98 Silverado Wont Start

[rbrewste]

I have a 98 Silverado that wont start. I have good fuel pressure Just replaced filter. Thought maybe ignition but I prime with few drops of gas on top of butterfly valve and it fires up. It will run after that I noticed but if it sits 30 or so min. wont start again. So just for the sake of checking I primed again and it ran. put modis on and no codes are on it 9exept for left bank sensor) but that wouldn't keep from starting. I am thinking fuel pressure regulator but don't like to troubleshoot out of my wallet.

[GMstrong]

How much fuel pressure does it have?

[rbrewste]

How much fuel pressure does it have?

 

Looks like 58 to 60psi

[GMstrong]

Im almost postive you have a dis cap if so check the ignition module and coil.

[rbrewste]

Im almost postive you have a dis cap if so check the ignition module and coil.

 

What is dis cap? Also does ignition module tell injectors to open or is it crankcase sensor. I cant figure why it runs after putting gas on butterfly and not another way. Would make sense if ignition module tells them to open. If sensor then wouldn't I get a code.

[txab]

Im almost postive you have a dis cap if so check the ignition module and coil.

 

What is dis cap? Also does ignition module tell injectors to open or is it crankcase sensor. I cant figure why it runs after putting gas on butterfly and not another way. Would make sense if ignition module tells them to open. If sensor then wouldn't I get a code.

 

Distributor cap.......

[GMstrong]

Well if you have good fuel pressure then its the ignition without a doubt replace the ignition module and see where you stand.Theres three major things of a motor in order for it run compression,fuel,ignition fuel pressure is good.Compression must be good if it still has power.ignition needs to be checked.

[rbrewste]

Im almost postive you have a dis cap if so check the ignition module and coil.

 

What is dis cap? Also does ignition module tell injectors to open or is it crankcase sensor. I cant figure why it runs after putting gas on butterfly and not another way. Would make sense if ignition module tells them to open. If sensor then wouldn't I get a code.

 

Distributor cap.......

 

 

I knew that. Sorry for stupid question.

[rbrewste]

Ok I got it I think (too busy to work a lot on it) but I found dist. loose and modis shows -13 turned to zero and waited little bit and it started up. Maybe that was it.

[rbrewste]

Ok I got it I think (too busy to work a lot on it) but I found dist. loose and modis shows -13 turned to zero and waited little bit and it started up. Maybe that was it.

 

Ha ha didn't work.

[00Silverado4x4]

So it runs fine as long as you prime it first? Then won't start if sits for 30+ minutes? Also just replaced filter? I'd go over everything from tank to injectors to make sure something hasn't come loose or broke in your fuel system. Sounds like a matter of loosing prime & air getting into your lines somewhere. Hopefully it's not an external leak & spraying fuel somewhere on you. Good luck.

[avarenal]

I have a 2001 GMC Yukon that has similar problems. If I try and start the truck, it won't. If I turn the key back to starting position (priming the fuel pump), it normally starts (sometimes I have to prime it a 3rd time).

 

Fuel pump changed, fuel filter changed and fuel regulator changed. Have not touched injectors ignition system at all (this does not have dis cap; but individual coils for each plug).

 

Any ideas?