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K100-forum.com » Technical, repair and troubleshooting » K75 injection fail

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1Back to top Go down   K75 injection fail Empty K75 injection fail Mon Nov 22, 2021 5:00 pm

Gergely

Gergely
active member
active member
Hello, 
K75 ('90, 65k km) while struggling with some misterious engine cranking problem I've also noticed that all 3 injectors are actuated at the same time when engine is cranking (does not start). I guess 3 injectors should follow ignition order (as sparks).  Any idea what could gone wrong causing this issue (EFI, sensors, ...), please?

Thnx.  Greg


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K75 1991
    

2Back to top Go down   K75 injection fail Empty Re: K75 injection fail Mon Nov 22, 2021 6:04 pm

Avenger GT

Avenger GT
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K 75 & K100 injectors are all triggered together. This is normal on early electronic injection systems. They are not very sophisticated. Whatever your problem is, it aint that.

    

3Back to top Go down   K75 injection fail Empty Re: K75 injection fail Mon Nov 22, 2021 7:32 pm

92KK 84WW Olaf

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Avenger GT wrote:K 75 & K100 injectors are all triggered together. This is normal on early electronic injection systems. They are not very sophisticated. Whatever your problem is, it aint that.
Hi Ed good to see you.

The issue seems to affect them all equally so its up the line. My own thought is on it being a 16v temperature sensor in it.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

4Back to top Go down   K75 injection fail Empty Re: K75 injection fail Mon Nov 22, 2021 10:32 pm

Holister

Holister
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What's the "mysterious engine cranking problem"? I think you'll need to be a little more specific.
If the engine cranks but doesn't start, it can be one of three things... air, fuel or spark.
After a failed start pull the spark plugs to check their condition. That will give you a clue where to start looking.

EDIT: Ok I've read your other thread and responded there. Cheers


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1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808		 K75 injection fail Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

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