Engine Running Poorly in Riot
I am at my wits end trying to figure out what is wrong with my Riot. Here is the background as well as what I have checked thus far.
Around the first of November, I took the Riot out for two days worth of riding. Day one was perfect. No issues. Day 2, I started to notice, during steady, mid-throttle it would seem to bog and then recover quickly. Something like a bog in the 1 to 2 second range. I could tap the throttle a little and it would seem to recover. This was while running, constant speed (maybe 40 mph) with a mid to low throttle. Just crusing along.
I hadn't run it for about 2 months. And decided to take it out again at the end of December around the house (in the desert). It ran well in the beginning. But within about 20 minutes, I could tell it was getting worse. The bog under part throttle, steady was getting worse. It would clear when it was wide open throttle. Another 30 minutes go by and it is getting worse. Now wide open throttle is no good any more. And when jumping on it, it bogs really bad and I have to kind of feather the throttle to get it to come back. AFter about an hour of this is it so bad that I can't get it to go over 5000 rpm. So I can't get any speed or acceleration out of it. I limp it home doing about 20mph all the way home and barely make it home.
> Pulling it into the garage that day I could tell, while idling, it was running really rich.
> I removed the fuel pump and checked for sand, dirt, etc. No signs of crud. Put fuel pump back into the rig and started up. No difference. Running bad from the start.
> I replaced the fuel filter. No change.
> I checked the MAP sensor. It was dirty. I cleaned it with rubbing alcohol and a quetip. It went from black to that yellowish color. Reinstalled......no change.
> I got a new MAP sensor from a buddy here in town (thinking maybe the sensor was just bad, even though it ohm'd out per the service manual just fine). No change.
> I ohm'd out the fuel injectors. All good there (14ohms) on both. Book says 12ohms, but........as they are both the same, I figure they are good.
> I removed both plugs and inspected. They were wet......but not black. All looked ok with them and were gapped correctly.
> I ohm'd the coils, they were within service manual spec.
> Removed connector to computer and reinserted. No change.
> cleaned Air filter. It wasn't dirty........No change.
> I tried to check the cam sensor output. I couldn't seem to get the +5V variation when turning the engine over as the service manual says. But I figure that you can't get 5V out of it without the harness attached. Am I wrong?
> I have disconnected the MAP sensor's connector. It runs the same with and without it attached...........shity!
> I have reconnected the MAP sensor and disconnected the cam sensor. It runs the same with and without the cam sensor attached. Shity! And same as when I pulled it into the garage.
This is where I am at thus far. It's almost acting like it's in a "limp mode" whereby it is ignoring sensors and just going to a default setting. I say this because it seems to ignore any sensor I disconnect. But who knows.
I do not have a check engine light (the seperate one, not part of the tach) installed. I have one coming from RRR to see if it is lit (guess I could have done this with a volt meter on the wires, now that I think about it. I will check this tonight).
You guys got any thoughts? Wish I had someone local with the software and a computer to tap into the ECU and see what it is saying.