Fuel injectors.

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Gowing
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Fuel injectors.

#1

Post by Gowing »

Not vintage motorcycle related, but very important for all injected computer controlled combustion engines.
Out beautiful cayenne had piston scoring (sob). I may have contributed to problem by not using injector cleaner enough. When injectors get clogged, the spray washes the cylinder walls. Rings and pistons fail, cylinders get scored.
https://www.callasrennsport.com/blog/po ... re-scoring
Dave

1975 GL 1000
1980 XS650
1981 ct110
1972 F7 KAW 175
2000 moby blaze 40cc
Chihuahua (Ellie)
Chihuahua #2(Blaze)
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gltriker
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Re: Fuel injectors.

#2

Post by gltriker »

Okay Dave this Topic caught my attention . I've been watching Jake Raby talk about Porsche engines For the past 3 or 4 hours on YouTube !
Are you going to send your vehicle to his shop in Georgia?

I wonder how many HUNDREDS of times he said the words, Bore Scoring. :shock:
Cliff (74yrs ;) )

Keep your eyes and ears open and you'll learn something new, everyday. tumb2

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RE: a thorough fuel tank cleaning
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Cliff

'75 GL1000 home built trike; http://www.ngwclub.com/forum/viewtopic.php?f=30&t=39996
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previous rides:
1953 H-D Servi-car, naked, 1969-1978 (serial#53G1559 committed to memory!)
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Gowing
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Re: Fuel injectors.

#3

Post by Gowing »

We sold wife’s cayenne years ago. Porsche refused to help any of the hundred of cayenne and 911 owners with recall. Many think the scoring is caused by batches of bad pistons Porsche used. There was said to be a problem with the Nikasil piston coating. Rebuilders were finding chunks in combustion chambers. But a clogged injector washing the cylinders makes sense. The Porsche scoring is almost like an oil thread at this point. I should say that it only affected 2003-2004 model years I think.
Dave

1975 GL 1000
1980 XS650
1981 ct110
1972 F7 KAW 175
2000 moby blaze 40cc
Chihuahua (Ellie)
Chihuahua #2(Blaze)
Don R
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Re: Fuel injectors.

#4

Post by Don R »

I've noticed more injector trouble when burning grocery store gas station gas. Name brand with additives is worth the extra cost. My 8.1L gmc dually is particularly prone to check engine lights with plugged injectors. It's hard to drive on by the cheap gas when the wife got 50 cents or more a gallon off at checkout. Saves enough to pay for the Lucas injector cleaner.
Probably time for a dose in her Accord, I notice the gas mileage is falling off a bit.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.
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