Join Date: Sep 2005
Thanked 228 Times in 170 Posts
ATV: 2013 550 XT
EFI, TPS and DTC code checking plug
So I got my engine all back together (noise is still there...more on that later). But now my engine is really hard to start. Full tank of fresh non-oxy fuel, new plug, and brand new Odyssey PC680 battery. It turns over fine, but turns over for 5-7 seconds before it'll actually fire up. Sometimes it'll almost start, then it just keeps spinning over for another few seconds, then it fires.
Initially I thought perhaps the timing was one tooth off (which it still could be), but once it starts, it runs just fine. Once it starts, I can shut it off, and it fires right back up instantly as it should.
So that gets me thinking maybe the TPS is out of whack with all the shifting/movement going on during the engine extractions/installations (I had 3 of them this summer/fall). Then today I see it was flashing "EFI" on my pod while it was running. It idles and rips around fine. No performance lag that I can tell (haven't done a great deal of riding admittedly, but throttle response seems fine).
So, first question...since my used quad didn't come with that plug to check the codes, is there a home made version a guy can make or is it best to just buy one?
Second, is it easy to adjust the TPS? Seems like it based on the service manual instructions, but I don't want to assume here.
EFI is nice when it's working, but when it's not...I prefer carbs. Likely just because I know them infinitely better than EFI right now admittedly....