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1990 Olds Stalls/Bogs on acceleration



 
 
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  #1  
Old September 4th 08, 05:12 AM posted to rec.autos.tech
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Posts: 15
Default 1990 Olds Stalls/Bogs on acceleration

This car is a 3.1 v6 it runs ok most of the time. But randomly out of
nowhere it will bog and stall when you push the gas pedal. Then the
next minute it will be fine and drive like that for awhile. Then out
of nowhere the stalling and bogging happens again. What i have done so
far is unhooked the exhaust thinking it was plugged, and it still did
it. I unhooked and plugged the manifold where the EGR valve was and it
still did it. I also sprayed carb cleaner in all 3 pintles and it
never leaked into the center of the EGR valve.... I changed the
ignition module and coil packs with known good ones from another car
that was working fine. And it still did it. I then watched the fuel
pressure while it was bogging and it held steady around 40 psi.... I
swapped the map, and iac valve for the ones in the other car and it
was the same.... I put the car in neutral and it still bogged..... I
tried the injectors from the other car and it still did it.... I put a
vacuum gauge on it and it has about 18 on the gauge so it doesn't seem
like a vacuum leak. I also sprayed around looking for leaks with carb
cleaner and found none just in case. I tested the tps, coolant temp
and air temp sensors and they all worked as they should. I also put
the crank sensor on my meter and it worked the way it should
also.... I checked voltage at the battery and alternator and both
stayed around 14v while accelerating.... I checked all the spark plugs
and they are gapped properly and don't look wet or lean.... I really
don't know what else to check for. Did i miss anything to look for? Is
this a common problem with a fix that is know for this car? It is
really un drivable at the moment because the stalling always happens
at intersections after being stopped at a light. you go to accelerate
and it will die, restarts fine then dies when you try to go.... but
will run fine if it is just idling

  #2  
Old September 4th 08, 05:44 AM posted to rec.autos.tech
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Posts: 97
Default 1990 Olds Stalls/Bogs on acceleration

Looks like you changed/tested everything, except one of the first
things you shoulda done. Change the fuel filter.
  #3  
Old September 4th 08, 03:03 PM posted to rec.autos.tech
Mark[_1_]
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Posts: 63
Default 1990 Olds Stalls/Bogs on acceleration

On Sep 4, 12:12*am, wrote:
> This car is a 3.1 v6 it runs ok most of the time. But randomly out of
> nowhere it will bog and stall when you push the gas pedal. Then the
> next minute it will be fine and drive like that for awhile. Then out
> of nowhere the stalling and bogging happens again. What i have done so
> far is unhooked the exhaust thinking it was plugged, and it still did
> it. I unhooked and plugged the manifold where the EGR valve was and it
> still did it. I also sprayed carb cleaner in all 3 pintles and it
> never leaked into the center of the EGR valve.... I changed the
> ignition module and coil packs with known good ones from another car
> that was working fine. And it still did it. I then watched the fuel
> pressure while it was bogging and it held steady around 40 psi.... I
> swapped the map, and iac valve for the ones in the other car and it
> was the same.... I put the car in neutral and it still bogged..... I
> tried the injectors from the other car and it still did it.... I put a
> vacuum gauge on it and it has about 18 on the gauge so it doesn't seem
> like a vacuum leak. I also sprayed around looking for leaks with carb
> cleaner and found none just in case. I tested the tps, coolant temp
> and air temp sensors and they all worked as they should. I also put
> the crank sensor on my meter and it worked the way it should
> also.... * I checked voltage at the battery and alternator and both
> stayed around 14v while accelerating.... I checked all the spark plugs
> and they are gapped properly and don't look wet or lean.... I really
> don't know what else to check for. Did i miss anything to look for? Is
> this a common problem with a fix that is know for this car? It is
> really un drivable at the moment because the stalling always happens
> at intersections after being stopped at a light. you go to accelerate
> and it will die, restarts fine then dies when you try to go.... but
> will run fine if it is just idling


I had an 89 Celbrity with 4 cyl engine had the same symptom...it would
run fine but once in a while when you step on the gas after a red
light, it would bog and stall.. It would re-start and run fine..

