Engine Revs really high!! Help
 

I recently ran 5 tanks of gas throught my Avalanche. changed glow plug and installed Roto Start. engine now screams and than shuts down. would not start back up. i drained all fuel from tank and blew out lines. any reason why the engine started screaming like that????:eek::eek:

RE: Engine Revs really high!! Help
 

When you installed the roto start did you install the little spring back into the roto start?

RE: Engine Revs really high!! Help
 

yes, after i installed the roto start the engine started it just reves really high and fast. it was like i was giving it full throttle but the servo was not even moving. i had to adjust the throttle servo to 100% no breaks when i first started breaking it in. is it maybe to do with the idle screw. i tried adjusting it but when i adjust it too much to the closed position it cuts off the engine.. any help would be great:eek:

RE: Engine Revs really high!! Help
 

its probebly when you took your engine out, the linkage got in a different place.

RE: Engine Revs really high!! Help
 

i checked the mesh and it seemed fine. should i make it tighter and then see what happens?

RE: Engine Revs really high!! Help
 

he doesn't mean the mesh with the clutchbell and spur he means the position of the servo horn being put on the servo. If you didn't put it in the exact same place, you will have to make some adjustments.

RE: Engine Revs really high!! Help
 

the linkage is still in the same place and i have the throttles dialed to 100% closed and the brake is basically on. when i close the idle any more than it is the engine kept shutting off

RE: Engine Revs really high!! Help
 

then adjust your idle screw so when you apply the brakes, it doesn't close the carb opening.

RE: Engine Revs really high!! Help
 

it doesnt close the carb when the brakes are applied. my problem is the engine is just reving to high and the truck actually goes to take off. i had to snatch it up and use my shoe to clog the exhaust to stop the engine. could there be a problem with the engine.???

RE: Engine Revs really high!! Help
 

that means the idle is tooo high. when you look in the carb therre should be a 1-2mm gap;)

RE: Engine Revs really high!! Help
 

is there any thing else that would cause the engine to rev so high like that because the carb is set to 1.5 mm when closed. are there any other adjustments i can make so the engine does not rev so high at idle

RE: Engine Revs really high!! Help
 

make the ajustment like 1mm. will the truck idle on the ground without moving. it almost sounds like a broken clutchspring. it would only be that if you cant get it to idle slow enof without the motor stalling

RE: Engine Revs really high!! Help
 

Or is it possible the carb is stuck wide open, I know it happened to me it was the idle screw was too far out, but again that was a rotary carb dunno if a slide carb does the same thing. Take off your airfilter and look .

RE: Engine Revs really high!! Help
 

turn down the throttle trim on your remote. or start the car with the servor horn off and adjust the throttle by hand. when you have found a low enough setting put the horn back on the servo and dont forget to put the screw back in. i dint one time and my Tsunami was a rocket with no brakes.lol

RE: Engine Revs really high!! Help
 

I'm going to have to remember that one. Good tip. And lol at the rocket thing hope nothing broke.

RE: Engine Revs really high!! Help
 

if your low end needle is too lean it can cause the idle to raise and have an irratic type of sound.

RE: Engine Revs really high!! Help
 

us Canadians are quick thinkers.lol. i intentionally turned it into a snowbank, jumped a few yards and ended in the nice soft snow. no damage

RE: Engine Revs really high!! Help
 

lol

RE: Engine Revs really high!! Help
 

how would i go about checking if the clutch spring is broke?

RE: Engine Revs really high!! Help
 

you can either take the clutch bell off and see or start the car on a box or something, when you place it on the ground and it stalls most likely the spring is bad.

RE: Engine Revs really high!! Help
 

is changing the clutch bell hard for a noob (as i am one). i dont want to wreck the engine that quick. and how can the clutch spring have gone already i only have 5 tanks of gas through it.

RE: Engine Revs really high!! Help
 

i just noticed its the avalanche, i doubt very much its the clutch spring. Sounds like a tuning issue to me

RE: Engine Revs really high!! Help
 

Think it's possible he may have an air leak? That would cause a similar symptom, wouldn't it? I've just made it common practice to seal up all my motors... thats just me.

RE: Engine Revs really high!! Help
 

so what would you suggest ehroof. i will give you the whole scene as it has unfolded since saturday. saturday i spent the day cleaning my basement and breaking in the avalanche. i would run a tank in my yard area driving the car in figure 8's and half circles at a little less than half throttle. once tank ran out of gas i would let cool down to room temp. After each tank i dropped in two drops of after run oil. Engine never broke 175 degress throughout entire break in. after break in i installed the roto start. yesterday i came home from work filled tank on truck about 3/4 and went to start with roto start. once it started engine began to rev a little high. i dropped the idle down a little and truck stalled. tried to restart and engine started screaming. car started sound like it was full throttle but the servo was not even moving. i lowered idle a little more same thing happened. what else can i adjust to fix this issue?

RE: Engine Revs really high!! Help
 

the low end needle, are you working today? maybe we can meet up or something.