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1992 4.3 sierra wont start unless gas petal to the floor

6197 Views 7 Replies 5 Participants Last post by  Ethan
what could be my issue? it only starts when i have the gas petal all the way to the floor.
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i will have my wife turn the key as i watch when i get home... the fuel filter thats on now looks fresh out the box. but i did use star bright star tron the whole trip home so maybe it cleaned the fuel tank pretty good and clogged the fuel pump. on a side note... symptoms before it started jnot startingk where taking longer to start. hope its not the fuel pump, buy it maybe what you guys think?
Okay guys this is getting interesting... I went outside and wiggled the spark plug wire and the other wires that are connected to the dizzy. It starts every time now, but I did not drive it around to confirm... plus the temp cooled down from 110 that it normally has been to 100 degrees. Sure the outside temp has a bit to do with this but. I will drive it around here in a sec and report back.

---------- Post added at 07:35 PM ---------- Previous post was at 07:34 PM ----------

Oh I had the wife turn the key and the injectors spray just like normal, but we shall see!

---------- Post added at 08:31 PM ---------- Previous post was at 07:35 PM ----------

Well I took it for a drive and it runs a little smoother plus it starts every time. We will see if this continues tomorrow and so forth.
Ok here's the run down of the truck it runs a little ruff, smokes white smoke, yet has good power like it should. The compression test results yeilded nothing lower than 179psi. after taking off the valve covers I saw some of the most buildup sludge I ever saw:( Never the less my dad put some gunk motor flush stuff in...... Why oh Why. The oil pump pick up clogged, so by the time I got to it I thought it was a fuel or trans issue. Pulled the oil pan and oil pump and knock out a hand full of sludge from the pick up screen:( I know that the valve seals need to be changed. I never had an engine that when you take off the valve cover about a quart of oil comes out??? I probed the cylinder head for drain holes and only found some closer to the intake( lookin at the engine head on the highest angle closest to the intake) Thus the reason I say the valve seal are bad.
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