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5.7 gsi bogging down ***UPDATE***
https://www.smwebhead.com/phpBB3/viewtopic.php?f=11&t=14131		 Page 1 of 1
Author:  Rick2752 [ Mon Jun 15, 2015 9:37 am ]
Post subject:  5.7 gsi bogging down ***UPDATE***
Any ideas? New anti siphon, new motor, new distributor, plugs, wires, new fuel hose to tank. The funny thing is if I idle out of marina and try to take off, it will bog down. If i shut it off then restart it will be fine. My next thing is to take out the high pressure pump and look at screen. Any more ideas?
Author:  702Steve [ Tue Jun 16, 2015 6:00 pm ]
Post subject:  Re: 5.7 gsi bogging down
I had the same problem. I too would idle out and when we gave it throttle it would bogg down. Mine was related to vapor lock and my VST. My mechanic cleaned out my VST and so far so good. Also check if you pinched a spark plug wire.
Author:  Rick2752 [ Wed Jun 17, 2015 11:44 am ]
Post subject:  Re: 5.7 gsi bogging down
I dont think I have a VST. Is a 2001 model. If I do I dont know anything about it. It is a TBI Model 5.7 GSI pefs
Author:  Rick2752 [ Mon Jul 20, 2015 7:53 am ]
Post subject:  Re: 5.7 gsi bogging down
Update...

I finally broke down and bought a new high pressure pump. It seems to have fixed the problem. Here is procedure

ImageFuel6 by rick oeder, on Flickr
Here is inside of old pump. The screw was epoxied closed but i used vicegrips to take it out, unplug harness and pulled right out. You can see the build up in the screen. I thought about cleaning it but i already have the pump and I am tired of working on it. Also the mesh isnt nearly as fine on the new one.
ImageFuel2 by rick oeder, on Flickr
Old pump cleaned up as a spare.

ImageFuel1 by rick oeder, on Flickr

New screen much better
ImageFuel3 by rick oeder, on Flickr

ImageFuel4 by rick oeder, on Flickr

Swap the ends as new pump didn't come with schrader valve to bleed.

ImageFuel5 by rick oeder, on Flickr

All finished, runs a ton better now. Ready for some Lake Erie perch.
Author:  LouC [ Mon Jul 20, 2015 8:02 am ]
Post subject:  Re: 5.7 gsi bogging down ***UPDATE***
Nice work Rick!
I'm thinking of buying a spare mechanical pump for my old OMC; the original pump is still on there....
Author:  GottWhat [ Mon Jul 20, 2015 9:11 am ]
Post subject:  Re: 5.7 gsi bogging down ***UPDATE***
Awesome, that has to be a major relief! Great photos.
Author:  Rick2752 [ Sun Jul 15, 2018 3:09 pm ]
Post subject:  Re: 5.7 gsi bogging down ***UPDATE***
3588865. Michigan motorz is where I bought it. High pressure side only. 200 dollars
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