I never did find the problem...

At one point I was thinking maybe a throttle position sensor problem..
I replaced it and that did not fix it...

Let us know if you figure it out...

Mark




  #4  
Old September 4th 08, 03:10 PM posted to rec.autos.tech
Mark[_1_]
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Posts: 63
Default 1990 Olds Stalls/Bogs on acceleration

On Sep 4, 10:03*am, Mark > wrote:
> On Sep 4, 12:12*am, wrote:
>
>
>
>
>
> > This car is a 3.1 v6 it runs ok most of the time. But randomly out of
> > nowhere it will bog and stall when you push the gas pedal. Then the
> > next minute it will be fine and drive like that for awhile. Then out
> > of nowhere the stalling and bogging happens again. What i have done so
> > far is unhooked the exhaust thinking it was plugged, and it still did
> > it. I unhooked and plugged the manifold where the EGR valve was and it
> > still did it. I also sprayed carb cleaner in all 3 pintles and it
> > never leaked into the center of the EGR valve.... I changed the
> > ignition module and coil packs with known good ones from another car
> > that was working fine. And it still did it. I then watched the fuel
> > pressure while it was bogging and it held steady around 40 psi.... I
> > swapped the map, and iac valve for the ones in the other car and it
> > was the same.... I put the car in neutral and it still bogged..... I
> > tried the injectors from the other car and it still did it.... I put a
> > vacuum gauge on it and it has about 18 on the gauge so it doesn't seem
> > like a vacuum leak. I also sprayed around looking for leaks with carb
> > cleaner and found none just in case. I tested the tps, coolant temp
> > and air temp sensors and they all worked as they should. I also put
> > the crank sensor on my meter and it worked the way it should
> > also.... * I checked voltage at the battery and alternator and both
> > stayed around 14v while accelerating.... I checked all the spark plugs
> > and they are gapped properly and don't look wet or lean.... I really
> > don't know what else to check for. Did i miss anything to look for? Is
> > this a common problem with a fix that is know for this car? It is
> > really un drivable at the moment because the stalling always happens
> > at intersections after being stopped at a light. you go to accelerate
> > and it will die, restarts fine then dies when you try to go.... but
> > will run fine if it is just idling

>
> I had an 89 Celbrity with 4 cyl engine had the same symptom...it would
> run fine but once in a while when you step on the gas after a red
> light, it would bog and stall.. * *It would re-start and run fine..
>
> I never did find the problem...
>
> At one point I was thinking maybe a throttle position sensor problem..
> I replaced it and that did not fix it...
>
> Let us know if you figure it out...
>
> Mark- Hide quoted text -
>
> - Show quoted text -


I forgot to add , in my case it seems it would never happen twice in a
row..you had to be stopped and idling at a light for a minute or so
before it would happen.. just a quick stop and it would never
happen, and it would never happen after a re-start, you had to sit
idling in drive for a minute or two before it would happen...

very tough to troubleshoot... you would really need to instrument the
car to determine if it was a spark or fuel problem or what...

to the other poster, i don't see how this could be a fuel filter
problem...

please let us know if you ever figure it out


  #5  
Old September 4th 08, 03:38 PM posted to rec.autos.tech
Vic Smith
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Posts: 953
Default 1990 Olds Stalls/Bogs on acceleration

On Thu, 4 Sep 2008 07:10:32 -0700 (PDT), Mark >
wrote:


>> I had an 89 Celbrity with 4 cyl engine had the same symptom...it would
>> run fine but once in a while when you step on the gas after a red
>> light, it would bog and stall.. ? ?It would re-start and run fine..
>>
>> I never did find the problem...
>>
>> At one point I was thinking maybe a throttle position sensor problem..
>> I replaced it and that did not fix it...
>>
>> Let us know if you figure it out...
>>
>> Mark- Hide quoted text -
>>
>> - Show quoted text -

