPU to the egr vacuum solenoid.
Or the CPU itself.
You replaced the egr vacuum solenoid and reset the computer by lifting
the battery terminal???
The egr vacuum solenoid connector should have 12 volts and ground when
the egr system is in operation, and I am not sure what it has when
its not in operation, ground with switched 12 volts, or 12 volts with
switched ground…I should carry my books around!
You should not be able to test it working, as it only works on the
hiway I think…not at idle, or in park.
What is the resistance of the egr vacuum solenoid?
It should be the same(roughly) as the air injection solenoid at the
front of the engine(same part).
I would GUESS something like 50 ohms? would be normal…
Its a very simple fault code, is 37…its electrically open, or shorted
as far as the engine CPU sees…and there are only 2 wires…12 volts
and ground.
Brett
1990 XJ6
…Date: Tue, 28 Sep 1999 12:24:53 -0500
From: The Wedges mwedge@texas.net
Subject: [modern] Fuel Fail 37
Sender: owner-modern@jag-lovers.org
To: “‘ModernJag’” modern@jag-lovers.org
Hi, Can anyone give some advice here. I have a Fuel Fail 37, I have changed
out the EGR Solenoid, the EGR Valve, and the EGR air temp sensor. What else
can I try before resorting to a main dealer for a full JDS checkout? This is
on the 91 XJ40.
Thanks Mike.
91 XJ40 90K
93 XJ40 97K
Shelley,
As Jim Reminga just pointed out, you need to disconnect the battery for a
few seconds to clear this code, otherwise you can have fixed the problem
and the code will still be there.
Dave
David Hurlston
ViaData LP
Another Query about this :
I got a fuel fail 44 a few months back, I know what caused it (inlet
manifold probs), but I have never reset it. The ‘check eng’ light is still
illuminated when I turn the key, and I can press the VCM and get the FF 44
error shown. OK. but…
If my engine does ‘something’ to cause another FF44, will the check engine
light come one whilst driving. What I mean in, would I need to reset it
before I was alerted to any new FF 44’s ?
Patrick–
Shelley,
As Jim Reminga just pointed out, you need to disconnect the battery for a
few seconds to clear this code, otherwise you can have fixed the problem
and the code will still be there.Dave
David Hurlston
ViaData LP
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Patrick,
I am not sure about this, and the Jaguar diagnostic book gives
no info, but on most cars, a fault will clear after so many key cycles,
or if the fault clears, depending on what the fault was.
An ACTIVE fault will light the check engine light, while the non active
dtc,s will be stored in the ECU.
I know when I had the fuel fail 26, it would clear every time the engine
was restarted, and come back or not depending…
Not sure what codes will self clear, and what ones wont, but suspect
since my 26 self cleared, a 44 should also…
(both are mixture related codes)
There may also be differences between years…
Brett
1990 XJ6
…Date: Thu, 10 Aug 2000 13:36:23 +0000 (GMT)
From: Patrick Tochel lazaroonie@hotmail.com
Subject: Re: [modern] Fuel Fail 37
Sender: owner-modern@jag-lovers.org
To: modern@jag-lovers.org
Another Query about this :
I got a fuel fail 44 a few months back, I know what caused it (inlet
manifold probs), but I have never reset it. The ‘check eng’ light is still
illuminated when I turn the key, and I can press the VCM and get the FF 44
error shown. OK. but…
If my engine does ‘something’ to cause another FF44, will the check engine
light come one whilst driving. What I mean in, would I need to reset it
before I was alerted to any new FF 44’s ?
Patrick
Shelley,
As Jim Reminga just pointed out, you need to disconnect the battery for a
few seconds to clear this code, otherwise you can have fixed the problem
and the code will still be there.Dave
David Hurlston
ViaData LP
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Patrick,
I am not sure about this, and the Jaguar diagnostic book gives
no info, but on most cars, a fault will clear after so many key cycles,
or if the fault clears, depending on what the fault was.
An ACTIVE fault will light the check engine light, while the non active
dtc,s will be stored in the ECU.
Just to clarify my (simple) understanding of it, there are two different
circumstances under which the ‘check eng’ light will be shown.
-
Driving along, and a problem occurrs, the ‘check eng’ light will come on.
-
Car stopped, turn key once, and the ‘check eng’ light comes on, and
doesn’t go off. At this point you can press the vcm, to get the code.
I know when I had the fuel fail 26, it would clear every time the engine
was restarted, and come back or not depending…
the Haynes book says that on pre 1990 cars, driving above 18 mph will reset
it (I also believe there was some recent discussion about this), but on cars
after this, you need to disconnect the battery.
