IAC ( idle air controll ) sensor....
or so im being told...could just be
cleaned out..have to give it a try.
We use Ring Free, in an F115, as recommended by Yamaha. It definitely works. We had a rough running motor that 1 bottle fixed. Now we use it regularly.Maybe not the right place for this question, but somewhat related.
Anyone use Yamalubes Ring Free product in their fuel? Is this snake oil or does it actually work? I have heard it can really clean out any gummed up residues causing poor performance.
Guessing this wouldn’t help with this issue above but I noticed some seafoam comments and thought I’d ask about ring free. Thx
We use Ring Free, in an F115, as recommended by Yamaha. It definitely works. We had a rough running motor that 1 bottle fixed. Now we use it regularly.
On my Merc - Its just a schrader style fitting.. You can get greenline hose to put a 100lb gauge and schrader male fitting together for like 15 $.. instant fuel pressure gauge.Well that wasn't it. Looks like there are
A few things on the list..
Does anyone have a fuel pressure
gauge...?
In my case. The coils still fired.. just not as strong? Id guess. They still all worked. But idle was lumpy. Fine at speed.Start with the simple stuff first. With insulated plyers made for this job, pull a spark plug wire off the plug one at a time with the engine idling. If you pull one off and the motor runs worse...you know that one is working. If you pull one off and there is no change...it isn't firing and you have isolated it to that cylinder or that coil, or that injector.
I am keying in on the fuel system. I ve had these odd hiccups in the past but appear
To get worse over time. Becoming a PITFA.
I'm now taking a hard look at the vapor trap and low pressure pump.
So I would be able to screw any air pump
Up to this that has a shreader valve.?
The motor runs fine at first then slowly
Gets worse as the day progresses.
Got to be a dirt / pressure thing and
Appears to be a common issue.
600 hours now and otherwise been
A great addition