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my 91 lx has a 87 gt cobra swap, when started you have to pump the gas alot, and it backfires in the intake, once its warmed up a little its fine, dunno what to look for, someone says its maybe running really lean but dunno
1st off they didnt offer cobra's until 93' but anyways..... i would check the timing to start off and then go from there... running lean could be a possibility, but everything will be out of whack if the timing is off....
sounds like you got probs you shouldnt have to pump the gas to start it unless you stuck a carb on it the back fires probally timing related and yeah there is no such thing as a 87 gt cobra.
ok well its an 87 5.0 from a gt, and a cobra intake, the fuel pump sounds preety load too, i guess its normall though, but yeah timing is first on my list ill do that when i get of work today