Question about 1996 kawasaki GPZ 500 S - GPX 500 R

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Following replacing the downpipes I have found

Kawaski GPZ500s 1996
Following replacing the downpipes I have found that the engine runs very hot. So hot on one cylinder that the downpipe begins to get red hot! Some time in the bikes history the old down pipes had the cross-over pipe removed, the repalcements are as original standard fit. Any ideas so that I don't wreck the engine, please......

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Changing exhaust pipes to a different than stock i.e.free flowing,system necessitates re-jetting carburetters. one hot cylinder indicates a too lean condition often caused by maladjusted float level or restriction of fuel flow to ,or within the carb of the affected cylinder.multi-carb setups must be 'calibrated' so they work in unison.

Posted on Sep 29, 2009

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1 Answer

Catalytic converter


The exhaust downpipe is glowing red with heat?
To be honest, that may be fuel-air /and or cylinder head problem. A downpipe gets very hot, yes, but they don't glow red.

A faulty oxygen sensor can cause the catalytic converter to overheat - with disastrous results.

If you're not sure what you're doing don't mess around with things. get somebody who knows what they are doing to look at your car and give you an opinion

Feb 17, 2016 | 2006 Nissan Sentra 2.5

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Harley downpipes glowing red


Could be running VERY rich causing ignition of the exhaust gases once the second cylinder is on its exhaust cycle. This would cause both flames out of the exhaust as well as the crappy performance. Pull the plugs and see if they're dark.

Clean the plugs
If the plugs look darkened you can use the A\F mixture screw on the carbs to lean out the mixture.

To tune like this.
Find both A\F mixture screws on both carburetors.
Find out which way to spin them to lean the mixture out (for me it was to tighten them).
Using 1\8th turn adjustments do one carb at a time until it runs better\stops backfiring.
Now that it's running decently go for a spin WITH NEW PLUGS, after a good little jaunt let the engine cool and pull the plugs, if they look white you need more fuel, if they look sooty you could need to lean out the mixture 'slightly'.

Feb 16, 2012 | Harley Davidson Motorcycles

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How any oxygen sensors are on a 1999 grand cherokee laredo 4.0 & were is it/they located?


On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

1 Answer

P0171


Ho Joanne:
On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

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