200 HPDI fouling plugs- Thanks, Rodbolt

[bweaver]

Thanks for your suggestions, Rodbolt. Your response a couple of weeks ago was very detailed and helpful.<br /><br />On the third try we figured out the problem. (I was ready to replace the O2 sensors even though thet insisted they were OK.) I had a bad connection inside the plug connecting the Throttle Position Sensor plug. It usually worked but gradually caused the plugs to foul, then really wouldn't run well. <br /><br />We didn't even have to replace the plug, just reposition it and be sure it was really tightly plugged together. Both 200s ran perfectly for 8 hours after that.<br />

 

[rodbolt]

Re: 200 HPDI fouling plugs- Thanks, Rodbolt

glad ya found it.<br /> like I say electrical failures are really rather rare, usually its a mechanical failure and about half the time it was a created failure.<br /> you would not belive the engines I get with odd problems that if I can get a copy of the last work order I can rapidly diagnose based on the last service procedure.<br /> sparkplugs go bad occasionally its a fact of life, however 90% of the time plug fouling is a symptom not a problem.<br /> if you replace a set without finding the failure cause, failure again is assured. sometimes finding the cause may take a bit.