Thread: What's a GOOD Fuel Injector Cleaner for Petrol?

Originally Posted by 4bee

Idle Air Control.

ahaaa!......kool!.....thanks!

If you have a look in a plenum chamber it is full of crud. Engines breath back into the plenum, and IACV . If you ever have a small backfire it will add to the carbon.
have you never seen the pictures of a fuel mist sitting outside a carby inet or backfire flames.
And quite a bit of oil mist also hangs around there.

Injector cleaners only clean injectors and downstream, Maybe inlet valves.maybe not too! They will have no effect on exhaust valves .
The cleaner will have little or no effect on the throttle butterfly and around there.
regards Philip A

Originally Posted by PhilipA

If you have a look in a plenum chamber it is full of crud. Engines breath back into the plenum, and IACV . If you ever have a small backfire it will add to the carbon.
have you never seen the pictures of a fuel mist sitting outside a carby inet or backfire flames.
And quite a bit of oil mist also hangs around there.

Injector cleaners only clean injectors and downstream, Maybe inlet valves.maybe not too! They will have no effect on exhaust valves .
The cleaner will have little or no effect on the throttle butterfly and around there.
regards Philip A

I guess I never really thought about it properly........however I would have thought [provided that air filter is good] that air passages should be clean!.....why should the plenum chaber have crud in it?......

Does anyone here know of the pathway/s that the PCV fumes go through in these engines after the two hoses join into the air manifold base......looks like I'll have to get out my manuals and look it up......I've honestly never really thought much about it!