Engine dies when ignitor is removed
08-14-2003, 11:25 PM
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Engine dies when ignitor is removed
The engine in my Tower hobbies St-15 dies when I remove the glow starter. It will run fine in idle or revving the throttle, but as soon as I remove the ignitor, BAM (Madden like) it dies, not slowly either, right away. Does this mean my plug is bad?
08-15-2003, 01:15 AM
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Engine dies when ignitor is removed
I had the same problem with my car. My problem was not anything like glow plug or anything (that why I took me a LOT of time to find)
The head of the engine what not tight enough thus having an air leak. Also the glow plug was not very tigh so it might had been that also. Tighten up everything on the engine also tighten up the tiw wrap that hold the elastic tube on the exaust as usually you dont get nive airtight connection.
If nothing of these work post agina to figure it out. (it may be something strange..........you never know with RC car
)
The head of the engine what not tight enough thus having an air leak. Also the glow plug was not very tigh so it might had been that also. Tighten up everything on the engine also tighten up the tiw wrap that hold the elastic tube on the exaust as usually you dont get nive airtight connection.
If nothing of these work post agina to figure it out. (it may be something strange..........you never know with RC car
)
08-15-2003, 02:00 AM
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Engine dies when ignitor is removed
Originally posted by gmac4826
where did you get your avatar, ibrc
where did you get your avatar, ibrc
08-16-2003, 01:02 AM
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Engine dies when ignitor is removed
Well, I bought a new plug OS A3, and I am still having the same problem of the engine quitting after removing the ignitor. I may have to go and tweak the carb some more, I don't know, ignitor also died...recharging as I write this.... Does anyone have any other suggestions?
08-16-2003, 04:49 AM
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Engine dies when ignitor is removed
Dying, the instant the ignitor is removed, is normally due to only a limited number of things:
Mixture is too rich.
(lean it out some and try it again. The *most* common problem by far)
Plug is shot, or too cold for the nitro % or compression ratio.
(Try a new plug, as you already did... and/or try a hotter plug. [OS 8])
Fuel is weak, or has too little nitro.
(Try a new gallon of fuel, as you already did... or try a fuel with more nitro)
Compression ratio is too low, or there are compression leaks
(Check head bolts... remove shims if present. Could also be scored piston/liner)
Generally though... if it runs well with the ignitor on, you can usually nail it down
to "rich fuel mixture at the needles"/fuel quality/plug pretty quickly.
If you continue to have problems, seek out the local engine guru
Mixture is too rich.
(lean it out some and try it again. The *most* common problem by far)
Plug is shot, or too cold for the nitro % or compression ratio.
(Try a new plug, as you already did... and/or try a hotter plug. [OS 8])
Fuel is weak, or has too little nitro.
(Try a new gallon of fuel, as you already did... or try a fuel with more nitro)
Compression ratio is too low, or there are compression leaks
(Check head bolts... remove shims if present. Could also be scored piston/liner)
Generally though... if it runs well with the ignitor on, you can usually nail it down
to "rich fuel mixture at the needles"/fuel quality/plug pretty quickly.
If you continue to have problems, seek out the local engine guru
08-17-2003, 01:49 AM
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Engine dies when ignitor is removed
Well, good news, I got the truck running after all. I went through the manual on adjusting the needle settings and tweaked it a little lean and it runs great. Thanks for your helpful info guys! But...it seems to accelerate slowly and then hit top speed. Is this normal, or is there some adjusting I can do. I had to replace the spur gear, is it not tight enough, or is there something else I am missing. I ran about three tanks through it and with each tank it was running better and better, until the fourth tank, I had trouble starting it, thought maybe it was my ignitor, I finally got it started, but it ran at slow speed even with the throttle all the way open, it ran this way until the tank was empty...weird. I'll have to figure something out tomorrow...getting late and I don't want to get frustrated. Again, thanks for your help on helping me get this running and also in advance for my situation.
I smelled Nitro... and I liked it!
I smelled Nitro... and I liked it!
