Eco spark plug gap
#262
Senior Member
Originally Posted by Deerhunter4
FYI. I have driven several thousand miles since regapping mine and I'm confident that the truck runs better. Smooth idle and no shuddering.
I would agree with you. The truck idles much better. Never had the shudder issue. Hope to never have it.
#263
Originally Posted by Deerhunter4
FYI. I have driven several thousand miles since regapping mine and I'm confident that the truck runs better. Smooth idle and no shuddering.
#264
Senior Member
I took mine in due to rough idle, was out of town last week and one morning was likely around 50 deg F. Startup it shook and I thought the truck was going to die. I noticed too the RPM gauge bouncing, it may have been some before but I don't think that much as the whole truck just didn't seem as smooth. Runs just a bit rough even at a stop light. Then I thought maybe poor gas, but after second tank and still seeing the rpm gauge bounce like it did I took it in, oil change was close to due anyway and figured I have a warranty, let them look at it.
I asked them if they had or new of any issues with spark plug gap differences and they said no knowledge. As to the issue I get a report of:
"No info for concern on oasis, eec test - no DTC's present, pass cont/koeo/koer self tests, let vehicle sit for 4 hours..overnight and performed power balance test at cold start- no problem found, all PID's within normal ranges, some tachometer fluctuation at idle is normal on this vehicle and is a normal operating characteristic due to the sensitivity of the gauge."
Who knows, maybe my plugs will all be within normal range, but I will check soon myself and if I do find they are out I will definitely let them know and update here.
I asked them if they had or new of any issues with spark plug gap differences and they said no knowledge. As to the issue I get a report of:
"No info for concern on oasis, eec test - no DTC's present, pass cont/koeo/koer self tests, let vehicle sit for 4 hours..overnight and performed power balance test at cold start- no problem found, all PID's within normal ranges, some tachometer fluctuation at idle is normal on this vehicle and is a normal operating characteristic due to the sensitivity of the gauge."
Who knows, maybe my plugs will all be within normal range, but I will check soon myself and if I do find they are out I will definitely let them know and update here.
#265
V-8 Sounds Great
I took mine in due to rough idle, was out of town last week and one morning was likely around 50 deg F. Startup it shook and I thought the truck was going to die. I noticed too the RPM gauge bouncing, it may have been some before but I don't think that much as the whole truck just didn't seem as smooth. Runs just a bit rough even at a stop light. Then I thought maybe poor gas, but after second tank and still seeing the rpm gauge bounce like it did I took it in, oil change was close to due anyway and figured I have a warranty, let them look at it.
I asked them if they had or new of any issues with spark plug gap differences and they said no knowledge. As to the issue I get a report of:
"No info for concern on oasis, eec test - no DTC's present, pass cont/koeo/koer self tests, let vehicle sit for 4 hours..overnight and performed power balance test at cold start- no problem found, all PID's within normal ranges, some tachometer fluctuation at idle is normal on this vehicle and is a normal operating characteristic due to the sensitivity of the gauge."
Who knows, maybe my plugs will all be within normal range, but I will check soon myself and if I do find they are out I will definitely let them know and update here.
I asked them if they had or new of any issues with spark plug gap differences and they said no knowledge. As to the issue I get a report of:
"No info for concern on oasis, eec test - no DTC's present, pass cont/koeo/koer self tests, let vehicle sit for 4 hours..overnight and performed power balance test at cold start- no problem found, all PID's within normal ranges, some tachometer fluctuation at idle is normal on this vehicle and is a normal operating characteristic due to the sensitivity of the gauge."
Who knows, maybe my plugs will all be within normal range, but I will check soon myself and if I do find they are out I will definitely let them know and update here.
I gapped my stock plugs, but they were all already at 0.034-0.035 so that didn't help the issue. I'm going to try new NGK's in a couple of days when I get some time off.
Last edited by boosted150; 10-11-2012 at 06:29 AM.
#266
I pulled plugs and all were between .038-.040. I replaced them with the NGK IX gapped to .030. I can't really tell anything at idle. At full throttle it pulls smoother. It used to have a strange rubberband feel around 5k and that's gone.
#267
Senior Member
Hey guys, I went back to my parts dept, pulled 6 new plugs off the shelf. They ranged from .035-.041 brand new.... I have had the same miss/stutter usually around the 4000-4500 RPM mark. I run a 93 octane race tune, and it is not all the time, but seems to getting more noticeable. So, I decided to gap them all to .030, and install them, and measure the gaps on my factory plugs and see the difference.
#268
Senior Member
Just like I figured. They were all way different, ranged from .032 to .044!!! I will report back after driving with them all set at .030.