>
>I forgot to add , in my case it seems it would never happen twice in a
>row..you had to be stopped and idling at a light for a minute or so
>before it would happen.. just a quick stop and it would never
>happen, and it would never happen after a re-start, you had to sit
>idling in drive for a minute or two before it would happen...
>
>very tough to troubleshoot... you would really need to instrument the
>car to determine if it was a spark or fuel problem or what...
>
>to the other poster, i don't see how this could be a fuel filter
>problem...
>
>please let us know if you ever figure it out
>

Think the 4's had throttle body, but my '88 Celebrity 2.8 with
MFI had similar symptoms. Stalled leaving a stop light, but not
always. Progressed a couple weeks later to stumbling while
accelerating, but not always.
My mechanic replaced 2 injectors and that fixed it.

--Vic


  #6  
Old September 4th 08, 06:39 PM posted to rec.autos.tech
HLS
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Posts: 1,418
Default 1990 Olds Stalls/Bogs on acceleration


"Vic Smith" > wrote in message
> Think the 4's had throttle body, but my '88 Celebrity 2.8 with
> MFI had similar symptoms. Stalled leaving a stop light, but not
> always. Progressed a couple weeks later to stumbling while
> accelerating, but not always.
> My mechanic replaced 2 injectors and that fixed it.
>
> --Vic


I had an 89 Regal with the 2.8 that did the same thing. It was the
injectors.
  #7  
Old September 4th 08, 07:06 PM posted to rec.autos.tech
[email protected]
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Posts: 15
Default 1990 Olds Stalls/Bogs on acceleration

On Sep 4, 10:39 am, "HLS" > wrote:
> "Vic Smith" > wrote in message
> > Think the 4's had throttle body, but my '88 Celebrity 2.8 with
> > MFI had similar symptoms. Stalled leaving a stop light, but not
> > always. Progressed a couple weeks later to stumbling while
> > accelerating, but not always.
> > My mechanic replaced 2 injectors and that fixed it.

>
> > --Vic

>
> I had an 89 Regal with the 2.8 that did the same thing. It was the
> injectors.


was it the injectors themselves bad or the wiring to them?
  #8  
Old September 4th 08, 03:58 PM posted to rec.autos.tech
jim
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Posts: 546
Default 1990 Olds Stalls/Bogs on acceleration



Mark wrote:
>
> On Sep 4, 10:03 am, Mark > wrote:
> > On Sep 4, 12:12 am, wrote:
> >
> >
> >
> >
> >
> > > This car is a 3.1 v6 it runs ok most of the time. But randomly out of
> > > nowhere it will bog and stall when you push the gas pedal. Then the
> > > next minute it will be fine and drive like that for awhile. Then out
> > > of nowhere the stalling and bogging happens again. What i have done so
> > > far is unhooked the exhaust thinking it was plugged, and it still did
> > > it. I unhooked and plugged the manifold where the EGR valve was and it
> > > still did it. I also sprayed carb cleaner in all 3 pintles and it
> > > never leaked into the center of the EGR valve.... I changed the
> > > ignition module and coil packs with known good ones from another car
> > > that was working fine. And it still did it. I then watched the fuel
> > > pressure while it was bogging and it held steady around 40 psi.... I
> > > swapped the map, and iac valve for the ones in the other car and it
> > > was the same.... I put the car in neutral and it still bogged..... I
> > > tried the injectors from the other car and it still did it.... I put a
> > > vacuum gauge on it and it has about 18 on the gauge so it doesn't seem
> > > like a vacuum leak. I also sprayed around looking for leaks with carb
> > > cleaner and found none just in case. I tested the tps, coolant temp
> > > and air temp sensors and they all worked as they should. I also put
> > > the crank sensor on my meter and it worked the way it should
> > > also.... I checked voltage at the battery and alternator and both
> > > stayed around 14v while accelerating.... I checked all the spark plugs
> > > and they are gapped properly and don't look wet or lean.... I really
> > > don't know what else to check for. Did i miss anything to look for? Is
> > > this a common problem with a fix that is know for this car? It is
> > > really un drivable at the moment because the stalling always happens
> > > at intersections after being stopped at a light. you go to accelerate
> > > and it will die, restarts fine then dies when you try to go.... but
> > > will run fine if it is just idling