Not sure what codes will self clear, and what ones wont, but suspect
since my 26 self cleared, a 44 should also…
(both are mixture related codes)There may also be differences between years…
It would appear that it definitely won’t self clear on newer cars. My worry
is that because it has been stored in the ECU, and still is, that any
re-occurance of FF 44 , will not cause the warning light to come on whilst
driving, meaning that my problem might be much worse than I expect. In basic
logi terms, something like this :
loop while driving :
problem with engine.
get diagnostic code.
is diagnostic code currently stored as problem ?
if yes then do not light ‘check eng’
else light ‘check eng’
end.
I find it crazy that all the techonology is there to store and report these
codes, but they wont reset themselves without unhooking the battery. And
since I don’t have the radio code…
Patrick–
1993 XJ6 3.2s
Brett
1990 XJ6
…Date: Thu, 10 Aug 2000 13:36:23 +0000 (GMT)
From: Patrick Tochel <@Patrick_Tochel>
Subject: Re: [modern] Fuel Fail 37
Sender: owner-modern@jag-lovers.org
To: modern@jag-lovers.orgAnother Query about this :
I got a fuel fail 44 a few months back, I know what caused it (inlet
manifold probs), but I have never reset it. The ‘check eng’ light is still
illuminated when I turn the key, and I can press the VCM and get the FF 44
error shown. OK. but…If my engine does ‘something’ to cause another FF44, will the check engine
light come one whilst driving. What I mean in, would I need to reset it
before I was alerted to any new FF 44’s ?Patrick
Shelley,
As Jim Reminga just pointed out, you need to disconnect the battery for a
few seconds to clear this code, otherwise you can have fixed the problem
and the code will still be there.Dave
David Hurlston
ViaData LP
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
If you disconnect the power to just the ECU will it clear the code (fuses or
connector)?----- Original Message -----
From: “Patrick Tochel” lazaroonie@hotmail.com
To: modern@jag-lovers.org
Sent: Thursday, August 10, 2000 10:46 AM
Subject: Re: [modern] Fuel Fail 37
Patrick,
I am not sure about this, and the Jaguar diagnostic book gives
no info, but on most cars, a fault will clear after so many key cycles,
or if the fault clears, depending on what the fault was.
An ACTIVE fault will light the check engine light, while the non active
dtc,s will be stored in the ECU.
Just to clarify my (simple) understanding of it, there are two different
circumstances under which the ‘check eng’ light will be shown.
-
Driving along, and a problem occurrs, the ‘check eng’ light will come on.
-
Car stopped, turn key once, and the ‘check eng’ light comes on, and
doesn’t go off. At this point you can press the vcm, to get the code.
I know when I had the fuel fail 26, it would clear every time the engine
was restarted, and come back or not depending…
the Haynes book says that on pre 1990 cars, driving above 18 mph will reset
it (I also believe there was some recent discussion about this), but on cars
after this, you need to disconnect the battery.
Not sure what codes will self clear, and what ones wont, but suspect
since my 26 self cleared, a 44 should also…
(both are mixture related codes)There may also be differences between years…
It would appear that it definitely won’t self clear on newer cars. My worry
is that because it has been stored in the ECU, and still is, that any
re-occurance of FF 44 , will not cause the warning light to come on whilst
driving, meaning that my problem might be much worse than I expect. In basic
logi terms, something like this :
loop while driving :
problem with engine.
get diagnostic code.
is diagnostic code currently stored as problem ?
if yes then do not light ‘check eng’
else light ‘check eng’
end.
I find it crazy that all the techonology is there to store and report these
codes, but they wont reset themselves without unhooking the battery. And
since I don’t have the radio code…
Patrick
1993 XJ6 3.2s
Brett
1990 XJ6
…Date: Thu, 10 Aug 2000 13:36:23 +0000 (GMT)
From: Patrick Tochel lazaroonie@hotmail.com
Subject: Re: [modern] Fuel Fail 37
Sender: owner-modern@jag-lovers.org
To: modern@jag-lovers.orgAnother Query about this :
I got a fuel fail 44 a few months back, I know what caused it (inlet
manifold probs), but I have never reset it. The ‘check eng’ light is still
illuminated when I turn the key, and I can press the VCM and get the FF 44
error shown. OK. but…If my engine does ‘something’ to cause another FF44, will the check engine
light come one whilst driving. What I mean in, would I need to reset it
before I was alerted to any new FF 44’s ?Patrick
Shelley,
As Jim Reminga just pointed out, you need to disconnect the battery for a
few seconds to clear this code, otherwise you can have fixed the problem
and the code will still be there.Dave
David Hurlston
ViaData LP
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
Hello All;
I just had a Fuel Fail 23…running too rich according to the oxy sensor. My
mechanic told me how to clear the code, easily.
