Thegreek Posted January 3, 2019 Report Share Posted January 3, 2019 So yesterday I drove the truck about 20 minutes, and i noticed going up a bridge that it was starting to miss and jerk a little. By the time i got to where i was going the missing got worse and the truck was shaking non stop. Would not stall, but barely had any power. She idles fine, at a lower idle than usual, but when u rev it, something is off. Truck feels like it has half the power. Please help. Quote Link to comment
datzenmike Posted January 3, 2019 Report Share Posted January 3, 2019 Change the fuel filter. If it idles ok and nothing changed then it's not that serious like a head gasket blown. If the fuel filter is part blocked or part blocked, it won't supply fuel fast enough for what's needed. Climbing hills or highway speeds is emptying the fuel bowl faster than the pump can supply and the engine is struggling like it's running out of gas. Idle, on the other hand, uses less and is fine. Quote Link to comment
Thegreek Posted January 3, 2019 Author Report Share Posted January 3, 2019 17 minutes ago, datzenmike said: Change the fuel filter. If it idles ok and nothing changed then it's not that serious like a head gasket blown. If the fuel filter is part blocked or part blocked, it won't supply fuel fast enough for what's needed. Climbing hills or highway speeds is emptying the fuel bowl faster than the pump can supply and the engine is struggling like it's running out of gas. Idle, on the other hand, uses less and is fine. Ok. I'll change it. Ironically I ordered all new tune up parts 3 days ago.... plugs, wires, cap, and rotor. Hopefully it helps too. Quote Link to comment
banzai510(hainz) Posted January 3, 2019 Report Share Posted January 3, 2019 (edited) Distributor parts harldy ever go bad to me. If points make sure to adjust and check the condensor or distributor shaft loose.or water underneath cap if it was washed or snowing and a fast heat up.Condensation under dist cap. I would ck if a lash pad fell off under the rocker arm.. It wouldmake like your looseing a cylinder. one way to ck is pull a spark plug while running. if get worse you know that one is good. then hopefully you find one that nothing happens then thats it. Coulds be spark plug or wire. whayt happens is your not having compression and gas exploding. so a dead cylinder. as mike said swap out a fuel filter.On truck the fuel is more like to get dirty as gas tank is exposed to the elements and fuel hose. swap out at least once ever 2 years as a min. ck the timming also incase the dist is loose and moved on you somehow aiaf anything was changed before this happen let us know. eg.. like a coil or soemthing.Most new owners swap in wrong parts thinking they match and they dont Edited January 3, 2019 by banzai510(hainz) Quote Link to comment
datzenmike Posted January 3, 2019 Report Share Posted January 3, 2019 It's cheap >$5 and it's easy to do. More important it's likely due. I've had a wire fall off that did the same thing. Quote Link to comment
Thegreek Posted January 3, 2019 Author Report Share Posted January 3, 2019 2 hours ago, banzai510(hainz) said: Distributor parts harldy ever go bad to me. If points make sure to adjust and check the condensor or distributor shaft loose.or water underneath cap if it was washed or snowing and a fast heat up.Condensation under dist cap. I would ck if a lash pad fell off under the rocker arm.. It wouldmake like your looseing a cylinder. one way to ck is pull a spark plug while running. if get worse you know that one is good. then hopefully you find one that nothing happens then thats it. Coulds be spark plug or wire. whayt happens is your not having compression and gas exploding. so a dead cylinder. as mike said swap out a fuel filter.On truck the fuel is more like to get dirty as gas tank is exposed to the elements and fuel hose. swap out at least once ever 2 years as a min. ck the timming also incase the dist is loose and moved on you somehow aiaf anything was changed before this happen let us know. eg.. like a coil or soemthing.Most new owners swap in wrong parts thinking they match and they dont I pulled plug wires off one at a time starting from the front (radiator) and the first two made a big difference, like she wanted to die, but when I did the last 2 there was very little change. Quote Link to comment
Thegreek Posted January 3, 2019 Author Report Share Posted January 3, 2019 1 hour ago, datzenmike said: It's cheap >$5 and it's easy to do. More important it's likely due. I've had a wire fall off that did the same thing. Fuel filter is a month old, but there are rust particles on the bottom. I'll change it again. Quote Link to comment
