Rust on plug leads

kev25v6 · Jul 26th, 2010, 13:45

Ive not been getting very good mpg for a while now and finally got round to checking things over. It had a service a few thousand miles ago with air, oil and fuel filter. I checked the plug caps and one looked like its had water in there but there was none in it tight now. Its got brown rust marks down the recess that its in and the end of the plug lead was brown too. I cleaned it up a bit and made sure all the connections were on tight, one clicked on a lot better, but will i need to replace the plugs and leads since they have got wet? Will it likely make any difference to the running/mpg with just cleaning them up?

stevo48 · Jul 26th, 2010, 19:54

I have had a similar experience with my daughters car this weekend, her car started running rough on saturday night (missfiring badly), upon investigation i discovered two of the HT connectors for the spark plugs had what looked like rust (yellow/orange dust) on the rubber sleeves but after having a diagnostic done it turns out the coilpack was foobarred and the "rusty" deposits on the rubber sleeving was one of the indicators.
Ebay to the rescue on sunday afternoon, 2nd hand coil pack purchased and
fitted and she was able to drive home (Abingdon, Oxfordshire) with no further trouble.
Dad left out of pocket but one happy daughter and family.

kev25v6 · Aug 16th, 2010, 21:11

Will look at getting a new coil pack then, thanks.

Jul 26th, 2010, 13:45	#1
kev25v6 Member Last Online: Dec 3rd, 2016 19:42 Join Date: Feb 2010 Location: Clowne	Rust on plug leads Ive not been getting very good mpg for a while now and finally got round to checking things over. It had a service a few thousand miles ago with air, oil and fuel filter. I checked the plug caps and one looked like its had water in there but there was none in it tight now. Its got brown rust marks down the recess that its in and the end of the plug lead was brown too. I cleaned it up a bit and made sure all the connections were on tight, one clicked on a lot better, but will i need to replace the plugs and leads since they have got wet? Will it likely make any difference to the running/mpg with just cleaning them up?

Aug 16th, 2010, 21:11	#3
kev25v6 Member Last Online: Dec 3rd, 2016 19:42 Join Date: Feb 2010 Location: Clowne	Will look at getting a new coil pack then, thanks. __________________ 2003 V70R Geartronic

Jul 26th, 2010, 19:54	#2
stevo48 Premier Member Last Online: Jul 9th, 2020 20:08 Join Date: Dec 2007 Location: Halifax West yorkshire	I have had a similar experience with my daughters car this weekend, her car started running rough on saturday night (missfiring badly), upon investigation i discovered two of the HT connectors for the spark plugs had what looked like rust (yellow/orange dust) on the rubber sleeves but after having a diagnostic done it turns out the coilpack was foobarred and the "rusty" deposits on the rubber sleeving was one of the indicators. Ebay to the rescue on sunday afternoon, 2nd hand coil pack purchased and fitted and she was able to drive home (Abingdon, Oxfordshire) with no further trouble. Dad left out of pocket but one happy daughter and family.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)