I had same problem with my 1998 4Runner, we installed a different engine in it...... every thing went fine, some how we put the wrong line at the wrong hole..... engine seems like was running on 3 cylinder..... make it short...... I end-up taking to toyota dealer..... it was not cheap.... after that ran like a baber sher... and peace of mind..... bitched about day or 2 about spending that much amount...but than I was happy the way it worked