Nissan 200SX Club - South Africa

My Problems- When my car idles the needle jumps aroung and the car shakes something like a car with cams on it... do you thing that one of the coils are done....?

Also, I dont have a fifth gear, probably syncro or linkage...

Any contacts for this.....

And theres a small oil leak not sure where from but I dont like it...

Any contacts to get these things sorted?


PS thats not me in the pic, I just thought he is a ladies man...

If the needle jumps its is probably electrical... Chech the battery earth to chassis and engine as well.

Linkage or selector....

The fith gear posibly singcrous but does it jump out of gear or does it just dont wanna go in coils wi be permanent it wont jump around i alsothink its electrical

200SX MP wrote:The fith gear posibly singcrous but does it jump out of gear or does it just dont wanna go in coils wi be permanent it wont jump around i alsothink its electrical

coil issues have been known to manifest only when they get hot. so perhaps not always permanent. but once the coil doesnt work you wont get spark so the symptom will be quite permanent.

misfiring causes the needle jumping and hte engine movement. it also seems like a common trait on these ca18's lately!!!

I've had 2 coils die in the last 3 months...the stupid sh1t

i found a way to wire in 2 pin bosch standalone coils. they give beeeg spark and can be used with stock management.

very nice.

but its over a grand for four i think!

If it is going to be more relieble it is a good idea...I would do it as soon as I had the money and knew it would be relieble.

the coils themselves are very reliable.

my only concern would be that coils only give out as much spark as they're triggered with. and i'm not entirely sure that the trigger signal on our systems would do that!

but on the rotary's they work really well. giving big spark under high boost conditions to very high RPM's!!!

and this way you could mount the coils anywhere and run HT leads to the plugs making life much easier to change plugs and trouble shoot and so on!!!

my only concern would be that coils only give out as much spark as they're triggered with. and i'm not entirely sure that the trigger signal on our systems would do that!

Need Toby to confirm this. I say a trigger signal is a trigger signal. You can use tiny small trigger signals to trigger big things. This is in electronics now. But yes , there can be a spec for that ?

ChemCool wrote:

my only concern would be that coils only give out as much spark as they're triggered with. and i'm not entirely sure that the trigger signal on our systems would do that!

Need Toby to confirm this. I say a trigger signal is a trigger signal. You can use tiny small trigger signals to trigger big things. This is in electronics now. But yes , there can be a spec for that ?

yes i agree - we need an electronics genius to confirm it, but i got that info from another electronics genius buddy of mine,...

perhaps we can pit them against each other in a death match over this???

mowahahahaha

veecee wrote:the coils themselves are very reliable.

my only concern would be that coils only give out as much spark as they're triggered with. and i'm not entirely sure that the trigger signal on our systems would do that!

I think you are right about that one, that is why I had to use two of these babies

The trigger signal from the ECU will not affect spark quality - all it's there to do is turn on the POWER TRANSISTOR (that R4000 jobby perched on the suspension tower). The power transistor then turns that signal into a nice big voltage spike that the coil then converts into thousands of volts for the good 'ol spark plug.

SO, in summary, your spark "quality" if we can call it that, will be affected by the coil (in theory, it could short a few coils out and hence reduce efficiency, but I doubt that happens in practise) and pretty much nothing else. If the power transistor is dead, it's dead. It's not gonna half work. The coil could be intermittent, but generally it's also either ON or OFF. The rest is all in your head

And the pic from vlade is a different form of power transistor/amplifier.
A transistor is an amplifier.

Chem

so in lay terms, if you tried to trigger the coil with 12v it would give the same output as if you tried to trigger it with 120v???

Correct VC.