Topic: 1986 SR-5 22-RE cranks no start

[colo.toy]

I have a 1986 Toyota SR-5 with a 22-RE 4-cyl.  I bought it, fixed it, and drove it around for a couple weeks, but one of the spark plug wires fell down and rested on the header, melting through it.  At this point, it only fired on 3 cylinders.  I bought a new set of Toyota plug wires, but now the truck will crank but wont start. 

I've checked fuses, compression, fuel pump operation, spark at the plug (has new plugs, wires, cap, and rotor)  and spark timing from the distributor.  It seems to me that the injectors are not getting a signal, I was hoping anyone would know if there is a relay I don't know about, or if the fuel injection computers on these are problematic at all?  Anything you can share with me would be great, I just want to go wheel!!   

[toyomr285]

I mentioned to another guy to check your efi main relay under your driver side kick panel.  When you turn the key you should he a click.  If you don't change it.  Hope that helps.

[83MT]

If it ran fine (other than the cylinder which obviously wouldn't fire without spark) before changing the wires, and now it won't even start, I'd make sure you got it all hooked up right. You did mention you checked all the ignition/spark stuff, though. So it is getting spark at the plugs?

[Doable]

That's weird going from burning up one spark plug wire to a no run situation. Not being ugly but there is fuel in the tank?

[colo.toy [OP]]

thanks guys, I checked all the fuses underneath the dash, and all of them are good. 

It is definitely getting spark at the plugs, and I've checked timing on the distributor to make sure it is getting spark to the correct cylinder on the compression stroke. 

Yes, there is definitely fuel in the tank.  I've driven it all or about 75 miles since I bought it, and filled the tank when I bought it.  Is there a possibility that a fuel filter would cause a no-start situation?  The truck sat for a year before I bought it, I'm wondering if it just stirred up a bunk of stuff on the bottom of the tank and clogged the filter.

[Doable]

Can you crack the line going to the fuel filter or  EFI and see if it his getting fuel?  Or to test the fuel pump you could just disconnect the plug in at the tank and jump it to the battery ( should be a blue (+) and white (-) wire) you should be able to hear the pump running.

Just thinking out loud here but if your getting spark your only missing fuel.

[colo.toy [OP]]

yeah, I've cracked the pressure line to the fuel filter, and jumped the test connector underneath the hood to see if the fuel pump is working, and I do hear it run, and there is fuel coming out.  I'm thinking that I'm not getting a signal to fire the injectors, so even though there's fuel to the injectors I'm not getting fuel into the cylinder. It's just very strange to me that all of this is happening at once...

[emsvitil]

Are you sure you put the spark plug wires in the correct socket?

[colo.toy [OP]]

yes, im sure.  firing order is 1-3-4-2, and with cylinder 1 on tdc compression stroke, the rotor is pointed at the wire for number 1 cylinder. 

[Doable]

You could test the harness going to the injectors rather easy. Oreilly auto parts has some noid light testers that you could buy for $17.00 or just borrow from them for free.The Bosch tester is the one for Toyota's.

http://www.oreillyauto.com/EW3/DisplayTheParts.do?toolsAccMoreIndex=View%20All%20Matches&didSearchFor=Noid&bid=1245269953909&cycleCount=1750


It should help answer some of the questions .

- Next you could ohm out the solenoid resistor. It's located on the passenger inner fender well next to the fuse box/ battery . 2-3 ohms is what is should test .Page 235 of 1025 of the FSM

-Start Injector Time Switch is what you could look at next. Located by the #1 injector/ block off plate on the engine for the mechanical fuel pump area. page 236 of 1025 of the FSM.

Could also be the TPS that is faulty.
Did you by chance unplug any of the wires going to the injectors?

Don't know why it's not running, it may be as simple as one wire unpluged that your not seeing. Do you have access to the Factory Service Manual ?

[emsvitil]

yes, im sure.  firing order is 1-3-4-2, and with cylinder 1 on tdc compression stroke, the rotor is pointed at the wire for number 1 cylinder. 

And #1 is upper left of the cap, clockwise rotation........

(sorry, but I think it has to be something with the cap and wires, since that what was changed)

Rotor seated?

[Doable]

[

[toyomr285]

I agree with doable, you might want to check your tps or just play with it.

[Doable]

 Could we be over thinking it ?

http://board.marlincrawler.com/index.php?topic=59241.0

[colo.toy [OP]]

Alright guys, first of all I'd like to say thank you to all of you helping me out!     

I think I've finally found the cause of what is going on with my truck.  While I was working on it today, I pulled the valve cover off, and the spark plugs out to make sure that all cylinders were functioning properly, getting compression, no bent valves, etc.  When I turned the engine over, everything worked, but I heard a strange ticking noise coming from the front of the engine every couple of revolutions.  I cranked the engine backward about 90 degrees, and heard the crankshaft teeth skipping over the chain.

It turns out that the hydraulic chain tensioner for my timing chain has an internal leak or something, and is not tightening the timing chain properly.  I think what happened is when it started missing, the vibrations in the engine, or the lack of oil pressure, or something along those lines caused my crank, camshaft, and distributor to get out of time with each other, resulting in the cranks no-start. 

My final question for you guys (for now) is if anyone knows if a junkyard unit would be OK to throw into this, or if I would be better off buying new.  Also, does anyone have a dual-row timing chain conversion kit for these for sale?  I'm going to pull everything apart so I can re-time the crank to the camshaft, and while I'm there I figured I would do the timing chain, tensioner, and guides so I know that everything is new and functioning properly. 

Again, thanks for your help guys!