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GlassVial
Guest
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 Posted:
Thu Oct 27, 2005 6:34 pm Post subject:
OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rough i |
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This car has been driving us crazy. A couple weeks ago the car conked
out, we gave it a full tuneup (pcv plugs wires fuel filter air filter
serp. belt) and it got running again. It started off with 4 codes in
the computer, one of which was the MAP sensor (since replaced) now
we're down to this annoying P1374 code we can't seem to track down,
and we're at the point now where the car has a rough idle/skip and if
you give it some gas then let it return to idle, it'll die (you can
rev it for awhile no problem, as soon as you stop and it goes back to
idle, it just quits). We've replaced the crank sensor and the coolant
temperature sensor as well. The last 2 things we've been told to try
are the ignition control module and the harmonic balancer. If neither
of those 2 things solves it, we're at loss. Any ideas are
appreciated, thanks.
-GV
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Shep
Guest
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| Posted:
Thu Oct 27, 2005 9:05 pm Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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Does this skip/stall at idle affect performance driving at nomal
speed/loads? Is this a constant misfire, or just a rough idle stall,? If so
check the egr for not seating, remove and clean, try running the car with
the connector off. Does this stall happen from the first cold start or only
after it warms up. Have you cleaned the throttle body and iac for carbon
accumulation, check for vacuum leaks especially around the throttle body,
continually replacing parts is not the answer here, the base problem must be
found, it is possible you may have to consider getting this to a pro who is
familiar with these type problems.
"GlassVial" <glassvial@NOSPAM.hotmail.com> wrote in message
news:4el1m1d5mpl2osdj5vcloo9ng6reh5u0at@4ax.com...
| Quote: | This car has been driving us crazy. A couple weeks ago the car conked
out, we gave it a full tuneup (pcv plugs wires fuel filter air filter
serp. belt) and it got running again. It started off with 4 codes in
the computer, one of which was the MAP sensor (since replaced) now
we're down to this annoying P1374 code we can't seem to track down,
and we're at the point now where the car has a rough idle/skip and if
you give it some gas then let it return to idle, it'll die (you can
rev it for awhile no problem, as soon as you stop and it goes back to
idle, it just quits). We've replaced the crank sensor and the coolant
temperature sensor as well. The last 2 things we've been told to try
are the ignition control module and the harmonic balancer. If neither
of those 2 things solves it, we're at loss. Any ideas are
appreciated, thanks.
-GV
|
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Steve Mackie
Guest
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John Horner
Guest
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| Posted:
Thu Oct 27, 2005 11:08 pm Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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GlassVial wrote:
| Quote: | This car has been driving us crazy. A couple weeks ago the car conked
out, we gave it a full tuneup (pcv plugs wires fuel filter air filter
serp. belt) and it got running again. It started off with 4 codes in
the computer, one of which was the MAP sensor (since replaced) now
we're down to this annoying P1374 code we can't seem to track down,
and we're at the point now where the car has a rough idle/skip and if
you give it some gas then let it return to idle, it'll die (you can
rev it for awhile no problem, as soon as you stop and it goes back to
idle, it just quits). We've replaced the crank sensor and the coolant
temperature sensor as well. The last 2 things we've been told to try
are the ignition control module and the harmonic balancer. If neither
of those 2 things solves it, we're at loss. Any ideas are
appreciated, thanks.
-GV
|
Have you checked for a leaking intake manifold gasket? They fail all
the time on the 3.1/3.4 l GM engines and can cause all sorts of weird
problems. Also check carefully for any signs of water in the oil. The
first place it becomes visible is as a milky sludge on the underside of
the oil filler cap.
John |
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Steve Mackie
Guest
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| Posted:
Thu Oct 27, 2005 11:32 pm Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | idle, it just quits). We've replaced the crank sensor and the coolant
temperature sensor as well. The last 2 things we've been told to try
are the ignition control module and the harmonic balancer. If neither
of those 2 things solves it, we're at loss. Any ideas are
appreciated, thanks.
|
You should have started with the Ignition Control Module, but hindsight is
20/20 right?
Steve |
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Shep
Guest
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| Posted:
Fri Oct 28, 2005 1:27 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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Steve, doesn't seem like an ign problem based on his description of the
symptoms, should have some roughness/misfire even off idle, BTW, Alldata has
much better code/component test procedures than Mitchell on demand. The code
certainly points to something going on with the icm or wiring though.
