Join Date: Oct 2010
sledwrecker is offline
S10 4.3 running rough and dies after warming up
Hey guys, I've been through the forums and all over google I've spent about $400 in parts and still have not managed to figure out what the heck is wrong with my S10.
The Story: 1990 S10 Baja with 4.3. Ran great no issues then I parked it when I was given a hand-me down explorer. It sat for about 6 months then when I moved I drove it about 25 miles to my new house. Along the way (about 5 miles from where it was parked) it died.. hard to start had to hold the pedal to the floor but it started and made it. Sat again for about 6 more months. Moved again.. drove it about 20 miles it was running a little rough and kinda lacked power or would surge when under load. Did a wood run and let the truck idle while I was loading the wood, truck just died on it's own I thought it was out of gas becuase I couldn't get it to start after it died.. added gas still no start.. about 2 hours later I went back out and it started again, I parked it. Now the truck has sat again for about 6 more months. I started to try fixing it about 3 months ago.
Starts on first crank easily but runs REALLY rough until I rev it out. If I can get the RPM's up it will clear out after blowing smoke for about 20 seconds (blueish smoke) then it goes clear and will rev but I can hear it slightly missing. Truck will then idle for about 5-10 minutes with a light lope then it will stall and will not start again. If I let it sit for about 1-2 hours it will start and do the same thing all over again.
Work performed to date:
-New Plugs (NGK)
-New Distributor Cap
-New Fuel Pump
-New Positive and Negative Battery wires
-New Lifetime warranty starter (burned out the original one cranking it after I got stranded)
-Drained fuel tank completely (no rust very clean)
-Grounded Motor to Frame and Battery to Frame (originaly batter was grounded to motor only)
-Removed and cleaned EGR valve and checked it for leaks
-Got used throttle body injectors from pull-a-part (absolutely no change still stalling)
-Replaced a couple vacum lines (found two that were cracked)
-Replaced Sensor above valve cover on passanger side that has vacum line going to it. (lame I can't remember what it was called)
After all this it starts MUCH easier I dont have to hold the gas pedal down and idles smoother but still dies (I'm scared to drive it out of the driveway)
I couldn't change the fuel filter the line is rusted and it feels like it's going to break if I torque on it any harder but we did put a new one in less than 10k miles before it was originaly parked.
Today I pulled the truck out yet again to ground the Motor and Battery to the Frame, new battery cables all the way around and sanded the frame for good contact. Still no real change.. "Service engine soon" light comes on after truck idles for a couple seconds. I changed the oil and filter and it smelled like gas really bad and poured out like water. Still looked like oil (not milky) but definitly gas in it.
Any help would be great, THANKS GUYS!