Look in the center console fuse box for the “Instrument Pack” fuse. It’s
#9, second closest to the driver’s seat on LHD cars. With the key turned to
II, remove the fuse for 30 seconds or so. Replace the fuse. The code will
be gone.
This was a one minute job. Saves disconnecting the battery and the
subsequent re-coding of the radio.
I’m not sure if this is technique and location of fuses is exclusive to the
94 XJ40.
Paul H. Lively,
94 VDP 38000 miles
Works on my '92. Note position of needles when you pull the fuse. They will
drop. Wait a few seconds and they will drop again. That’s when the VCM
resets. My $.02.
Dick Pearson
Ex 53 XK-120 DHC
92 XJ-40 LEAPURR
Leesburg, FL USA
If the automobile had followed the same development cycle as the computer,
a Jaguar today would cost $100, get a million miles to the gallon,
and explode once a year, killing everyone inside.----- Original Message -----
From: Paulphin@aol.com
To: lazaroonie@hotmail.com; modern@jag-lovers.org
Sent: Thursday, August 10, 2000 6:31 PM
Subject: Re: [modern] Fuel Fail 37
Hello All;
I just had a Fuel Fail 23…running too rich according to the oxy sensor.
My
mechanic told me how to clear the code, easily.Look in the center console fuse box for the “Instrument Pack” fuse.
It’s
#9, second closest to the driver’s seat on LHD cars. With the key turned
to
II, remove the fuse for 30 seconds or so. Replace the fuse. The code
will
be gone.This was a one minute job. Saves disconnecting the battery and the
subsequent re-coding of the radio.I’m not sure if this is technique and location of fuses is exclusive to
the
94 XJ40.Paul H. Lively,
94 VDP 38000 miles
Paul,
What was the cause of the fuel fail 23?
The mixture related codes are the biggest pain in the butt to
figure out…
Brett
1990 XJ6
…Date: Thu, 10 Aug 2000 18:31:18 -0400 (EDT)
From: Paulphin@aol.com
Subject: Re: [modern] Fuel Fail 37
Sender: owner-modern@jag-lovers.org
To: lazaroonie@hotmail.com, modern@jag-lovers.org
Hello All;
I just had a Fuel Fail 23…running too rich according to the oxy sensor. My
mechanic told me how to clear the code, easily.
Look in the center console fuse box for the “Instrument Pack” fuse. It’s
#9, second closest to the driver’s seat on LHD cars. With the key turned to
II, remove the fuse for 30 seconds or so. Replace the fuse. The code will
be gone.
This was a one minute job. Saves disconnecting the battery and the
subsequent re-coding of the radio.
I’m not sure if this is technique and location of fuses is exclusive to the
94 XJ40.
Paul H. Lively,
94 VDP 38000 miles
My mechanic with KH Automotive here in Kansas City tells me it’s most likely
an injector that was releasing too much fuel or a faulty oxygen sensor. I’ll
take the plugs out this weekend and see if any show signs of fouling. The
car runs perfectly and the code hasn’t shown up for two weeks. Fuel
consumption is consistent with before the fault code. NOTHING in the archive
on Fuel Fail 23.
Paul H. Lively
94 VDP
You need to be more creative in your search scripts - there is plenty in the
archives on fuel fail 23 codes - I have the same problem - you got a missing
wire, plug, bad/interrmittant injector, bad o2 sensor, or defective fuel
rail fuel pressure regulator - to much pressure at small throttle positions
…
REM - Seattle----- Original Message -----
From: Paulphin@aol.com
To: Brett.Gazdzinski@wcom.com; modern@jag-lovers.org
Sent: Thursday, August 10, 2000 8:00 PM
Subject: Re: [modern] Fuel Fail 37
My mechanic with KH Automotive here in Kansas City tells me it’s most
likely
an injector that was releasing too much fuel or a faulty oxygen sensor.
I’ll
take the plugs out this weekend and see if any show signs of fouling. The
car runs perfectly and the code hasn’t shown up for two weeks. Fuel
consumption is consistent with before the fault code. NOTHING in the
archive
on Fuel Fail 23.Paul H. Lively
94 VDP
I’m getting a Fuel Fail 37 on my '92 Sovereign. The manual says it’s
related to the EGR Gas Temperature Sensor. I’ve reset it and it has come
back on again. Is this telling me that I need to replace the sensor? Will
it harm the car to drive it until I can get it fixed? If so, does anyone out
there have any experience with this procedure for a medium level DIYer?
