Fouled plug #7 cylinder 2 times, why????
04-29-2007, 01:07 PM
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Fouled plug #7 cylinder 2 times, why???? Hey guys I just went out yesterday and ran the bottle for the first time this season and after the first run it started popping a lot so I got home pulled the plugs and #7 was shot the ground electrode was folded over touching the center electrode so I just swapped out all the plugs and went back out did another pull and had the same out come with #7 cylinder spark plug. I have them all gapped at .036, and they are the TR-6 sparkplugs. Last season the car ran just fine on the bottle no issues, the only thing I changed was got rid of my Trueduals with X-Pipe and went to some Dynatech Mufflers right off the headers then dumped. So what is causing this problem? Any Ideas?
04-29-2007, 02:32 PM
#3
Well I am not the plug expert around here, but you may be getting them hot ie: timing, low octane ? Your on the right track though, finding the root cause and correcting. I am sure some of the plug guys will join in as soon as they see the thread. Don't wait for this to happen: 
Robert
Robert
04-29-2007, 06:11 PM
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looks like heat,
is the fuel in the tank from last season??
if so, it may be bad gas.
number 7 is the oneto go alot of the times. i have my theory why, but i wont go there. lol
is the fuel in the tank from last season??
if so, it may be bad gas.
number 7 is the oneto go alot of the times. i have my theory why, but i wont go there. lol
04-29-2007, 06:31 PM
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Originally Posted by Noyzee
looks like heat,
is the fuel in the tank from last season??
if so, it may be bad gas.
number 7 is the oneto go alot of the times. i have my theory why, but i wont go there. lol
is the fuel in the tank from last season??
if so, it may be bad gas.
number 7 is the oneto go alot of the times. i have my theory why, but i wont go there. lol
Nope Fresh fuel I ran a full fresh tank before I sprayed the car. Maybe I should try a full tank of 104 or something to see if it cures the problem. I know about #7 also from 2 of my buddies with 200 shots
Thats why I stayed 150 and hoped for the best!! Any other opinions?
04-29-2007, 07:08 PM
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when was the last time (if any) you had the injectors spray pattern flowtested? #7 cyl. seems to be the one that peeps always have issues with. could br clogged or maybe just to lean for spraying. this is what I would do, flowtest all injectors and the strongest flow install it in #7 cyl. sure there are more ways to go about it but, to detailed..............
fuerzaws6
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04-29-2007, 08:03 PM
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Originally Posted by cowboysfan
when was the last time (if any) you had the injectors spray pattern flowtested? #7 cyl. seems to be the one that peeps always have issues with. could br clogged or maybe just to lean for spraying. this is what I would do, flowtest all injectors and the strongest flow install it in #7 cyl. sure there are more ways to go about it but, to detailed..............
fuerzaws6
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04-30-2007, 08:08 AM
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yhea, run some injector cleaner threw it, see if that helps, i have seen new injectors go wrong with shitty fuel cloging the screens. and when i say shitty fuel i mean right from the gas pumps not from sitting ect.
04-30-2007, 07:39 PM
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For my Goat the #7 was burned because there was a wire that was rubbing things together, not giving it enought clearance, and when more spark was needed, it wasnt there. Youre lucky not to get detonation.
04-30-2007, 10:06 PM
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Do you have any pics of the plugs, both would be best and untouched of course?
Any pics of your setup, or can you tell me how the nitrous gets fuel e.g. running -4 off the factory rail at the test port?
I haven't seen a GS (grounding strap) fold over with nitrous, only times I seen that was on severly boosted engines. I would think there is a cylinder pressure issue, timing, lean, low octane....I mean really most issues are from one of them right Anyway with a nice shot of the plugs I can get you a lot closer. Unless you simply bent the GS while installing, but likelihood, of that happening twice in a row is nil.
Any pics of your setup, or can you tell me how the nitrous gets fuel e.g. running -4 off the factory rail at the test port?
I haven't seen a GS (grounding strap) fold over with nitrous, only times I seen that was on severly boosted engines. I would think there is a cylinder pressure issue, timing, lean, low octane....I mean really most issues are from one of them right
Anyway with a nice shot of the plugs I can get you a lot closer. Unless you simply bent the GS while installing, but likelihood, of that happening twice in a row is nil. 
05-02-2007, 11:01 PM
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Originally Posted by CAT3
Do you have any pics of the plugs, both would be best and untouched of course?
Any pics of your setup, or can you tell me how the nitrous gets fuel e.g. running -4 off the factory rail at the test port?
I haven't seen a GS (grounding strap) fold over with nitrous, only times I seen that was on severly boosted engines. I would think there is a cylinder pressure issue, timing, lean, low octane....I mean really most issues are from one of them right Anyway with a nice shot of the plugs I can get you a lot closer. Unless you simply bent the GS while installing, but likelihood, of that happening twice in a row is nil.
Any pics of your setup, or can you tell me how the nitrous gets fuel e.g. running -4 off the factory rail at the test port?
I haven't seen a GS (grounding strap) fold over with nitrous, only times I seen that was on severly boosted engines. I would think there is a cylinder pressure issue, timing, lean, low octane....I mean really most issues are from one of them right
Anyway with a nice shot of the plugs I can get you a lot closer. Unless you simply bent the GS while installing, but likelihood, of that happening twice in a row is nil.
05-02-2007, 11:02 PM
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Originally Posted by Nitro Dave's Nitrous Outlet
What does your tune up consist of?
Dave
Dave
Dan
