Question about 2001 Chevrolet Venture

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I am trying to find the location of both O2/ heat sensors. my van runs perfect until warmed up and then stops with a cought and has to sit for a time and then it's okay again I have found some vac leaks and replaced all of them that were sucking starter flluid when sprayed help.

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Have you checked your EGR valve? That might be plugged up so it is not able to open properly when it warms up.

Posted on Oct 02, 2009

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I have1990 Chevy Astro van,it starts just fine,when it warms up,driving it or sitting still in drive or reverse, it stalls,I start it back up,in park or neutral,it stays idiling.Idles cold,stalls warm


Check the ECM grounds, they are under the passenger side kick panel. When the engine goes to warm status, the Oxygen sensors come on, If there is no ground on the ECM then it starts pulling ground voltage across the sensors and that causes big issues.

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1996 honda odyssey runs rough when cold


Sounds like it needs a new thermostat.

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1988 chevy spectrum dies when first excellerate from stop light


Did you change the fuel filter? Also if this could be temperature related, does the distance matter for the first stoplight? The O2 sensor may not be warm enough.

How about Vacuum? Use of Brake booster pulls down engine vacuum and you have ZIP when accelerating. Then loose gasket tightens up with engine heat and there is enough vacuum to eliminate the problem.

EGR slightly dirty, sticks until heated up?

I am curious, please send final results.

Oct 09, 2012 | 1988 Chevrolet Spectrum

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Oxygen sensor heater control circuit, low voltage bank 1 sensor 1 p0031 code. will this make it hard to start?


yes and also may make it run rough or lack power. the o2 sensors tell the computer how to make the engine run

Feb 13, 2010 | 2002 Hyundai Santa Fe

1 Answer

Engine stalls out after warmed up


hi, to me this sounds like you have a problem with the oxygen sensor ( or lambda sensor for its proper name)
The reason it points towards this is that the O2 sensor dont start working until the engine reaches a certain temp so if it runs perfect until it gets warm and then runs perfect when the engine has cooled down then i would say that it is this sensor at fault.

You would need to get the sensor tested before replacing as it can be expensive to buy the part.

Let me know how you get on or if you need further assistance ok

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the o2 sensor shouldn't prevent the van from starting, go back to basics and check for spark and fuel, my guess is fuel

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WELL YOU CHANGED ALMOST EVERY THING EXCEPT IGNITION CONTROL MODULE........

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Truck won't run


fuel pressure regulator might be to blame,on vortec models it is located under intake manifold plenum bolted to cpi unit and not real easy to change,o2 sensors will not keep it from running only affects how it runs,on your 96 i think there are 2 o2 sensors before the catalytic converters and 2 after.

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3 Answers

1996 Chevy Express 1500 w/5.0 bogging only when warm.


The cylinder 7 misfire is likely a symptom of the problem, not the problem itself.

Typically, the catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream 02 sensor reading should be fairly steady. Typically the P0420 code triggers the check engine light if the readings of the two sensors are similar. This is indicative of (among other things - such as faulty sensors in the "emissions loop") a converter that is not working as efficiently as it should be.

I do not believe that it is a problem with a valve/head gasket or cam.

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