JBauer1215

I have a 1986 toyota pickup it has a problem I just cant figure out it starts and idles fine but when you start driving as soon as it has a load under it like driving up a hill it will cut out really bad an u loose power you have to downshift to regain any but it gets worse and worse and will die out over and over agian ive rebuilt the carb change the spark plugs and wires but a new distrubitor cap and rotatar on checkd the timing it was fine tested the coil it was good and check compression by takeing out the spark plugs and using a compression tester and it has good compression I'm running out of Ideas please help

xxxtreme22r

fuel pump and/or filter. start with fuel filter it's the cheapest.

JBauer1215

Sorry I forgot to tell you I have also replaced the filter and the pump twice!!!! its got me stumped somebody told me my distributor could be bad what do you think about that or if not that what other Ideas do you have

xxxtreme22r

did you do any maintenance on the truck before it started acting up? What did you time it to?

JBauer1215

I purchased the truck a yr. ago and when I got it I replaced plugs and wires cap and rotar changed oil new oil filter new fuel filter new fuel pump and it ran great for a yr. untill last week when this started and since it has started acting up I did everything I first posted including the pump and filter again and the timing was checked and it was correct so I didnt retime it it idles great doesn't miss fire pretty much purs like a kitten till you start driving it the very first time it happend my exhaust fell off while I was driving could it have something to do with backpressure thru the exhaust?

xxxtreme22r

where did the exhaust fall off? before or after the cat? If before the cat, good chance the cat is clogged, if after the cat good chance the muffler is shot. This sounds crazy but take the exhaust apart before the cat, and then see how the truck runs. If it runs fine, then hook back up the cat and undo after the cat and see how it runs.

If it's a bad cat, you can use a broom handle to smash the insides apart on the cat to gut it out. Make sure you use gloves, long sleaves and pants as you don;'t want any of that stuff anywhere near your skin, put it back up and run like that or replace your cat. Of course this method will not come with tree huggers satisfaction nor is it technically legal.

JBauer1215

lol damn hippies anyways! it fell of before the cat but I punched the cat out with a piece of rebar and reveved it up to blow all the little honeycomb chuncks out its loud as all get out now which is fine with me but still does the same thing, any other ideas I really apperciate your responses

JBauer1215

What do you think about the distributor shaft would it make it act up like this if it was worn down and needed replaced?

xxxtreme22r

I guess it's possible, but I would think with a bad dizzy, you wouldn't be able to time it correctly. You still didn't answer what spec you used for the timing. The actual value. Not just "what the FSM" says or the "right one" Because many people still don't know what the right one is. And you timed it with both vacuum lines off the dizzy right?

Also, did you test out by disconnecting just the muffler?