wayno Posted January 3, 2019 Report Share Posted January 3, 2019 (edited) Having both the 2 rear cylinders not make much of a difference is bad, makes me think headgasket. Check the oil, is it a milky brown color now? Pull the valve cover and check your valve lash, make sure they are not too tight, as that crap fuel they sell these days can make valves sink into the head, when that happens valves get out of adjustment and start to be slightly open all the time, but generally one has it start to back fire thru the carb, but check them anyway. You want to check everything before removing the head, it's a lot of work to change a headgasket. Edited January 3, 2019 by wayno Quote Link to comment
Thegreek Posted January 3, 2019 Author Report Share Posted January 3, 2019 (edited) 37 minutes ago, wayno said: Having both the 2 rear cylinders not make much of a difference is bad, makes me think headgasket. Check the oil, is it a milky brown color now? Pull the valve cover and check your valve lash, make sure they are not too tight, as that crap fuel they sell these days can make valves sink into the head, when that happens valves get out of adjustment and start to be slightly open all the time, but generally one has it start to back fire thru the carb, but check them anyway. You want to check everything before removing the head, it's a lot of work to change a headgasket. Oil is fine...same as always. I havent checked for fouled plugs or wires cuz I'm at work now. Edited January 3, 2019 by Thegreek Quote Link to comment
banzai510(hainz) Posted January 3, 2019 Report Share Posted January 3, 2019 (edited) Look at plugs. also maybe look at the dist wires and to the dist cap underrneath that concerns those 2 wires. Weird how 2 goes out at once. I would look at the intake bolts tight near there or if a brake booster hose is on that side if loose cracked( Im guess on this last part here since its a all of a sudden proplem to me its the rocker arm fell offor lash pad fell out on topof the valve retainer. Use NGK or Nippondensoplugs Edited January 3, 2019 by banzai510(hainz) Quote Link to comment
Thegreek Posted January 4, 2019 Author Report Share Posted January 4, 2019 So I pulled the plugs from the two cylinders in the rear and both spark plugs were smashed shut. I replaced the plugs, and she runs fine, but has a clanging once in a while inside, as if there is something jumping around on the piston. It doesnt do it all the time, I guess only when the piece lines up with piston and plug....help. Quote Link to comment
Crashtd420 Posted January 4, 2019 Report Share Posted January 4, 2019 If they were smashed shut you definitely have a bigger problem.... Try shining a flash light through the spark plug hole and see what you can see.... Quote Link to comment
Thegreek Posted January 4, 2019 Author Report Share Posted January 4, 2019 1 minute ago, Crashtd420 said: If they were smashed shut you definitely have a bigger problem.... Try shining a flash light through the spark plug hole and see what you can see.... Guy from work is gonna lend me a camera that hooks up to a phone. Quote Link to comment
Crashtd420 Posted January 4, 2019 Report Share Posted January 4, 2019 Just now, Thegreek said: Guy from work is gonna lend me a camera that hooks up to a phone. I was gonna suggest that .... best idea.... get a good look inside.... might be best not to run it till you have a look Quote Link to comment
G-Duax Posted January 4, 2019 Report Share Posted January 4, 2019 If the plugs were smashed shut, why even bother with looking through a plug hole, because there is definitely something seriously wrong, unless you recently had the air cleaner off, and let a screw, or nut drop into the carb... Or were you not running an air filter ? Quote Link to comment
Thegreek Posted January 4, 2019 Author Report Share Posted January 4, 2019 14 minutes ago, G-Duax said: If the plugs were smashed shut, why even bother with looking through a plug hole, because there is definitely something seriously wrong, unless you recently had the air cleaner off, and let a screw, or nut drop into the carb... Or were you not running an air filter ? I recently replaced the adapter for the carb....but I dont think I dropped anything.... Quote Link to comment
datzenmike Posted January 4, 2019 Report Share Posted January 4, 2019 I recently replaced the adapter for the carb....but I dont think I dropped anything.... Yeah, I thought I only farted once.... Replacing the adapter is the most likely cause. Probably lock washers. If they get pinched in the valve so it can't close the valve lash pad may jump off the spring. Try a wire with a magnet small enough to fit the plug hole and sweep it around inside. Left, they are just going to hammer the piston tops and the soft aluminum head. They may pass out the exhaust with luck but best not to count on this.. Quote Link to comment
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