Question about 2002 Oldsmobile Silhouette

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This vehicle has been in other repair shops for a poor running issue befroe we got it. when cold runs like **** , has had 3 converters, both 02 sensors , mass air flow , fuel filter, ignition module, crank sensor, i am stumped

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If it hasn't been done already, have a fuel pressure test done on it,
have the map and throttle position sensor checked, and egr valve.
I don't know what was checked on this car, or if the repair shops looked for the right thing.
You didn't mention the things I suggested to have checked, that's why I suggested them, hope this helps.

Posted on Jul 30, 2009

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1996 cherekee 4lt cold starting idles good warms up idles rough. exhaust fums stink. fueling up spark plugs .speedo289000klm'can any one help


is the problem only on a cold engine, hot or both?
is the hot engine reaching and holding 180F or more as it must?>
its running rich
and that is misfire.
lots of causes for rich. the tests are easy in shop with tools.
  1. a full tuneup.
  2. fuel pressure to high we, use a gauge. (FPR bad?)
  3. leaking injectors.
  4. ECT failure, scan it and must read 180f, hot, if at 180f hot.?
  5. this takes 5 min work on any scan tool (real)
  6. map hose clogged. or leaking. the Map sensor must not be blocked in any way to the plenum vacuum. or it will lie and it will run real bad.
  7. on a hot engine, the 02 sensors can fail, or is good and the exhaust cracks in the header do that. on mine it did 3 times.
cracks in the exh header, there must not he any leaks in that header (or bad gaskets)
or the 02 lies. , goes to 0volts and then engine runs rich as a piggy. (my scan tool shows this is seconds, 02 flat-lined at 0v.
all cars, with 02 do that. with that issue.
02 means oxygen sensor, the front one, not the rear one.

Dec 11, 2016 | 1996 Jeep Cherokee

1 Answer

Volvo v40gdi sometimes won't start but starts fine from cold when trying to start it chokes and struggles if I remove air filter assembly it starts fine,


To troubleshoot the issue, click the link below:

Car Repair Diagram

http://technoanswers.blogspot.com/2013/03/car-repair-diagram.html

-------


HOT/WARM START ISSUE


Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.


Also it can be weak battery or starter.


But possibilities are to be inspected to confirm what exactly it is.------


To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------


Click the link below:------


1991 Toyota Trecel: Engine Starts fine but dies when gets Warm?

http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

-------------

1994 Toyota Pickup: Starts fine but dies in few seconds?


http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html

------------

1995 Lexus LS400: Running Hot?

http://whatisbyme.blogspot.in/2012/05/1995-lexus-ls400-running-hot.html

------------

2002 Toyota Camry: Puff of Blue or White Smoke while Starting?

http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

------------

Multiple problems on car: Car runs hot, A/C blows hot and car starts surging?

http://schematicsdiagram.blogspot.in/2012/04/multiple-problems-on-car-car-runs-hotac.html

--------------

Delay starting on Toyota Prius?


http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

-----------

Honda car will not start intermittently?

http://technoanswers.blogspot.in/2012/02/honda-car-will-not-start-intermittently.html

--------------

Vehicle Starts, Runs and Loses Power

http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Intermittent starting issues on Volvo 760?

http://schematicsdiagram.blogspot.in/2012/02/intermittent-starting-issues-on-volvo.html

-----------

Car starts and cuts off immediately?

http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

-----------

Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

===========

These details will help.

Thanks.

Mar 14, 2013 | Cars & Trucks

1 Answer

Will not start up if engine is hot


To troubleshoot the issue, click the link below:

Car Repair Diagram

http://technoanswers.blogspot.com/2013/03/car-repair-diagram.html

-------


Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.


Also it can be weak battery or starter.


But possibilities are to be inspected to confirm what exactly it is.------


To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------


Click the link below:------


1991 Toyota Trecel: Engine Starts fine but dies when gets Warm?

http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

-------------

1994 Toyota Pickup: Starts fine but dies in few seconds?


http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html

------------

1995 Lexus LS400: Running Hot?

http://whatisbyme.blogspot.in/2012/05/1995-lexus-ls400-running-hot.html

------------

2002 Toyota Camry: Puff of Blue or White Smoke while Starting?

http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

------------

Multiple problems on car: Car runs hot, A/C blows hot and car starts surging?

http://schematicsdiagram.blogspot.in/2012/04/multiple-problems-on-car-car-runs-hotac.html

--------------

Delay starting on Toyota Prius?


http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

-----------

Honda car will not start intermittently?

http://technoanswers.blogspot.in/2012/02/honda-car-will-not-start-intermittently.html

--------------

Vehicle Starts, Runs and Loses Power

http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Intermittent starting issues on Volvo 760?

http://schematicsdiagram.blogspot.in/2012/02/intermittent-starting-issues-on-volvo.html

-----------

Car starts and cuts off immediately?

http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

-----------

Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

===========

These details will help.

