I have no spark at the plugs, if I pull the coil wire out of the cap it will spark. I changed the plugs,wires,cap,rotor,pick up coil,crank shaft position sensor and the mad air flow sensor,also has new fuel pump and gas tank. Any ideas?

 

Ok, time to actually troubleshoot, not just throw parts at it.
You say that if you pull the center wire, you get spark, right? I presume you mean that you pull the center wire off the cap, and hold it near a ground to check it. Next step is to pull a plug wire off a plug, and either hold that near ground, at the plug end, and look for spark, or put a loose plug on it and hold the plug on a ground to test for spark. Preferably on a ground on the head, since that's where the plugs get their ground.

Double check the ground that runs from the head to the body, as well. If it's bad, it may be preventing a good path for current flow, thus, no spark. There's a very good reason the head has it's own ground wire. Don't try to rely on a connection to the block to provide ground to the head.

Don't forget that there needs to be a good ground from the battery to the body, as well. There should be at least 2 ground wires on the battery - terminal. One going to the engine block, one going to the body, usually some place close to battery and somewhere in front of it. They are both very important.

Is the plug sparking when the engine is cranked?
If not, either you got a bad set of wires, bad set of plugs, or a bad cap/rotor assy. I've gotten caps from the store (Napa) that have a hairline crack, and don't allow spark to go out to the plugs. But it could be any of them. Mass production means a bad part can sneak through on occasion.

Finally, are you certain the timing is set correctly? That could be your trouble too.

Good luck!
Pat☺

 

Thanks Pat, I’m at work I’ll check that ground you are talking about, I did look at it before, but just looked to see that it was there because the guy I bought the truck off of replaced the motor,1st motor change for him, so I started checking wire connections and grounds. He told me the truck ran great than just quit and wouldn’t start.

 

There easily could be a bad ground that looks good. Corrosion can build up under the ring terminal on the wire, preventing current flow across to the body. Or the connection on the head it's self. Pull each end off and make certain they have clean, dry metal, both the ring terminal, and the body. A little fine grit sand paper will clean any corrosion, paint, and so on, off. A squirt of electrical contact cleaner, carb cleaner, or brake cleaner, will remove oil, dirt, and so forth. A little dielectric grease on the ring terminal and body when you reassemble them will keep things in good shape long time.

Also, check the wire it's self. These old wires can break, or corrode through, inside the insulation. Hook a multimeter to both ends while it's off, and wiggle and flex the wire through it's entire length, including the ring terminal crimps. ANY change in the resistance of the wire, which should be zero ohms, replace the entire wire. Not hard. A short, 6-10", enough to reach the connection point on the body, with a fair amount of slack for motor movement, of 12Ga wire with a ring terminal crimped to each end, with meltwall heatshrink on the crimps, and voila! New ground wire. Should take a whopping 5-10 minutes of work. Tough, I know, but it's got to be done sometimes

And, don't disregard the other checks. Any of the items I mentioned could be, or ALSO be, the trouble. Probably some other things I'm forgetting, as well. I'm sure one of the Toyota Experts on the forums will chime in with THE problem area

Good luck to ya!
Pat☺