Dark brown plugs\semi melted electrode?

sprayedstang · 04-08-2002, 03:35 PM

Have about 1100 miles on new engine. See sig. About a week ago it started acting up. Harder to start. Will idle for about 45 secs. to a min. Then die. Had autolite 25's in it. Pulled them all, and they were a dark chocolate brown. and the little tip, or electrodes, were a little rounded. Ran to parts store and bought the Autolite 65's. Also a new cap, rotor, and cleaned the K&N. What is causing this to happen to the plugs guys? Am I using the right heat range on the plugs? Also, I've noticed that most of you guys in here are running on average, between 32 and 38 lbs. of fuel pressure. I'm at about 45 lbs., vacuum line off reg. of course. It won't idle worth a crap or even run below 36 lbs. Any ideas on these gremlins guys. Sure is appreciated largely. Peace.......

Hozer 88GTConv · 04-08-2002, 05:41 PM

I haven't had any personal experience with what you are having. Sounds like detonation though.
Do you have pictures of the plugs available for the web?
Sounds like you might have to go to a colder range.
What is your timing at?
Pictures would really help too, there are several smart guys on this site who can tell you much more info than I can.

sprayedstang · 04-08-2002, 06:06 PM

Thanks for your reply HOZER. I posted this from work. I will get a pic. of the plugs on here a bit later. I did go to a colder plug(Autolite 65).
Anyone else?...............

Hozer 88GTConv · 04-08-2002, 07:33 PM

Here's the Chilton's "detonation pic"...

sprayedstang · 04-08-2002, 11:08 PM

NOT quite that extreme on the meltdown.

I've got a week and a half until the opening day of Rocky Mountain Raceway. And I'll be damned if some SS f-body or any other bowtie is gonna show me his *** end at the end of the 1320'. I'll let ya know what transpires Hozer. Thanks for your time and attention to MY problem. This is why I love these types of services. Kool people. Peace........................

Coupe5oh · 04-08-2002, 11:29 PM

Well judging from your name i was gonna reply...well you know, but obviously the juice aint installed?

How do you like those holley heads? with your setup you should show many blowties the stangin tailights.....good luck

Let us know some e.t.'s

oh btw, im sure you know, but dont spray 175 shot with that 155 fuel pump, id go with a 190, or 255 to be safe, that would really melt plugs, i seen a little old carbed 302 with e.t. streets lift the wheels with a 175 shot, i'll never forget the black puff he blew out, as he spanked a c5 vette badly.. i'll stop now lol

sprayedstang · 04-09-2002, 01:19 AM

Your absolutely right on the fuel pump output. I wont sip on the bottle at full giddyup till I learn to tune, and learn to keep it pointed in a semi straight line(barely do now

). AND drop the tank and do the swap. As far as the bowties,.....this guy around town has a teal '96 SS CRAMaro with some exhaust work and a chip, and he's been pipin me whenever we pass each other and I've just kept my composure,(teeth gritting

), while I was letting everything seat(Moly rings). Well, last weekend we ended up on the same 2 lane road goin the same direction. 40 mph. road. He blips the Borla Y pipe at me to taunt me. Right there I decided that the new powerplant was compfortable enough, and gave him a 3rd. gear hop and he did the same, but did'nt let up. We were off. He had about a car car jump on me. I'm sure all the while thinking he would not be seein me again.

I grabbed 4th, and gave him a "bye-bye" wave as I let him get an earfull of X-pipe scream. NOW, he wants me to pull over. So asks me the "WTF have you done to it" greeting. He turned out to be pretty cool all in all though. thanks for everyones (2)

replies. Peace.......................

