i bought a 94 Burb.....it didn't have a IP.....so i took the IP off my 95 Burb that caught fire and put it in the 94.....it's a dog,rev's slow and rattles when idling.....there are no codes fuel pressure is 7psi at idle and 4 at WOT......is the 94 ECM mad at the 95 IP?...there is no blowby at...