Also, any sources for the sensor and the cost?
Thanks,
Jeff
Tulsa, OK
Jeff,
No that is all wrong.
FF39 is the temp sensor code.
You get FF39 when the port plugs up…needs to be cleaned
along with the throttle…
FF 37 is for an electrical problem to the egr solenoid.
ECU sees open or short to the solenoid.
The egr solenoid is on the rear of the engine, and has
a hose running to the egr valve.
It gets 12 volts to open or close the solenoid to let vacuum
to the actual egr valve.
They can go bad (the blue solenoid) or just have a dirty
connection (wd40!)
The solenoid should measure 37 to 44 ohms roughly.
A low battery can also set this code, along with many others…
Brett
1990 XJ6>
I’m getting a Fuel Fail 37 on my '92 Sovereign. The manual says it’s
related to the EGR Gas Temperature Sensor. I’ve reset it and
it has come
back on again. Is this telling me that I need to replace the
sensor? Will
it harm the car to drive it until I can get it fixed? If so,
does anyone out
there have any experience with this procedure for a medium
level DIYer?
Also, any sources for the sensor and the cost?
Thanks,
Jeff
Tulsa, OK
Hey Folks,
I’ve been suffering from a Fuel Fail 37 on my '92 Sovereign. My mechanic
diagnosed it as a bad EGR valve and replaced it. Within 20 miles, the
warning light and FF 37 came back on. Anyone got any ideas?
Thanks,
Jeff
Jeff,
I get fuel fail 37 every so often. It says EGR relay not EGR valve in my
manual. Mostly it maybe a sticky contact or a condition where there is an
over rich moment and it is triggered by the oxy sensor (at least that is my
guess). I usually just disconnect the battery to reset it and never see it
again for 5-6 months. I suppose I have a dirty hose or passage some place
and this summer I am going to clean the fuel system and EGR piping. I
replaced the EGR valve the first time it happened but not since them. I
think I paid $37 for the valve and the fault light was back on in a week. I
have had the problem since I cleaned all my fuel injector electrical contacts
and lube with conductive grease. Its like the lamp out light that flickers
on an off but I never have any lights out (except the headlight which doesn’t
trigger the warning light -go figger
Jay 90 Majestic
Jay 90 Majestic
jagman@wans.net wrote:> Hey Folks,
I’ve been suffering from a Fuel Fail 37 on my '92 Sovereign. My mechanic
diagnosed it as a bad EGR valve and replaced it. Within 20 miles, the
warning light and FF 37 came back on. Anyone got any ideas?
Thanks,
Jeff
Jeff wrote:
I’ve been suffering from a Fuel Fail 37 on my '92 Sovereign. My mechanic
diagnosed it as a bad EGR valve and replaced it. Within 20 miles, the
warning light and FF 37 came back on. Anyone got any ideas?
Fuel fail 37 is a fault in the solenoid circuit that controls vacuum to the
EGR valve, not the EGR valve itself not the temperature sensor circuitry in
the intake manifold. The solenoid valve is a red cylinder near the rear of
the intake manifold, connected to two wires and two vacuum hoses. Disconnect
the electrical connector in the circuit, clean it and reconnect and your
problem will most likely be solved. If not, inspect the wiring for shorts,
and measure the solenoid valve for continuity. You may need to reset the
VCM to eliminate the warning.
Reset the VCM by turning the ignition on without starting the car. In the
center (glove box) fuse panel, pull the instrument panel fuse and wait until
the speedo and tach needles fall to zero. Reinsert the fuse and start the
car.
Dave Lokensgard
'90 Vanden Plas Majestic (DAVZCAT)
'55 XK140 OTS
Poway, California
Jeff,
Get a new mechanic, and a new egr solenoid.
Code 37 is for the ELECTRICAL operation of the
vacuum solenoid that supplies vacuum to open the actual egr valve.
Its a blue thing on the rear of the engine with two vacuum lines on it.
One goes to the intake manifold (vacuum), the other runs to the
egr valve.
The 37 code is for the ECU seeing the electrical circuit
open or shorted.
Most often its a dirty connection at the solenoid, but they
can fail and go erratic…
Brett
1990 XJ6>
Hey Folks,
I’ve been suffering from a Fuel Fail 37 on my '92 Sovereign.
My mechanic
diagnosed it as a bad EGR valve and replaced it. Within 20 miles, the
warning light and FF 37 came back on. Anyone got any ideas?
Thanks,
Jeff