22RE cyl 3 and 4 not firing

[flash02]

Rebuilt 22RE, started out not running well, I reset the dizzy and all was good for about an hour, shut down for abut 30 min., restart and i am back to only running on two cyl. seems to run on 1 and 2 but not 3 and 4, compression is good, got fuel as the plugs are wet with fuel. Need some suggestions on what to check and were. seems like my spark voltage is week.

 

[2ndGenToyotaFan]

How's the condition of the cap and wires? Did you pull the wires while runnign to see which weren't firing? You can try changing plugs and wires around to see if the problem moves...

 

[flash02]

new cap rotor wires and plugs, swapped ignitor. I can pull the wires for 3 and 4 and the truck will keep running. pull plugs 3 and 4 and they smell of fuel, exhaust smells very rich. compression check is good. ECU? Wireing?. Going to hook up a spark tester to see how strong the spark is, I think I have spark just not stron enough. I have red some post about the TPS causing tuning issues, I am going to check the adjustments on that as well.

 

[2ndGenToyotaFan]

Try using a long screwdriver to listen to the injectors.

 

[KLF]

Long shot: turn off all the lights (or wait till it's nighttime), and start it up, look for stray sparks.

Had a bad missing problem years ago with an old Chevy V8. Opened the hood in the dark, sparks flying everywhere. New wires cured it, which I know you've already done, but I have seen brand new spark plugs not work due to a hairline crack in the insulator.

 

[flash02]

Try using a long screwdriver to listen to the injectors.

I'm somewhat sure they are working as the plugs are wet and smell of fuel, I will give it a try though

 

[flash02]

Long shot: turn off all the lights (or wait till it's nighttime), and start it up, look for stray sparks.

Had a bad missing problem years ago with an old Chevy V8. Opened the hood in the dark, sparks flying everywhere. New wires cured it, which I know you've already done, but I have seen brand new spark plugs not work due to a hairline crack in the insulator.

,
Did that, no signs of cross firing. I think my issue is week spark, pulled plugs, #1 has a good burn pattern #2 is not as good #3is wet and so is #4. I'm going to check voltage at the coil as well as recheck the TPS, if that does not work im pulling the engine wiring harness and start looking for problems.

 

[Bastler]

Double check the order of the wires to make sure 3 and 4 aren't crossed?

 

[flash02]

Double check the order of the wires to make sure 3 and 4 aren't crossed?

Yeah thanx dude,the wires are correct

 

[toy4xfun]

check all your grounds?

there is a ground for the injectors that needs to be bolted down to the air chamber bolts.

 

[flash02]

Ok so it turns out that the number three and four injectors were not firing, I replaced the injectors, everything is working as it should.

 

[flash02]

Try using a long screwdriver to listen to the injectors.

yeah I did this the day you posed your reply, sure enough the number three and four injectors were not working. Thanks for the suggestion.

 

[2ndGenToyotaFan]

Glad it worked out!



Strange to have 2 injectors go bad at once though... I would have bet on the wiring since it is tied together...