Plug change... now problem!
Plug change... now problem! I started to change my plugs last night and got half way done (replaced all plugs on drivers side) and decided to wait until today to replace the rest of them. This morning I jumped in the car to run to the grocery and the car ran fine on the way there. But on the way back I decided to get in it a little bit and the car is missing badly above 4500 RPM at WOT. I took a detour to try it out again and it does the same. Before you ask I did not replace the wires and I used NGK Iridium plugs. I falied to use any dielectric (sp) grease on the wires. Does this sound like a plug wire problem? The car ran fine before I worked on it last night, just had a little hesitation, but still ran hard. Now it is running like ****. I checked and rechecked all wires before I fired it up this morning and everything appeared to be in order. The car runs perfect during normal driving but once you get in it and get past about 4500 RPMS it cuts out like a b!tch. Should I pull the wires off again and put some grease in them, could this be the problem? The car did not set an SES light, which I thought was odd considering how it was running. All help is appreciated!
Last edited by Black 99 Bird; Jun 11, 2006 at 07:34 AM.
FWIW one of the new plugs could be defective, just because it's new means nothing
Carefully check the white porcelain part of the plugs for cracks, or put the car in a dark garage and rev to 4500 and look for arcing, chances are that will be the bad plug
Carefully check the white porcelain part of the plugs for cracks, or put the car in a dark garage and rev to 4500 and look for arcing, chances are that will be the bad plug
Originally Posted by Black 99 Bird
If I had a problem plug, wouldn't it show up in normal driving? Thanks for the help guys, I guess I'll yank them all and check them out.
At WOT more spark energy is required to ignight the mixture, most likely you have a lose wire and the current is taking the path of least resistance which isn't throught the plug at WOT.
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Originally Posted by Black 99 Bird
I need new wires anyway, 97K on factory wires. I'll put in a order for some MSDs today. I'll post up if it fixes the problem. Thanks for all the help guys!