Printer will not feed paper correctly

Question

The paper starts to feed then it gets pulled in on the right side and the left side does not feed in. I get an error E-90 then a clear paper jam E-04 - there is not a paper jam?I fixed the "cover open" problem I had by taking apart my printer (hp x3470). Now the paper will only feed on the right side and the left side builds up a bulge and it all jams. HELP! Thank you!