Heya, so I'm fighting a no-start issue on my truck, a 98 k1500 5.7 with 170k miles. Short version of the back story is it overheated and blew the back passenger lower intake manifold gasket out. Replaced it but did not get it sealed well enough and still leaked a little so took it apart for round 2, then it got severely back burner-ed and sat for about 7 years. Just finished putting it back together and now it doesn't want to start.
I've gone back and reset the distributor with #1 tdcc to ensure that was good, drained all the gas out the tank (had over 15gal...) and put a little fresh in, changed fuel filter, also had to replace fuel pump. I have tested the fuel pressure at the port, 60 on prime and drops back to about 50 after the pump stops and stays there pretty well. With just regular cranking it turns and will rarely catch for about 1/4 second but fail and keep cranking. If I spray some starting fluid in the tb it will fire up but limp down quickly until the fluid is gone after about 1-2 seconds. I haven't yet been able to do an actual spark test (waiting on it to arrive from amazon), but since it at least kind of runs on the fluid I was thinking the spark should be ok (the plugs/wires are probably less than 20k old, the cap/rotor button is essentially new aside from just sitting). And since the fuel looks correct on the rail I was kind of suspecting a stuck/clogged spider? Would it be possible to remove the upper intake and reconnect the fuel lines and pull the injectors out to verify during cranking they are all squirting (with ign fuses removed probably)? Is there something else I can look at for a culprit?
I've gone back and reset the distributor with #1 tdcc to ensure that was good, drained all the gas out the tank (had over 15gal...) and put a little fresh in, changed fuel filter, also had to replace fuel pump. I have tested the fuel pressure at the port, 60 on prime and drops back to about 50 after the pump stops and stays there pretty well. With just regular cranking it turns and will rarely catch for about 1/4 second but fail and keep cranking. If I spray some starting fluid in the tb it will fire up but limp down quickly until the fluid is gone after about 1-2 seconds. I haven't yet been able to do an actual spark test (waiting on it to arrive from amazon), but since it at least kind of runs on the fluid I was thinking the spark should be ok (the plugs/wires are probably less than 20k old, the cap/rotor button is essentially new aside from just sitting). And since the fuel looks correct on the rail I was kind of suspecting a stuck/clogged spider? Would it be possible to remove the upper intake and reconnect the fuel lines and pull the injectors out to verify during cranking they are all squirting (with ign fuses removed probably)? Is there something else I can look at for a culprit?
