hey guys just did a head gasket so had everything apart dun dun dun lol anyways I'm very sure I got all the grounds on everything is connected properly when I first start the truck everything runs fine for about 5mins then all of a sudden it sounds like it's missing or timing is off ! I replaced the ignition modual the other night because it would run then cut off and not start then I would key off crank again and it would fire up then die again just curious if anyone has had a problem like this or can point me in a direction thanks 87 blazer tbi 5.7
