1983 GPZ 1100 Fouling plugs

Hi guys. My 1100 GPZ takes at least 3 min to warm up with the choke half way up, when it reaches to temp the RPM increaces until I turn the throttle or flick the choke back down.
If I were to ride the bike without warming it up the engine it would bog down when I give it gas/thrttle. this would foul and damp the plugs with gas.
I was wondering if I were to use a DYNA COIL 3 OHM if it would fix this morning start up problem and fix the fouling plugs.
thanks

If after a 3 minute warmup it runs fine I don't think the bike has a problem. Ed

Should not be doing this with the Fuel Injection the lever is NOT a choke but a fast idle lever ??

DFIGPZ wrote: Should not be doing this with the Fuel Injection the lever is NOT a choke but a fast idle lever ??

would the plugs foul by me having the fast idle open on full for the first morning start? When the engine reaches a warm temporature with the fast idle on it revs louder and faster thats when I take the fast idle off.

It sounds to me like an electrical problem but i could be wrong. 3minutes to warm up sounds about right though but if it requires more choke than you think it should that could mean too lean pilot circuit, but that would not explain fouling plugs unless also spark problem.

Do you have the old coils? Replace them!

I assume the plugs are getting wet with gas not oil right?

My bike was fouling plugs i put new coils on it helped but did not fix it, i also put new ign module in and cleaned all my connectors still fouling plugs. I checked the volts at the coil and it is still low (10.5) and my only option is to do the wiredgeorge coil power mod.


I would suggest putting a voltmeter on the coil if possible. Put one on the positive(lower) on the coil and the other to the negative at the battery. Turn key on if your volts are more than 1 volt less than your battery there is an issue.

Good luck! Keep us posted

man-of-war wrote:

DFIGPZ wrote: Should not be doing this with the Fuel Injection the lever is NOT a choke but a fast idle lever ??

would the plugs foul by me having the fast idle open on full for the first morning start? When the engine reaches a warm temporature with the fast idle on it revs louder and faster thats when I take the fast idle off.

Like I stated in my first post if it still has its factory DFI intact the lever only opens the throttle if its fouling plugs first thing I would do is make sure the return fitting in the bottom of tank is not stuck shut from junk.

No the return fitting under the tank on the right side is not stuck shut it's free.

I'm thinking on having the injectors Ultea sonic cleaned and installing new 3 ohm dyna coils.
What's the correct fuel pressour for the 83 gpz 1100 ?

If you have the factory ignition system you do not want 3.0 ohm coils.

DFIGPZ wrote: If you have the factory ignition system you do not want 3.0 ohm coils.

WHY NOT ?

Wouldn't a bigger and stronger blue spark burn the fuel more effectively.
would opening the gap on the plugs help burn off a rich condition??