So yeah what does a bad plug wire do

[smug]

Sunday I did a few thing to the GTP such as changed the oil, NGK TR5 plugs, new s/c idler pulley, hacked out a 01+ style air dam to fit with my FMHE, and flashed the PCM to get the car to run a little leaner. Now under boost and heavy loads I get what I feel is a misfire and the car kind of, well runs like shit. I ran a few scans and I am not getting any KR, no belt slip,I changed the plugs back to the last set to try and rule that out, went back to my last PCM flash to try and rule that out and I am just not getting any where.

The only other thing is maybe I internally broke a plug wire and that is very possible being that are just some part store brand wires. I dont even know that brand of plug wire that is on the car or how old they are. So I am thinking a new set of AL 103 plugs because 3800s love them and a new set of OE wires? Sound good?

Oh the PT is not picking up any mis fires. I guess because it is not bad enough to trip out the computer

Click to read more...

 

[Bru]

Any miss under load that I've had has been due to plug wires. One of my wires got so hot from the headers that it melted and then cracked underneath out of sight. And it seems any time you take them on and off once or twice they go to shit.

Rockauto has had a few wholesale closeouts on Delco plug wires recently. I got a set of OEM wires for $20 last month that are going on the car soon.

 

[The Broken Regal]

^^^ This, stock wires have been so bad to me over the years... change the plugs = change the oem wires... surprised you dont have upgraded aftermarket wires on that race-car!

 

[Droptopta69]

Sunday I did a few thing to the GTP such as changed the oil, NGK TR5 plugs, new s/c idler pulley, hacked out a 01+ style air dam to fit with my FMHE, and flashed the PCM to get the car to run a little leaner. Now under boost and heavy loads I get what I feel is a misfire and the car kind of, well runs like shit. I ran a few scans and I am not getting any KR, no belt slip,I changed the plugs back to the last set to try and rule that out, went back to my last PCM flash to try and rule that out and I am just not getting any where.

The only other thing is maybe I internally broke a plug wire and that is very possible being that are just some part store brand wires. I dont even know that brand of plug wire that is on the car or how old they are. So I am thinking a new set of AL 103 plugs because 3800s love them and a new set of OE wires? Sound good?

Oh the PT is not picking up any mis fires. I guess because it is not bad enough to trip out the computer

thats most likely your problem, id revert to the old tune and see. the computer can pick up even the slightest miss. so idk what to say about that. but could be due to leaning out or as i call it now "nmskulling"

 

[smug]

flashing back to the previous tune made no difference. Out if like the 400 times I have has the plugs and wires off I have yet to break one.....Till now

 

[10sec]

Fail. Clearly you suck at life

What did ya gap them to?

 

[smug]

.050

 

[10sec]

Damn, that's a lot of gap for a 2.8 pulley car or is it a 3.0? Either way, that's a lot of gap

 

[1998gpgt]

my 2.8 enjoys TR6s at .045

 

[10sec]

Supercharged assholes, I went from 9psi to 11psi with an .035 gap and get spark blowout like a bitch. Now i have to pull the plugs again, on a CT kit. FML

 

[Freebeer187]

I had a cracked spark plug that ran like shit when the S/C kicked in. But it ran fine when driving normal.

 

[Turbocharged400sbc]

....sounds like a cam


you prob did break the conductor. bendable or 45* boot univ v8 sets are great and give you 2 spare wires that can be uses at full length then shortened if one of the initial 6 requires replacement.
main thing is large bends n silglyd at the plugs to let em come off far easier for less wrestling

 

[10sec]

Why do we use such shitty plugs? We need RVR to come up in here and educate us on a real plug to use on our cars.

 

[smug]

Whats the final word on that plugs I should use and what gap? Everyone seems to have their preferred brand of plug and gap.

 

[PANDA]

Why do we use such shitty plugs? We need RVR to come up in here and educate us on a real plug to use on our cars.

Ron Vogel uses Champion spark plugs IIRC.

Whats the final word on that plugs I should use and what gap? Everyone seems to have their preferred brand of plug and gap.

I never even heard of anyone running TR5's on a 3800... . I run TR6 @ 55.

 

[Eagle]

I'd just toss on a new set of wires, it's good peace of mind if nothing else... and you seem to think they might be crap in any case.

Also, as PANDA said.... TR6 FTW!

 

[02BlueGT]

Ron Vogel uses Champion spark plugs IIRC.



I never even heard of anyone running TR5's on a 3800... . I run TR6 @ 55.

TR55 are what is "recomended" temp for a GT... If you want a colder TR plug, run a TR7, TR8, to TR8R (race) (can be bought from ZZP or sparkplugs.com)

I actually run the TR6i, the iridums idle much nice, and even though James will talk shit about rare metal plugs, I didn't see any difference in KR from the 103/104 - TR6i

 

[TommyGloves]

I run stock coils, Delco wires and TR6 plugs at .54 on both my cars (both cammed, ICed, 14psi, blah blah blah.) No spark blowout or WOT misfire issues.

 

[Handsome Jesus]

I'm finally trying these mythical TR6 plugs.

I got a misfire like this once coming back from the racetrack. ended up dropping the gap on the plugs and that fixed it... but it still remains a mystery. Though I am still running the plug wires that came with the $150 engine and trans from the junkyard.

 

[DanJ]

TR6 FTW

 

[EmersonHart13]

What happened to the Autolite love?

 

[Eagle]

ALs dont idle very well... but they do take abuse better than a NGK (aka: shit tons of spray or really high boost).

 

[Mook]

What happened to the Autolite love?

i ran autolite's exclusively on my last gtp. never let me down.

pretty sure the daytona has NGKs in them. colleens does for sure.

 

[Bru]

I did a bunch of research on ClubGP, and asked here, and will be going with TR6.

 

[TommyGloves]

Like Eagle mentioned....NGKs improved my idle quality and *maybe* a slight increase in fuel economy on my SSEi. The wear/appearance of the NGKs after 3K seems much better too.