Thanks.

Mar 14, 2013 | 2006 Nissan Altima

1 Answer

I have a 2003 Acura MDX touring. I just had the timing belt, water pump, thermostat replaced as a maintenance repair (190K miles). The car was running fine when I took it to the shop for repair. Upon


I have 2 questions

Why would you not check for codes & make the proper
repair within a week of any check light,that is what is required

You say been on awhile,the vehicle had a fault code & system
problem & still does

Why would you have a timing belt & water pump installed &
any repair shop return your vehicle with a check light on

What sort of shop is that to return an undiagnosed vehicle

Neither you nor the shop seen to have any interest in
these check lights Why is that?

Mar 10, 2013 | Cars & Trucks

1 Answer

Cold engine cranks when bumpping the starter once. After engine is wram you have to bump starter three time to crank. 1997 jeep wrangler 4.0 engine. What is the problem. Thanks


Its a hot start issue.

Can be related to low fuel pressure or problem with crank sensor.


Also it can be weak battery or starter.


But possibilities are to be inspected to confirm what exactly it is.------


To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------


Click the link below:------


1991 Toyota Trecel: Engine Starts fine but dies when gets Warm?

http://whatisbyme.blogspot.in/2012/05/1991-toyota-trecel-engine-starts-fine.html

-------------

1994 Toyota Pickup: Starts fine but dies in few seconds?


http://howtobyme.blogspot.in/2012/05/1994-toyota-pickup-starts-fine-but-dies.html

------------

1995 Lexus LS400: Running Hot?

http://whatisbyme.blogspot.in/2012/05/1995-lexus-ls400-running-hot.html

------------

2002 Toyota Camry: Puff of Blue or White Smoke while Starting?

http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

------------

Multiple problems on car: Car runs hot, A/C blows hot and car starts surging?

http://schematicsdiagram.blogspot.in/2012/04/multiple-problems-on-car-car-runs-hotac.html

--------------

Delay starting on Toyota Prius?


http://schematicsdiagram.blogspot.in/2012/02/delay-starting-on-toyota-prius.html

-----------

Honda car will not start intermittently?

http://technoanswers.blogspot.in/2012/02/honda-car-will-not-start-intermittently.html

--------------

Vehicle Starts, Runs and Loses Power

http://whoisbyme.blogspot.in/2012/07/vehicle-startsruns-and-loses-power.html

--------------

Intermittent starting issues on Volvo 760?

http://schematicsdiagram.blogspot.in/2012/02/intermittent-starting-issues-on-volvo.html

-----------

Car starts and cuts off immediately?

http://repairhelpcenter.blogspot.com/2012/01/car-starts-and-cuts-off-immediately.html

-----------

Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

===========

These details will help.

Thanks.

Dec 17, 2012 | Jeep Cherokee Cars & Trucks

2 Answers

To much fuel consumption


TOO MUCH FUEL CONSUMPTION CAUSED BY STOPPED UP AIR FILTER, LOW TIRE PRESSURE, RUNNING AIR CONDITIONER,FAST TAKE OFFS, FAULTY TRANSMISSION TORQUE CONVERTER NOT LOCKING UP TO OVER DRIVE.LOT OF CITY DRIVING LIKE SHORT STOPS,DIRTY FUEL INJECTORS.CHECK FOR FUEL LEAKAGE.MANUAL TRANSMISSION CLUTCH SLIPPING.

May 28, 2011 | Toyota Corolla Cars & Trucks

2 Answers

Check engine light came on recently. Car then


The exhaust system has two 02 sensors One before the cat converter and one after. The #2 02 behind the cat converter is the one that trips the light if emmisions are unacceptable coming out of the converter. The #1 or front 02 sensor monitors and constantly adjusts the fuel to stay within parameters. If the #2 tries to compensate for an inefficient converter and it conflicts with the #1 02, the ebgine will run poorly due to either too rich or too lean fuel adjustment. Have the #2 02 sensor replaced and the converter checked. Good luck

Nov 15, 2009 | 2005 Toyota Corolla

1 Answer

Poor fuel mileage


what kind of exhaust do you got, the converter actually may help get better mileage. scan egr for errors in emmisions, get the timing checked mabe running rich, check pcv valves,test knock sensor, 02 sensor( scan might not pick up) lemme know how it goes

Mar 02, 2009 | 1996 GMC Sierra

1 Answer

Hyundai accent 05, goes to 5000rmp at speed 20km/hr


You need to have to transmission filter changed. Dirty filter and not letting it shift. Can you start the motor and let it run about 10-minutes befroe driving. It could be that the fluid is cold and thick, not wanting to shift????? Try that.

Jan 15, 2009 | 2005 Hyundai Accent

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