Question about Cars & Trucks
Start by checking the existing settings of your air adjusting screws (the two in front). you do that by turning the screws one at a time in (clock wise) at one half turn at a time until they stop. should be appx. 1 1/2 turns. Be sure to jot down how many turns it took so you can put them back if need be. Now set both at 1 1/2 turns out (counter clock wise) NOTE. Do all this with engine off...... Now start engine and turn screws out slowly one at a time about 1/2 turn then in until you hear the engines RPMs start to drop then turn out again 1/4 turn. Now your air/fuel mixture should be as close as your going to get it without a dino machine
Posted on Jan 03, 2013
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Posted on Jan 02, 2017
SOURCE: 1985 gmc sierra shakes
Sounds to me to be a timming issue like maybe retarted, also chk. to see if the wire is pluged in by dist, the wire that you have to unplug when your going to time it, i can't remember what its called. There is only 2 things on this truck thats controled by the computer is spark and fuel, if that wire is unpluged by dist. it will run like that, unless someone has changed it back to the old style dist. and carb. if thats the case loosen dist. and move it a little and see if it dosent run better, clockwise advance, counter clockwise is retarded.
Posted on Feb 26, 2009
i dont know of any recall for that
and yes it can be replaced without removing the bedeasy wasy too do it is go too auto zone and buy a roll of brake line and run it along side of the old one and just leave the old one in the hangers and use tie straps too hang the new one!!!
Posted on Apr 20, 2009
SOURCE: smoking 305 motor
Time to rebuild the engine. Your piston rings, main bearings, connecting rod bearings, camshaft bearings, and valve guides in the cylinder heads, are worn out. Possibly the shafts are worn on the valves, and the piston skirts also. (Means new valves, and pistons, plus boring and honing the block. You'll need a new oil pump, gaskets, freeze plugs, spark plugs, oil and filter, for a few more things to add to the list)
What you are seeing is called 'Blowby'. This is a normal thing with a worn out engine.
Also replace the PCV valve as it is probably clogged up. (Positive Crankcase Ventilation Valve)
Posted on Sep 02, 2009
Check your ignition timing at 3500 rpm you should have about 40 degrees of advance If not, something is sticking in the distributor, either the vacuum or mechanical advance. This will cause a big reduction in fuel economy. Also, check your tire pressure. The cfm on a rochester is really not important. The primary bores are so small and they are the only thing allowing the mixture in most of the time.
Posted on Jan 29, 2010
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