hey whats up dude! yea 15 degrees lastnight. still burnin wood from few yrs ago super dry got the woodstove jammin
Long johns![]()
With an assflap for good measure
got cold lastnight
the absolute worst invasion of fungus gnats ever encountered, sigh.
It truly has been a battle of patience and tenacity.
Presuming the v800 is the petrol one, the fuel pressure should probably track inlet manifold pressure. If the pressure is steady, it could be a FPR failure. Suggesting the fuel rail starts at the black plugged cylinder
The FPR will probably be right at the pump, and have a vacuum hose coming from it to the air inlet manifold/tract.
The general idea is to keep the fuel pressure at the injectors around 43psi above inlet manifold pressure. So the fuel pressure gauge should be showing near 43 at full throttle but maybe just a few psi at tickover. If you have no change in pressure as you open and close the throttle, be sure to look up the FPR as a part for your engine. I feel sure there is one, as running without would be highly irregular.
As you just have two injectors, the fuel rail is probably just a couple of equal length pipes to a T piece. This would make the difference in fueling a little hard to explain. Though that pressure really must track inlet air pressure, so if it's not doing, you could look if the vacuum hose is split or the FPR dirty. 30$ item if it's broke.
I'm not sure what 1200$ CN is, but it sounds a lot. It's very unlikely though. You might loose an injector to a faulty ecu but one up and one down is in-explainable. It just does duty cycle and has no logical reason to treat both injectors so differently.
Of course, the amount of fuel isn't the only reason for unequal burn. The amount of air should also be considered. This appears to be a 4 valve per cylinder engine on a single camshaft, but maybe a rocker has broke. If the air passing through is restricted, the exhaust will be rich. The ecu doesn't know why, as it's a combination of both cylinders. It will reduce fueling to see the reading come back in range. Leaving the good cylinder lean, and the bad one rich. A look down the plughole as you turn it by hand could let you see the valves? Or an endoscope is like 10$ these days. Often called a borescope now cheap enough for such use. It's not twin throttle bodies is it? That would be a bit trick, but another reason for uneven burn.
This sniffing of the exhaust to look at the combined output of both cylinders can cause issue for both quite often. Say one injector was a bit blocked. The overall lean condition would lead to the ecu increasing fuel to both. At some point, one is a bit lean, and one a bit rich, and it's happy seeing the average. That sensor is usually ignored during warmup on a single wire version, but 3 and 4 wire sensors warm themselves so rapidly come online. This info can help with how it looks when starting.