mk2 1.8t aum engine running issues

[MoMartin]

You checked the spark plugs?

[lewy20004]

yes mate brand new ones.

even put the old ones back in to see if it was the new ones..

[lewy20004]

could be wiring, but you can swap the injector and/or coilpack around to a different cylinder to see if the misfire goes with it to determine that. Compression test results look fairly low across the board to be honest on all 4 cylinders even for a dry test.

yeah i would agree ideally want 180ish i would have thought... but if it was too low across the board surly all cylinders would be faulty

[topher]

either a faulty compression tester or you've slipped a couple of teeth on the belt and twanged the valves, with cyl 3 being the most affected. 95 psi is what i see with cracked exhaust valves generally, tends to be enough to cause a misfire. all guess work though really without having the car infront of me.. still would be worth at this point checking that the timing marks all line up.

[lewy20004]

I have already checked this. and all seems to line up..

I agree with the comp test i thought at first this was low. but ive had a few people saying that its within 10% of each other and the pistons i have maybe why the compression low.

to be honest im just about to quit with it ive only driven it twice and im thinking about breaking it up..... a quick way to loose 5k 

[lewy20004]

i found this today after removing the tape from the coil wiring. as soon as the tape came undone it just popped out.. have replacement on its way