"Steve Mackie" <stevemackie@ns.sympatico.ca> wrote in message
news:F298f.114968$Ph4.3524527@ursa-nb00s0.nbnet.nb.ca...
| Quote: | idle, it just quits). We've replaced the crank sensor and the coolant
temperature sensor as well. The last 2 things we've been told to try
are the ignition control module and the harmonic balancer. If neither
of those 2 things solves it, we're at loss. Any ideas are
appreciated, thanks.
You should have started with the Ignition Control Module, but hindsight is
20/20 right?
Steve
|
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Steve Mackie
Guest
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| Posted:
Fri Oct 28, 2005 1:59 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | symptoms, should have some roughness/misfire even off idle, BTW, Alldata
has
much better code/component test procedures than Mitchell on demand. The
code |
I learned that pretty quick. I also find ALLData easier to navigate.
Steve |
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GlassVial
Guest
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| Posted:
Fri Oct 28, 2005 2:14 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | Does this skip/stall at idle affect performance driving at nomal
speed/loads?
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Driving? What do you mean driving? We can't even drive this thing,
as soon as you take your foot off the gas, it dies :)
| Quote: | Is this a constant misfire, or just a rough idle stall,?
|
Constant, you can definitely hear the skip when you rev the engine.
| Quote: | If so check the egr for not seating, remove and clean, try running the car with
the connector off. Does this stall happen from the first cold start or only
after it warms up.
|
Both. Have not checked EGR yet, thanks for the idea, will add to the
list.
| Quote: | Have you cleaned the throttle body and iac for carbon accumulation, check
for vacuum leaks especially around the throttle body,
continually replacing parts is not the answer here, the base problem must be
found, it is possible you may have to consider getting this to a pro who is
familiar with these type problems.
|
Yes, as part of the tuneup the intake was cleaned out with carb
cleaner. Have not found any vacuum leaks yet. This thing will be
either fixed or going to a pro soon before we rip the rest of our hair
out!! :-)
-GV |
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GlassVial
Guest
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| Posted:
Fri Oct 28, 2005 2:16 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | http://users.eastlink.ca/~smackie/p1374.pdf
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Interesting stuff, thanks.
-GV |
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GlassVial
Guest
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| Posted:
Fri Oct 28, 2005 2:16 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | Have you checked for a leaking intake manifold gasket? They fail all
the time on the 3.1/3.4 l GM engines and can cause all sorts of weird
problems. Also check carefully for any signs of water in the oil. The
first place it becomes visible is as a milky sludge on the underside of
the oil filler cap.
|
Oil is fine, it was just changed, thanks for the idea though.
-GV |
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GlassVial
Guest
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| Posted:
Fri Oct 28, 2005 2:18 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | You should have started with the Ignition Control Module, but hindsight is
20/20 right?
Steve
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Maybe, in our travels with this vehicle thusfar the signs and advice
(from local mechanics and some internet research) have both pointed
to and away from the ICM.
-GV |
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oldkid
Guest
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| Posted:
Fri Oct 28, 2005 8:15 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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gm is absolutely notorius for ICM failures!!just got a 94 cutlass that
supposedly had a bad head gasket and it was THE ICM!!most kinky GM
prolems are ICM or ECM(computer)and dont forget INJECTORS!!get em from
the bone yard,save a buck!!good luck!! |
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oldkid
Guest
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| Posted:
Fri Oct 28, 2005 8:15 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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another thought,fuel contamination?will it run on a direct shot of
spray start? |
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GlassVial
Guest
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| Posted:
Fri Oct 28, 2005 8:15 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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| Quote: | gm is absolutely notorius for ICM failures!!just got a 94 cutlass that
supposedly had a bad head gasket and it was THE ICM!!most kinky GM
prolems are ICM or ECM(computer)and dont forget INJECTORS!!get em from
the bone yard,save a buck!!good luck!!
|
Funny you mention that because the shop around here said that the ICM
rarely goes bad on these cars ;)
One thing I forgot to mention in my original post was that the car has
somewhat of a hard start too, seems to take a lot more cranks than it
should to start, but it does start. I've got another car with the
same motor and it doesn't take anywhere near the amount of cranks this
car does to start.
| Quote: | another thought,fuel contamination?will it run on a direct shot of
spray start?
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Well, it runs regardless once it gets started, it just runs like crap
and it's not actually driveable.
-GV |
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GlassVial
Guest
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| Posted:
Sat Oct 29, 2005 6:56 am Post subject:
Re: OBD-II Code P1374 on a 1996 Olds Cutlass Ciera 3100 (rou |
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Replaced the ICM, runs a little better, still skips, still throws the
1374 code. Anybody care to take a wager on the cam sensor?
-GV |
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