Question about 1997 GMC Sonoma

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1997 sonoma fouling plugs

Fouling plugs 2,4 and 6 - have tried replacing wires, O2 sensor, and cam sensor - any suggestions

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  • 14 Answers

1) Identify the foweling type http://www.gnttype.org/techarea/engine/plugs.html
2) "Worn piston rings or valve seals may allow too much oil to leak into the combustion chamber, leading to oil fouling." This could be your case http://www.ngksparkplugs.com/techinfo/spark_plugs/faq/faqfouled.asp?nav=31200&country=US
More reading http://www.autotap.com/sparkplugs/ppc_spark_plugs_replace.html
Good luck!

Posted on Jun 26, 2009

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2006 Dodge Ram 1500 code p1128 and p1129


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Suggest you fuel up asap with PREMIUM fuel (for 1 tank) and 1 can super concentrated injector cleaner for next 2 tanks. Check air filter clean. Check air intact air analyser sensor wire is clean, pull the plugs and check condition and gap, replace them if fouled or worn.

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I cannot understand your statement "wich sensor is in bank 2"

If i am not wrong you are asking which sensor is present in bank 2 .

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P1152 Means a rich bank 2 O2 sensor
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I would check your fuel injector for fouling
When they foul the will develop a drip
Causing a fuel fluctuation that will have O2 sensors reporting rich and lean voltage changes
This causes the pcm to adjust injector pulses making them shorter and longer.
causing more fuel or less fuel.
From this condition you may see plug fouling.
Also check for leaking or faulty fuel pressure regulator or restricted return line.
Most of the time it wont be a bad O2 sensor the O2 sensor is just doing its job.
You also have already changed the plugs and Map so there already out of the way.
If this helps please give me some feed back
Hope this works for you FixYa

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