Intake Explosion!?
10-31-06, 05:02 PM
#1
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Intake Explosion!?
ok i was just tryin to start my an it exploded out the intake! It blew hose off the clamp that holds it on flew across the street lucky there was no car at the time cause it had enough force to break a window! what would be causing this??
Note the car is tryin to start but wont
Note the car is tryin to start but wont
Last edited by gus5891; 10-31-06 at 05:05 PM.
10-31-06, 05:51 PM
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do you know how to adjust the timing. i talk to my dad about it an he does not have a clue about rotary engines so i dont know what to do. what could i have bumped or moved that could have mest with the timing
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11-01-06, 06:50 AM
#11
Originally Posted by gus5891
ok i was just tryin to start my an it exploded out the intake! It blew hose off the clamp that holds it on flew across the street lucky there was no car at the time cause it had enough force to break a window! what would be causing this??
Note the car is tryin to start but wont
Note the car is tryin to start but wont
11-01-06, 07:43 AM
#13
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Originally Posted by rx7 FC TII
damn that is insane.......ive never heard of anything like this.....might want to get icemark in here and see what he has to say....
11-01-06, 08:16 AM
#14
I've had this happen to me before, you have to be careful. Did you use any kind of carb cleaner, starting fluid or anything that allows it too pool up in throttle body/dynamic chamber? Anything at all sprayed in there will ignite. I almost crapped myself as I was standing next to it and it poped off, but didnt fly. Tighten the clamp better and try to get it started.
11-01-06, 01:49 PM
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Originally Posted by Anex 570
I've had this happen to me before, you have to be careful. Did you use any kind of carb cleaner, starting fluid or anything that allows it too pool up in throttle body/dynamic chamber? Anything at all sprayed in there will ignite. I almost crapped myself as I was standing next to it and it poped off, but didnt fly. Tighten the clamp better and try to get it started.
11-01-06, 02:34 PM
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i did use a little startin fluid. The clamp that holds the hose on is what flew across the steet. O an the explosion loud enough some of my neighbors came outside to see what happend. An yeah i liked that pic with the cat so no complaints about postin that
About messin with the main pullies.? well lets see i cooked the coolant seals in this engine(i could go about ten miles till it started to overheat) so i pulled it out an put the engine from my parts car in it but i could not test that engine till i installed it so once it was installed it made half a turn an locked up!? so i pulled it back out of the car an put my motor back in (this is my only car) so i needed it back on the road. an i now learn i never should have mest with it in the first place. all i have had is problems tryin to get it back on the road. right now the big issue is vacuum leaks. i'm tired of workin on it so i'mgonna wait an have my dad look at it when he gets home.once he says it looks good i'll put it back together an if it dont work i hope yall will come visit me at the mentall hospital!?
About messin with the main pullies.? well lets see i cooked the coolant seals in this engine(i could go about ten miles till it started to overheat) so i pulled it out an put the engine from my parts car in it but i could not test that engine till i installed it so once it was installed it made half a turn an locked up!? so i pulled it back out of the car an put my motor back in (this is my only car) so i needed it back on the road. an i now learn i never should have mest with it in the first place. all i have had is problems tryin to get it back on the road. right now the big issue is vacuum leaks. i'm tired of workin on it so i'mgonna wait an have my dad look at it when he gets home.once he says it looks good i'll put it back together an if it dont work i hope yall will come visit me at the mentall hospital!?
Last edited by gus5891; 11-01-06 at 02:42 PM.
11-01-06, 10:51 PM
#18
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It has to be ignition timing is screwed or something so wrong it's not your typical problem.
Even if you empty out the entire can of carb cleaner / starting fluid, it's not supposed to backfire like that - stock engine, right?
You need three things to cause an explosion - fuel, air, spark
Air is a given.
Fuel is also a given.
So how do you get a spark outside of the engine inside the intake manifold to cause a BOOM like that?
If the ignition timing is kosher, you can't.
You're cranking the engine and all of that fluid gets sucked into the engine.
The combustion cycle is sealed inside the engine - it can't backfire up into the intake manifold.
This is assuming the ignition timing is good.
Once you get the ignition timing outside of normal spec, then the backfires are pretty easy to do...
-Ted
Even if you empty out the entire can of carb cleaner / starting fluid, it's not supposed to backfire like that - stock engine, right?
You need three things to cause an explosion - fuel, air, spark
Air is a given.
Fuel is also a given.
So how do you get a spark outside of the engine inside the intake manifold to cause a BOOM like that?
If the ignition timing is kosher, you can't.
You're cranking the engine and all of that fluid gets sucked into the engine.
The combustion cycle is sealed inside the engine - it can't backfire up into the intake manifold.
This is assuming the ignition timing is good.
Once you get the ignition timing outside of normal spec, then the backfires are pretty easy to do...
-Ted
11-02-06, 07:35 PM
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Originally Posted by gus5891
i was thinkin it was possible for the timing to off but i have no way to check it cause i cant get it runnin
FSM would show this, and there are a lot of threads which cover this.
The engine does not have to be running.
-Ted
11-02-06, 07:59 PM
#23
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But even if the timing is off, the spark is kept seperate from the intake by an Apex seal isnt it?
In a piston engine this can happen because the timing is way off and is firing the plug while the intake valave is still open. This results in the flame from traveling into the intake and igniting the fuel that is still traveling down the intake.
In a rotary this spark should be kept seperate. Correct me if Im wrong, but the only way I can see this happening is if the timing was off PERFECTLY to ignite the mixture at the last moment before the prot was sealed off.
BC
In a piston engine this can happen because the timing is way off and is firing the plug while the intake valave is still open. This results in the flame from traveling into the intake and igniting the fuel that is still traveling down the intake.
In a rotary this spark should be kept seperate. Correct me if Im wrong, but the only way I can see this happening is if the timing was off PERFECTLY to ignite the mixture at the last moment before the prot was sealed off.
BC
11-02-06, 08:09 PM
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Originally Posted by anewconvert
But even if the timing is off, the spark is kept seperate from the intake by an Apex seal isnt it?
In a piston engine this can happen because the timing is way off and is firing the plug while the intake valave is still open. This results in the flame from traveling into the intake and igniting the fuel that is still traveling down the intake.
In a rotary this spark should be kept seperate. Correct me if Im wrong, but the only way I can see this happening is if the timing was off PERFECTLY to ignite the mixture at the last moment before the prot was sealed off.
BC
In a piston engine this can happen because the timing is way off and is firing the plug while the intake valave is still open. This results in the flame from traveling into the intake and igniting the fuel that is still traveling down the intake.
In a rotary this spark should be kept seperate. Correct me if Im wrong, but the only way I can see this happening is if the timing was off PERFECTLY to ignite the mixture at the last moment before the prot was sealed off.
BC
11-02-06, 08:14 PM
#25
I believe its from incompletely burnt fuel and friction that sets it off. If you notice, all the way to the UIM gets covered in carbon over time from back firing. They use starting fluid for starting, because it is more potent then just gas, and if it pools up, theres alot there left over. It evaporates and is crazy combustible fumes and low flash point. Believe it, because it really happpened to me too, and blew off the AFM from the hose with a flame.
