Engine woes at the track  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Truggy >> Engine woes at the track
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Engine woes at the track - 6/1/2008 12:14:31 AM   
Nordy


 

Posts: 74
Joined: 2/4/2008
From: Orlando, FL, USA
Status: offline 		Today I took my fine running 8T with my new LRP .28 and Muggy with it's Axial .32 to the track for some fun - both worked fine last week and today they hardly ran at all!!! My 8T took ages to crank up and so did the Muggy and I went through the following:


  • Primed engines
  • Checked Fuel Lines
  • Changes Glow Plugs
  • Changed Glow Starter
  • Checked Throttle & Idle settings
  • Cleaned Air Filters
  • Cleaned out Carb with fuel
  • Checked for pressure leaks on exhaust


    Now am I missing something as both car's have the same problem which is bizzare - normal start up is within 3 seconds of starter kicking on and I completely unimpressed with how 2 great running cars can do this?????

    Thanks
       Post #: 1

RE: Engine woes at the track - 6/1/2008 12:53:59 AM   
hkenvy91


 

Posts: 876
Joined: 4/11/2007
From: richmond, VA, USA
Status: offline 		might have to do with barometric pressure and humidity levels

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       Post #: 2

RE: Engine woes at the track - 6/1/2008 1:25:00 AM   
Nordy


 

Posts: 74
Joined: 2/4/2008
From: Orlando, FL, USA
Status: offline 		I did think that too but a my friends 2 truggies ran fine and we tune ours together.

It's the whole thing about both car's not wanting to start that really ticks me off!!!

(in reply to hkenvy91)
       Post #: 3

RE: Engine woes at the track - 6/1/2008 2:22:09 AM   
INTEGRA



Posts: 1620
Joined: 7/29/2005
From: winnipeg, MB, CANADA
Status: offline 		both doing the exact same would lead me to beleive that something in your prep is to blame...if they both ran fine last week....then what did u change in between last week and this week. ? something must be a miss.....what was the weather last week for fun compared to this week ?

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       Post #: 4

RE: Engine woes at the track - 6/1/2008 3:43:35 AM   
ericem



Posts: 1712
Joined: 1/10/2006
From: Maple, ON, CANADA
Status: offline 		Did you check the contacts on your glow ignitor? I often find them very dirt, and when I test a glow plug in my hand I am hitting it in a different way where it makes enough contact to glow, but when clicked on, it's siitting right in the middle where all the oil residue is built up. I just bring a cloth and wipe the bottom of my glow ignitor and even wipe the tip of the glow plug, not the side in the engine, but where the glow ignitor makes contact with.

(in reply to INTEGRA)
       Post #: 5

RE: Engine woes at the track - 6/1/2008 4:25:48 AM   
Nordy


 

Posts: 74
Joined: 2/4/2008
From: Orlando, FL, USA
Status: offline 		The track temp was a few degrees higher than last week but only by 2 or 3, I tried the cleaning the glow plugs and even installed new ones which made no difference.

When I arrived the 8T fired as it always does (instantly), it cut off half way into it's first tank and that where the problem started with that one. The Muggy just didn't want to fire period! I must be missing something??????

(in reply to ericem)
       Post #: 6

RE: Engine woes at the track - 6/1/2008 4:28:09 AM   
madmax22


 

Posts: 2977
Joined: 9/7/2007
From: Greentown, PA, USA
Status: offline 		are they flooded?

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       Post #: 7

RE: Engine woes at the track - 6/1/2008 4:37:42 AM   
rican25


 

Posts: 451
Joined: 11/12/2007
From: Deland, FL, USA
Status: offline 		did you check your fuel? is it old? contaminated? just a thought....

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       Post #: 8

RE: Engine woes at the track - 6/1/2008 4:42:55 AM   
Jim8ightT



Posts: 92
Joined: 11/15/2007
From: cohoes, NY, USA
Status: offline 		i have had glow plugs that would get too much oil. come to find out it was my glow warmer try to heat the plugs out of the engine...

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       Post #: 9

RE: Engine woes at the track - 6/1/2008 4:49:08 AM   
ericem



Posts: 1712
Joined: 1/10/2006
From: Maple, ON, CANADA
Status: offline
quote:

ORIGINAL: Nordy

The track temp was a few degrees higher than last week but only by 2 or 3, I tried the cleaning the glow plugs and even installed new ones which made no difference.

When I arrived the 8T fired as it always does (instantly), it cut off half way into it's first tank and that where the problem started with that one. The Muggy just didn't want to fire period! I must be missing something??????


That indicates you were runnign to lean, the engine overheated to the point where the fuel boils rapidly. So then you need to wait for the engine to cool down. I mean clean the glow ignitor more then the glow plug.

(in reply to Nordy)
       Post #: 10

RE: Engine woes at the track - 6/1/2008 5:35:04 AM   
kweezinarts



Posts: 267
Joined: 10/28/2006
From: Rochester, NY, USA
Status: offline 		ya sounds like bad fuel maybe, do you use the same fuel for both? try some of your buddies fuel...

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RE: Engine woes at the track - 6/1/2008 2:41:02 PM   
Nordy


 

Posts: 74
Joined: 2/4/2008
From: Orlando, FL, USA
Status: offline 		The fuel does sound like a possible problem as there was fuel left in the tanks as they were not completely empty. I have just bought a new gallon and will try that today and clean the glow starters.

(in reply to kweezinarts)
       Post #: 12

RE: Engine woes at the track - 6/1/2008 4:02:29 PM   
ericem



Posts: 1712
Joined: 1/10/2006
From: Maple, ON, CANADA
Status: offline
quote:

ORIGINAL: Nordy

The fuel does sound like a possible problem as there was fuel left in the tanks as they were not completely empty. I have just bought a new gallon and will try that today and clean the glow starters.


What fuel do you run? My friend had a tank of 20% trinity in his hyper 7 for atleast 8 months, it fired up on the first try, engine was a big gummy nothing wd40 down the carb couldn't fix and a few seconds of high reving

(in reply to Nordy)
       Post #: 13

RE: Engine woes at the track - 6/1/2008 4:38:01 PM   
rckt_mtrspts


 

Posts: 201
Joined: 5/31/2008
From: , TX, USA
Status: offline 		That is your problem. Nitro fuel absorbs moisture over time. Tanks should be drained or emptied after each use. People expect nitros to run like real cars and they do not. Do not get so easily frustrated but instead ask your tuning buddies for prep and afterrun advice as it seems you are not following the basic how-tos.

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       Post #: 14

RE: Engine woes at the track - 6/1/2008 5:39:19 PM   
Nordy


 

Posts: 74
Joined: 2/4/2008
From: Orlando, FL, USA
Status: offline 		I always run Odonnells 20% - I normally go through a gallon within a few weeks as I have 3 cars running on it.

I will always drain the fuel from now on and see what happens.

(in reply to rckt_mtrspts)
       Post #: 15