Which spark plugs should I purchase?
- Thread starter Jonarin
- Start date
NebTurboST5
New member
yeah price....
Scottydoggs
Killa Bee
iridium or bust!
Yes, one will work great and the other will suck. The ignition systems in these cars does NOT like Platinum plugs one bit. Just stick with OEM irridiums and a cheap limetime warranty set of plug wires and call it a day. Oh, and do one plug/wire at a time so you don't f up the firing order :th_thumbsup-wink:
LouF
New member
Looking for feedback on using 41-101s
Have had intermittent random misfires for years, have been chasing it (for years). Going back to trying spark plugs. Just replaced existing Autolite APP 606 double platinums with Delco 41-101 iridiums.
From past searching, I thought I should get AC Delcos. Got these w/o refreshing/knowing what I was specifically doing. 41-101 came up on the computer screen, and off I went. I wanted to check what part # I would find since it was hasty and didn't sound familiar. I actually had the standard plug in mind as the one to get. First two test drives were great, but I'm not jumping to conclusions because I recall this euphoria before. I see plenty of OK's and some nays.
Just looking for some "case studies"/experiences,
Thanks
(will post back w/ my results)
'05 GTP, stock (slight change was made to PCM (?) to change shifting points, fuel mixture)
Recent fuel injectors replaced
Fairly new plug wires
Original crankshaft sensor, fuel pump, c.converter.
Recent vacuum leak checks and fix
119,000 mi.
Run 87-91 gas (1st run @ ~90, 2nd at probably more like 88)
I also run an AeroForce OBD reading device. Don't know what I'm doing that much, but O2 sensor readings seem to jump normal; no running tabs on ignition knock retard.
Have had intermittent random misfires for years, have been chasing it (for years). Going back to trying spark plugs. Just replaced existing Autolite APP 606 double platinums with Delco 41-101 iridiums.
From past searching, I thought I should get AC Delcos. Got these w/o refreshing/knowing what I was specifically doing. 41-101 came up on the computer screen, and off I went. I wanted to check what part # I would find since it was hasty and didn't sound familiar. I actually had the standard plug in mind as the one to get. First two test drives were great, but I'm not jumping to conclusions because I recall this euphoria before. I see plenty of OK's and some nays.
Just looking for some "case studies"/experiences,
Thanks
(will post back w/ my results)
'05 GTP, stock (slight change was made to PCM (?) to change shifting points, fuel mixture)
Recent fuel injectors replaced
Fairly new plug wires
Original crankshaft sensor, fuel pump, c.converter.
Recent vacuum leak checks and fix
119,000 mi.
Run 87-91 gas (1st run @ ~90, 2nd at probably more like 88)
I also run an AeroForce OBD reading device. Don't know what I'm doing that much, but O2 sensor readings seem to jump normal; no running tabs on ignition knock retard.
Fivefingerdeathpunch
New member
I'd blame the platinum plugs for the first misfire problem, the waste spark ignition system eats them.
41-101 are the stock plugs and will work just fine. I also wouldn't run anything but 91+ octane in these supercharged cars.
41-101 are the stock plugs and will work just fine. I also wouldn't run anything but 91+ octane in these supercharged cars.
blueguy
The Blue One
If you can have a downpipe installed...catted of course.
If you don't plan on tuning it, that and a TransGo shift kit with new lower mounts will tighten everything up and get rid of the "slop" in the car. A high-flow panel filter and a 180* t-stat won't hurt, either.
And agreed on the octane. I wouldn't ever run anything LESS than 91.
If you don't plan on tuning it, that and a TransGo shift kit with new lower mounts will tighten everything up and get rid of the "slop" in the car. A high-flow panel filter and a 180* t-stat won't hurt, either.
And agreed on the octane. I wouldn't ever run anything LESS than 91.
Fivefingerdeathpunch
New member
Nah, it needs an intake for it's intake bro.
WarStryker13
I break things.
Nah, it needs an intake for it's intake bro.
I think this was meant for another thread... :th_laugh-lol3: nice pic tho, is that your setup?
LouF
New member
Thanks for the replies. Here's how it has turned out:
The engine ran tight and smooth immediately after the new 'plugs, and now has gotten back to the same, frequent "Alzheimer's" and misfiring. Random misfires. Regretfully, I think I'm just going to have to live with it in short of (my solution) replacing the fuel pump, catalytic converter, O2 sensor(s?), crankshaft position sens. and what ever other sensors.
No, I'm not at a point of anything other than factory for now. I wish I knew about the trans kit years ago, but I will definitely look at the mounts.
The engine ran tight and smooth immediately after the new 'plugs, and now has gotten back to the same, frequent "Alzheimer's" and misfiring. Random misfires. Regretfully, I think I'm just going to have to live with it in short of (my solution) replacing the fuel pump, catalytic converter, O2 sensor(s?), crankshaft position sens. and what ever other sensors.
No, I'm not at a point of anything other than factory for now. I wish I knew about the trans kit years ago, but I will definitely look at the mounts.
WarStryker13
I break things.
Try cleaning the MAF, that helped my 04 gt's random misfire when I first got it, after new Delphi wires and Delco plugs didn't permanently fix it.
After that, I'd look at the cat, it could be starting to clog up; and the o2, those sometimes go bad, but still work "ok" according to the PCM.
After that, I'd look at the cat, it could be starting to clog up; and the o2, those sometimes go bad, but still work "ok" according to the PCM.