Whats Your Diagnosis?

[Drifting10]

Ok so i need your help guys and gals. Here's my problem

Thursday i did a compression test on my car for school 155psi in all four cylinders. Put ir all back together and drove it 15 miles home...sat all day in my garage till about noon on friday. Started it up to go to the bank and cash a check seemed fine...got to the bank got out to go in left it running, came back out and i could hear it was ideling very strange and sounded as if it was missing firing on a cylinder... Thought nothing of it and drove home and let it sit till sat.. Started it up everything was fine warmed it up then got on my way to my girlfriends house (2 hours away) about 20 min into my trip i attempted to accelerate around a semi, (NOTE- making 7lbs of boost on low and ~17 on high but always keep it on low) so i give it about 1/4 throttle and im not gaining any speed give it about 1/2 throttle and i start to sped up but it starts jerking a bit again almost like its misfiring a cylinder. So i backedoff and just crused all the way there. Got there my girlfriends dad said to pull it in the garage and we'll check it out. Checked the conectors-fine checked the sparkplugs-fine so buttoned it back up and decided to just baby it home and see how it acts on the way home. Never got on it on the way back to couldnt tell. Got in it again this morning and started it up and let it heat up and got on my way to class. It would drop idle everytime i hit the clutch and came to a stop almost stalling out.

So my question is what do you guys think this is??

For The LazyyyProblem: Making boost-no acceleration and jerky. Dropping idle when coming to a stop. Just sitting it sounds like its missing a cylinder.

Thanks in advance guys.

[mRodiek]

Compression is a little low..but check for leaks? try different plugs as wellwhat turbo do you have on therE?

[Drifting10]

^^^Stock turbo

[Sileighty_85]

Compression is a little low..but check for leaks? try different plugs as wellwhat turbo do you have on therE?

HAHAHA ummmm No. Compression Levels are great.

Do you notice any smoke from the exhaust?Check for Boosts/Vacuum Leaks. Intake and IC pipesCheck for all injectors connected

[mRodiek]

I thought from the factory were like 180? Mine were 165 across. I guess as long as their consistent, and it is a 16yo engine, if your running the stock turbo you should NOT be boosting 17psi!! Blow your turbo quickly...

[hungryjoseph]

155 is a healthy motor. it sounds like to me one of the coil packs went bad. one way to test this is to have the motor running, and disconnect one of them at a time and see which doesn't cause the motor to change behavior. that one is your bad one. I, however, had tried this method and it didn't really help me at all too much. I borrowed coilpacks from my friend's sr and I found out which one was bad that way, and that is the way I suggest you go about doing it. it could also be likely one of your injectors went out but I am leaning more towards the coilpacks, as injectors don't seem to go out on nissans till 100k+