97' GMC K1500 lots of new parts, still wont start. HELP!

[Rob Rowe]

Before I go into this I will give a list of new parts so you have a better idea:

Fuel pump (entire assembly)

Injectors(SFI to MFI)

Fuel pressure regulator

Fuel filter

 

 

I have a 97' 5.7 Z71 that I cannot figure out what to do with. Truck ran fine, then one day had a hard time starting. Then it turned into every single time I went to start the truck I had to sit there and try for 10 minutes or so before it would start. Finally I had to start spraying ether into the throttle body (which I did for too long, but I didn't have a choice) before it would start. At this point the truck has no power - it wouldn't climb any kind of grade, even when doing 70 mph on the freeway it would slow way way down. If I put my foot too far into the throttle, it sounded like I was starving it for fuel and would start to sputter, but if i kept a light foot it seemed to run just fine. Eventually the truck just wouldn't start, even with ether. That has been the case for about 2 months. I have tried everything I know to try. I've checked and rechecked everything I can, and I just do not know what to do.

 

Someone. Help.

 

 

 

Please.

[Rob Rowe]

IF THIS HAS BEEN ASKED AND ANSWERED ALREADY PLEASE POINT ME IN THAT DIRECTION!!!!!!!

[Rob Rowe]

Didn't even think about that. I'll give that a shot!

[Doug_Scott]

Drop the exhaust at the exhaust manifold and see if starts now. Sounds like you have plugged converters.

[Jsdirt]

Yep - that's what I was just gonna say. Plugged cat.

[joefuskie]

Had an 1990 5.7 with a similar issue and it was the fuel pressure regulator. That was a TBI, not sure what the 97's had.

[Jsdirt]

TBI ended in '95. Actually, I should say, it started to end in '94, as a similar CPI system was available in '94 & '95 on certain trucks. '96 and up is all OBD-II - billions of miles of wiring, electronic magic boxes, and a useless EVAP system. Higher pressure FI with that galactically craptastic, expensive, and failure prone spider assembly. Not sure what year ended the reign of the spider ...

 

Another fine example of GM taking something that worked great, and turning into a piece of s***.

 

 

WTF were they thinking here???