What could cause an engine to not idle when it's warmed up?
#1
What could cause an engine to not idle when it's warmed up?
I'm pretty sure it's just shot but I want to be sure I'm not missing something. Is there something I could be doing wrong tuning wise? It runs great, plenty of power, just won't idle once it gets around 200 degrees.
Could a different plug help?
Could a different plug help?
#2
Try turning up your idle speed, it's normal for the speed to drop some when the engine gets warmed up.
#3
how is the compression when engine is warm??
Normally if an engine has had plenty of use and wont idle or start once warm then its had its day. Either renew certain parts or get rid
Normally if an engine has had plenty of use and wont idle or start once warm then its had its day. Either renew certain parts or get rid
#4
#5
With the engine warm, remove the glow plug and rotate the flywheel. How much pinch (resistance) does it have?
Engines have less pinch warm than cold.
When an engine loses it's pinch, the 1st thing to happen is stalling/poor idle.
A piston/sleeve set will renew your engine, if all the other internals are ok.
Engines have less pinch warm than cold.
When an engine loses it's pinch, the 1st thing to happen is stalling/poor idle.
A piston/sleeve set will renew your engine, if all the other internals are ok.
#6
#7
No idea, it's used, came with the RC8 I just picked up. It's a GB .21 something or other. Says made in italy on the back plate. I've never heard of them. The guy I bought from says it's a rebadged nova P5. I'm skeptical.
#9
GB .21?
probably best you just buy a new engine mate tbh.
probably best you just buy a new engine mate tbh.
#10
Tech Master
iTrader: (4)
With the engine warm, remove the glow plug and rotate the flywheel. How much pinch (resistance) does it have?
Engines have less pinch warm than cold.
When an engine loses it's pinch, the 1st thing to happen is stalling/poor idle.
A piston/sleeve set will renew your engine, if all the other internals are ok.
Engines have less pinch warm than cold.
When an engine loses it's pinch, the 1st thing to happen is stalling/poor idle.
A piston/sleeve set will renew your engine, if all the other internals are ok.
Furadi: are you sure it doesn't say BP on the back. They make offshore racing engines, but also nitro model engines. A bud of mine was sponsored by them a few seasons back. He got 20 gallons out of his last engine from them.
#11
Tech Initiate
send me the piston and sleeve and I'll pinch it for $10.
Over the years I been Pinching Sleeves and machined ever pinch specific tool out there from XTM to NovaR. Anyway, I probly already have the tool machined for that motor as many of the sleeves are the same Diameter.. Anyway if your interested email me and ill send you my home address and #. unless you have a bent rod or major air leak(check the front bearing seal) it is the Piston/Sleeve.. [email protected]
#12
Think I have it sorted out. Turned up the idle a bit, fattened up the bottom and leaned out the top. It will idle now for a good bit instead of dying when I let off.
#13
Tech Regular
iTrader: (12)
With the engine warm, remove the glow plug and rotate the flywheel. How much pinch (resistance) does it have?
Engines have less pinch warm than cold.
When an engine loses it's pinch, the 1st thing to happen is stalling/poor idle.
A piston/sleeve set will renew your engine, if all the other internals are ok.
Engines have less pinch warm than cold.
When an engine loses it's pinch, the 1st thing to happen is stalling/poor idle.
A piston/sleeve set will renew your engine, if all the other internals are ok.
#14
Tech Regular
iTrader: (12)
You could have started by leaning the low end by one hour or two, this would have naturally raised your idle and you may have been all set. Pinch Test and plug reading can help you here. Instead, you richened your low speed, this will slow the idle down because more fuel is allowed into the combustion chamber putting more of a load on the piston. If you had an idle problem before and than you richened low speed you definitely would have needed to turn up the idle screw to compensate. In my eyes, you are worse off than where you began when you first started this thread. Leaned the top end, why? Why didn't you just start by turning up the idle screw? Time to get lost in the sauce...Read the tuning bible and pay close attention to the first part of it. Let us know how it goes.
#15
Not to throw any sticks in your spokes but you may want to read through this: http://www.rctech.net/forum/nitro-of...ing-bible.html
You could have started by leaning the low end by one hour or two, this would have naturally raised your idle and you may have been all set. Pinch Test and plug reading can help you here. Instead, you richened your low speed, this will slow the idle down because more fuel is allowed into the combustion chamber putting more of a load on the piston. If you had an idle problem before and than you richened low speed you definitely would have needed to turn up the idle screw to compensate. In my eyes, you are worse off than where you began when you first started this thread. Leaned the top end, why? Why didn't you just start by turning up the idle screw? Time to get lost in the sauce...Read the tuning bible and pay close attention to the first part of it. Let us know how it goes.
You could have started by leaning the low end by one hour or two, this would have naturally raised your idle and you may have been all set. Pinch Test and plug reading can help you here. Instead, you richened your low speed, this will slow the idle down because more fuel is allowed into the combustion chamber putting more of a load on the piston. If you had an idle problem before and than you richened low speed you definitely would have needed to turn up the idle screw to compensate. In my eyes, you are worse off than where you began when you first started this thread. Leaned the top end, why? Why didn't you just start by turning up the idle screw? Time to get lost in the sauce...Read the tuning bible and pay close attention to the first part of it. Let us know how it goes.
If it's running good now does anything else really matter?