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2g Manifold capacitor part?

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my_gst95

20+ Year Contributor
569
10
Nov 13, 2002
Sacramento, California
Well, i'm not 100% sure its a capacitor, but... There is a silver round piece that looks like gets grounded on the intake manifold of a 2g. I did a 6bolt swap and must not have tighten it down properly, and because it was lose, it was causing my IGN fuse to constantly blow. I removed it and the car runs fine now. What is it for and can I run without it?

my_gst95
 
Solution
It is called a condensor it is there to absorb the large amount of voltage that a large inductor will create when the current throught is changed rapidly. I would make sure it is on there for your ecu's sake. basically V=L (di/dt) so say your coil has an inductance L of .5 henri's and it has a resistance of 3 ohms, it will be flowing 4amps through it when it is flowing. sudenly this current is shut off. (very large di/dt) say it takes .001 seconds for the current to goto 0. then di/dt is 4/.001 which is 4000 amps per second so if we put this into our earlier equation we ha V=.5*4000. so V=2000 volts presented to the output transistor on your ecu. coincedently those only are rated for around 100v obviously it won't last long like...
thanks would this prevent the fuel from getting to the engine. after i put the motor back in the car i can't get fuel to the motor. i know this because i tried start it for about an hour then i put alittle fuel in all 4 cylinders and it fired right up then died when the fuel burned off. i also took off the fpr and turned the engine over a fuel come out but the fpr and also it was not under pressure when i took it off like when i took the engine out.
 
thanks would this prevent the fuel from getting to the engine. after i put the motor back in the car i can't get fuel to the motor. i know this because i tried start it for about an hour then i put alittle fuel in all 4 cylinders and it fired right up then died when the fuel burned off. i also took off the fpr and turned the engine over a fuel come out but the fpr and also it was not under pressure when i took it off like when i took the engine out.

Did you check the MPI fuse?
 
pull the fuel rail and leave the injectors pluged in and see if they squirt fuel out(put a bucket or something to catch the fuel)
 
hahahahahahahahaha i made the same post about a month ago someone up there ^^^^ hit it on the nose its a noise condenser not needed unless you as the driver feels the cant enjoy their ride which we all expect anyways right:p
 
aaaa i see well i got that problem solved now i believe that the fuel pump is out took off the fuel rail, turned the car over and no fuel comes out of the injectors. then i took the fpr off, turned the car over and no fuel came out. what do u guys think and if it is the pump what pump to go with?
 
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