Slight vibration after new timing belt install - is this normal?

[Rickjames8]

So after successfully changing my first timing belt ever, I'm pretty pleased with the fact that I got the car back together and got it running.

It started right up, revved nicely, and I took it for a spin around the block and it was smooth. The CEL was on, but it was on intermittently before I did the change (I owned this car for exactly 18 hours before the water pump blew out), so I expected the light to come on.

I got out a paperclip and jumped the proper pins to read the codes and nothing would come up. I've done this on other cars before and was pretty sure I was doing it right. So then I decide to start the car and confirm that the CEL is still on, and it was off. I would think the the ECU would store codes and still display them, even if it was not in a current error state? Is that correct?

Well, I also noticed that the engine seemed to vibrate more than on my test run. Is this normal for a new belt? Does the engine need to recalibrate a bit? I didn't want to drive it further before asking here.

Just for the sake of review, I'll mention that I quadruple checked that my TB lines were matched to the cog markings (not the rear plate markings), and feel confident with the smooth test drive that the teeth are correct. The tensioner was gapped to about 3.6mm, then I waited 5 minutes, spun the crank about 720* and checked it and it was at about 3.7mm. I spun it another 720* and it remained at 3.7mm. I did not change out the oil seals, and therefore did not remove the CAS.

[nissanfreak12]

You still need to time the car. 15° btdc +/-2°. Are you sure your injectors are working properly? do they ohm between 10-14?

To answer your question, no a new belt should not vibrate. When does it vibrate? High rpms, low rpms, all rpms? Does it only do it when moving or stand still, both?

[Rickjames8]

I did not time the car. I didn't know that was a required step. I'll get on that.

I'm not sure the injectors are working right. As I mentioned, this was a brand-new-to-me car (1 day old). The owner was meticulous about maintenance (big stack of records), but driving it home I had a CEL and some erratic idle which didn't show on the test drive. I know one possible cause of the idle are the injectors. I planned to clean the throttle body, IAC, and check o2 sensors first.

The vibration did not seem present at idle, but maybe around 1500 rpms. I didn't rev it higher to see if it persisted through the whole range. Figured it was better to shut it off until I knew more.