Thread: Engine woes....

So I've noticed my sr20de rr having a rough idle all the time, always at 850rpms but rough. Its been this way since I swapped the sr into by 06 sentra. The engine has 96k on it. It also seems to lose its performance once the engine is fully heated up.

I've replaced the spark plugs, cap, and rotor. Bumped the timing to 19* also. Everything else is stock. No codes, nothing.


Does anyone know what I should check? Anything?

Thanks!!!

Have you modified anything. Intake/exhaust? No leaks? Vacuum?

Nothing is modified. Stock manifold and exhaust. Have not checked vacuum yet. So I don't know of any intake leaks. I know there are a few exhaust ones though.

Check manifold Vacuum at idle. Is it high and steady? fluttering or low?
Check compression warm engine dry cyls.
IIRC minimum pressure is 149psi standard 170-ish max differential 14psi.

850rpm at warm idle.

What should the vacuum be at idle?

Steady and above 15in.hg.

Ok, I'll check this tomarrow. Whats the best location to check vacuum? Also, while its hot, correct.