04-08-2002, 03:35 PM	#1
sprayedstang Registered Member Join Date: Mar 2002 Location: Utah Posts: 5	Dark brown plugs\semi melted electrode? Have about 1100 miles on new engine. See sig. About a week ago it started acting up. Harder to start. Will idle for about 45 secs. to a min. Then die. Had autolite 25's in it. Pulled them all, and they were a dark chocolate brown. and the little tip, or electrodes, were a little rounded. Ran to parts store and bought the Autolite 65's. Also a new cap, rotor, and cleaned the K&N. What is causing this to happen to the plugs guys? Am I using the right heat range on the plugs? Also, I've noticed that most of you guys in here are running on average, between 32 and 38 lbs. of fuel pressure. I'm at about 45 lbs., vacuum line off reg. of course. It won't idle worth a crap or even run below 36 lbs. Any ideas on these gremlins guys. Sure is appreciated largely. Peace....... __________________ -87 GT- -SRE 306 c.i. - - JE flat top lightweight pistons and rods\10:25:1- -Moly rings- -Custom Crower cam- -Stage 2 Holley Heads- -Fox Lake ported GT40 intake- -FMS polished alum. tall valve covers- -70 m.m. TB- -73 mm Mass Air /polished- -Mac chrome down pipe- -FMS 24# inj.- -HPC coated Hedman Shorties- -Mac off road X-pipe- -3 chamber Flow Masters- -FMS underdrives- -FMS 1.6 roller rockers- -MSD Ignition and wires- -K&N cone filter- -King Kobra clutch- -FMS 3:73's- -155 lph. fuel pump- -Moroso windage tray- -ARP engine stud kit- -Engine is powder coated red and polished aluminum- -Fiberglass SVO style hood- -'93 Cobra rear spoiler- -Sikkens Pearl white with just a bit of extra blue pearl added- -Lowered 1-1/2"- -Nitrous Works 175 shot- Will install the "juice" come spring.....

04-08-2002, 05:41 PM	#2
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	detonation? I haven't had any personal experience with what you are having. Sounds like detonation though. Do you have pictures of the plugs available for the web? Sounds like you might have to go to a colder range. What is your timing at? Pictures would really help too, there are several smart guys on this site who can tell you much more info than I can. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

04-08-2002, 07:33 PM	#4
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	plug picture... Here's the Chilton's "detonation pic"... __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

04-08-2002, 11:29 PM	#6
Coupe5oh Registered Member Join Date: Nov 2001 Location: SanAntonio, Tx Posts: 734	Well judging from your name i was gonna reply...well you know, but obviously the juice aint installed? How do you like those holley heads? with your setup you should show many blowties the stangin tailights.....good luck Let us know some e.t.'s oh btw, im sure you know, but dont spray 175 shot with that 155 fuel pump, id go with a 190, or 255 to be safe, that would really melt plugs, i seen a little old carbed 302 with e.t. streets lift the wheels with a 175 shot, i'll never forget the black puff he blew out, as he spanked a c5 vette badly.. i'll stop now lol __________________ Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer Race weight: 3,120 E.t-13.57 with 26x10.50's e.t. streets. 1.88 60' mph- 99.92 mph

04-08-2002, 06:06 PM	#3
sprayedstang Registered Member Join Date: Mar 2002 Location: Utah Posts: 5	Thanks for your reply HOZER. I posted this from work. I will get a pic. of the plugs on here a bit later. I did go to a colder plug(Autolite 65). Anyone else?...............

04-08-2002, 11:08 PM	#5
sprayedstang Registered Member Join Date: Mar 2002 Location: Utah Posts: 5	NOT quite that extreme on the meltdown. I've got a week and a half until the opening day of Rocky Mountain Raceway. And I'll be damned if some SS f-body or any other bowtie is gonna show me his *** end at the end of the 1320'. I'll let ya know what transpires Hozer. Thanks for your time and attention to MY problem. This is why I love these types of services. Kool people. Peace........................

04-09-2002, 01:19 AM	#7
sprayedstang Registered Member Join Date: Mar 2002 Location: Utah Posts: 5	Your absolutely right on the fuel pump output. I wont sip on the bottle at full giddyup till I learn to tune, and learn to keep it pointed in a semi straight line(barely do now ). AND drop the tank and do the swap. As far as the bowties,.....this guy around town has a teal '96 SS CRAMaro with some exhaust work and a chip, and he's been pipin me whenever we pass each other and I've just kept my composure,(teeth gritting ), while I was letting everything seat(Moly rings). Well, last weekend we ended up on the same 2 lane road goin the same direction. 40 mph. road. He blips the Borla Y pipe at me to taunt me. Right there I decided that the new powerplant was compfortable enough, and gave him a 3rd. gear hop and he did the same, but did'nt let up. We were off. He had about a car car jump on me. I'm sure all the while thinking he would not be seein me again. I grabbed 4th, and gave him a "bye-bye" wave as I let him get an earfull of X-pipe scream. NOW, he wants me to pull over. So asks me the "WTF have you done to it" greeting. He turned out to be pretty cool all in all though. thanks for everyones (2) replies. Peace.......................