Low Fuel Pressure and Cylinder 3 Misfire Codes P0300 and P0303

[BoldlyGoing]

So, after months of weird stuttering under acceleration, and occasional obvious misfires, my LJ is finally spitting a code (or rather 2).

P0300 and p0303.

Now, in addition to the symptoms mentioned before, I've noticed in the last few days that the engine will "stick" at ~1000 rpms or so till I tap the throttle.

I've seen that that the 0300 can indicate a vacuum leak. Am I correct in thinking that might also cause the high idle?

Should I maybe start there?

 

[Chris]

Absolutely a vacuum leak can cause a high idle. That's the first place I'd look.

Since those vacuum leaks can sometimes be near impossible to spot, I'd try a smoke test if you don't find it initially with your naked eye.

 

[BoldlyGoing]

Absolutely a vacuum leak can cause a high idle. That's the first place I'd look.

Since those vacuum leaks can sometimes be near impossible to spot, I'd try a smoke test if you don't find it initially with your naked eye.

Just what I want to spend a weekend doing