keep fouling glow plugs

[cheesecake]

well i just messed with the car and got it running good no problems then it just shuts off. i check the glow plug and it was bad i i put in a new one the car starts up and it runs for a bit then the plug went bad. im not sure what it is the car runs at idle at about 200 and when at wot going down the street reaches 300 wich i know is nbot good ive tried richening it up but i cant get the temps down.

[Meatwad]

air leak? check the tank seal,fuel lines, and exaust coupler for holes

[Meatwad]

what color is the coil on the plug?

[cheesecake]

one of them looked new but the plug was bad the other one was black

[kevinF]

ok have you ever taken this engine apart?? how long are you holding it at WOT for?? does the glop plug jsut last like a half tank, I tank or how many tanks? does it die when your on throttle or when your at an idle?? is the coil spring all pushed inside the glow plug?

[cheesecake]

i took the engine apart 2 nights ago and re assembled it. it lasts about 1 tank now and they go bad and wot is about 8-15 seconds however long it takes me to get down the street

[cr4sh_27]

are you sure you have the right temp. glow plugs

[DAVEC-NITRO-RS4]

Did you seal the backplate on the engine when you re-assembled it?

[kevinF]

i took the engine apart 2 nights ago and re assembled it. it lasts about 1 tank now and they go bad and wot is about 8-15 seconds however long it takes me to get down the street

thats quite a bit long to hold it WOT.

when you disassembled it did you take the piston out and look at it all around the sides and stuff?? any scrathes, gouges?

also these glow plugs that go bad is the coil spring pushed up inside the plug?

[cheesecake]

on 1 of them it was bad i didnt use sealer on the backplate but i used the gasket it came with. how would i get the piston out of the engine and and im using mc59 glow plugs wich is what everyone recomended

[cheesecake]

also i took the head off how should the piston move should there be a little force up top with the head off

[kevinF]

on 1 of them it was bad i didnt use sealer on the backplate but i used the gasket it came with. how would i get the piston out of the engine and and im using mc59 glow plugs wich is what everyone recomended

to take the piston out you ttake the backplate and cooling head off. then you stick a ziptie through the exhaust port, while the piston is at BDC (bottom dead center) then with the flywheel you grip onto the flywheel and turn it till the sleeve pops up and you can get a good grip with yuor fingers are pull the sleeve out. then take needle nose pliers and through the back where the backplate goes you tak the connecting rod off the crank shaft and then turn the engine upside down and let the piston fall out.


when you ready to put the piston back in make sure that the piston goes in the right direction the piston should have one side where it looks like this



Make sure that the paret in the red rectangle is pointed towards the front of the engine, pointed towards where the carb opening is. then lside the sleeve in CAREFULLY so ytou dont scratch it up

[cheesecake]

when i took the head off one of the screws was loose and i cleaned everything and put in a mc9 ghlow plug and it ran great the temps were in the 250-270 range and i hit 290 one time but mostly they were 260-270