> >
> > I had an 89 Celbrity with 4 cyl engine had the same symptom...it would
> > run fine but once in a while when you step on the gas after a red
> > light, it would bog and stall.. It would re-start and run fine..
> >
> > I never did find the problem...
> >
> > At one point I was thinking maybe a throttle position sensor problem..
> > I replaced it and that did not fix it...
> >
> > Let us know if you figure it out...
> >
> > Mark- Hide quoted text -
> >
> > - Show quoted text -

>
> I forgot to add , in my case it seems it would never happen twice in a
> row..you had to be stopped and idling at a light for a minute or so
> before it would happen.. just a quick stop and it would never
> happen, and it would never happen after a re-start, you had to sit
> idling in drive for a minute or two before it would happen...


No trouble codes?

there are 3 possibilities. Too much fuel - too little fuel - not enough spark.
It would help if you figured out which. Your description suggests not enough
fuel as the most likely.

Doesn't this engine have a vacuum controlled pressure regulator that controls
fuel pressure to the rail? If so the pressure should drop when idling and
increase when you step on the gas. The vacuum hose to the regulator can
collapses after idling for a while and that might cause the symptoms. Or I
suppose the regulator could just be sticky, but those are just wild guesses
based on the assumption it is not getting enough gas which could be wrong.

-jim



>
> very tough to troubleshoot... you would really need to instrument the
> car to determine if it was a spark or fuel problem or what...
>
> to the other poster, i don't see how this could be a fuel filter
> problem...
>
> please let us know if you ever figure it out



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  #9  
Old September 4th 08, 05:05 PM posted to rec.autos.tech
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Posts: 15
Default 1990 Olds Stalls/Bogs on acceleration

thanks for the replys, I forgot to add I did also change the fuel
filter... it was actually the first thing i did. And it did nothing.
When i check the fuel pressure it reads high 30s at idle and when i
step on the gas it does increase. It seems like it is not getting
enough fuel to me, when it starts to bog if i spray a little carb
cleaner in the hole for the air dam it picks it back up instead of
killing it like it normally would. But my pressure looks good and I
tried injectors out of another car that has been working just fine...
So i don't know how it would not get enough fuel?
  #10  
Old September 4th 08, 05:18 PM posted to rec.autos.tech
jim
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Posts: 546
Default 1990 Olds Stalls/Bogs on acceleration



wrote:
>
> thanks for the replys, I forgot to add I did also change the fuel
> filter... it was actually the first thing i did. And it did nothing.
> When i check the fuel pressure it reads high 30s at idle and when i
> step on the gas it does increase. It seems like it is not getting
> enough fuel to me, when it starts to bog if i spray a little carb
> cleaner in the hole for the air dam it picks it back up instead of
> killing it like it normally would.


Good test. And was your fuel pressure test also while the problem was occurring?
I mean one would expect all tests to tell you nothing when the problem isn't
there. If you are testing the right function when the problem occurs you should
see what it is.
The MAP sensor would have a vacuum signal also that could be faulty due to bad
tubing. Throttle position can have dirty electrical connections. You said you
changed that right?

-jim



> I won't make the
> same mistake again
>


>But my pressure looks good and I
> tried injectors out of another car that has been working just fine...
> So i don't know how it would not get enough fuel?



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