OK just did the tec cleaner. ordered new plugs last night. put new conrad cap and rotor in. and started it up and bam, bam ,bam. Thought i switched the wires so fixed the 2 i thought were off and backfired and did not start. Then switched back and started and back fired 4 times in 30 sec. and shut it down. Would fouled plugs cause this or what else can be wrong?
BACKFIRE!!!
- Thread starter nomoty
- Start date
ok printed the firing order off authority! the one that is actually the pic. hooked mine up like the pic showed but it would not start. I have my TY on ramps now cause we are in the process of pulling the front diff. would being on the hill keep it from starting w/ over 1/2 tank most likely not! compared to that pic the pic shows flat side at 1 o;clock and mine is at 11 o'clock. does this matter? Any ideas would greatly be appreciated!
ParTyBoy
New member
92ty0040 said:
Hey marc... sounds like you got the plug wires mixed up... first time I did a tune up a couple years back the same thing happened... Green knows.. cause he was the first one I talked to... I just happened to mix up two of the wires... If it happens.. you'll here a whine followed by (pop, PoP, poP, Pop) .. and you'll be shutting the truck down really quick.
look at this diagram http://www.whitetyphoon.com/firing_order.html
Print it out.. and check to make sure the wires are on the propper plug and respective distributor cap contact... and make sure the boots are "secure".. you should feel/hear a slight pop.. suction sound.. Only thing I could relate if to is it would be like if you were to put your thumb in your mouth and pull out on your cheek.. like a kid would do.. If you have to pull out all your plug wires.. stick them on individually.. putting masking tape on the end boot of the distributor cap end of the plug wire...so you don't mix them up..
You can pull of the tape... simple and quick.. as you're sticking the boots on...
Check these connections and let us know....
Hu Ryde
Donating Member
As far as the plugs go you could have pulled the plugs sprayed carb cleaner/ starting fluid on them and lit them on fire and that would have burned all chemicals from the TEC off and they would have been fine. I didn't change the plugs when I did it and when I pulled them they were fine, no discoloration or anything. I would just clean them and save the others.
This image is the way you should number the cap.
Here is the cylinder #'s for our motor.
Rear
6 5
4 3
2 1
front
Match the corresponding numbers and you should be good. What cap did you get? Conrad I hope.
The only thing that is recomended is a change of oil. But, if you read the back of the can it says nothign like this and I don't see how it can get in the oil unless you have bad valve seals or bad rings, go figure? Most of these motors that are all original I would definately change the oil, but if your doing this to a motor that has a fresh build I don't think it need to have oil changed. I don't know why you would do it in the first place to a fresh motor but anyway.
Now about the flat spot, mine was in the 01:00 position the last time I checked. Is it an original distributer? Is you timing correct? Hope all of this helps!
This image is the way you should number the cap.
Here is the cylinder #'s for our motor.
Rear
6 5
4 3
2 1
front
Match the corresponding numbers and you should be good. What cap did you get? Conrad I hope.
The only thing that is recomended is a change of oil. But, if you read the back of the can it says nothign like this and I don't see how it can get in the oil unless you have bad valve seals or bad rings, go figure? Most of these motors that are all original I would definately change the oil, but if your doing this to a motor that has a fresh build I don't think it need to have oil changed. I don't know why you would do it in the first place to a fresh motor but anyway.
Now about the flat spot, mine was in the 01:00 position the last time I checked. Is it an original distributer? Is you timing correct? Hope all of this helps!
ParTyBoy
New member
92ty0040 said:
don't sweat it... It's most likely just that it's a mixed plug wire... so you burnt out all the TEC right...?? change the oil yet?? that's not the cause of this backfire problem, but you should still do it nonetheless... I just finished the same TEC, plugs, wires, cap/rotor, oil change, about three weeks ago... Can't be too many things... Not to worry.... Let us know what happens after you check to see if the rotor is seated propperly, the distributor cap is secured tight with both screws.. and you double check the plug wires
Ian Turgeon
Cascading Inspiration
sounds like its way off, mine points about the same direction as the one in the pic. If the "ears" of the cap are facing the 11 o clockish, I cant imagine your timing is correct.
Check TDC with a piston stop and adjust timing accordingly
Check TDC with a piston stop and adjust timing accordingly
so far i have changed the oil mobil 10w-30 high mileage synthetic, conrad cap and rotor. but if my timing was off wouldn't it have been screwed before the tec instead of after? i dunno? i get my friend to get his timing light. and borrower a tool program from autozone. ok who is right is 1,3,5 on driver or 1,2,3 like hu rude said?
ParTyBoy
New member
92ty0040 said:
Richard Le's pic is correct... Jessie just probably made a quick typo...
Yeah I'd check your timing... the cap corner edges should be facing the same direction they are in the pic...with the number 3 Distributor cap contact facing around 1 o'clock... there's really only one way the cap will go on and bolt down... so I'd agree that you should check your timing....
Ian Turgeon
Cascading Inspiration
Mike got me thinking, Its posible someone screwed up the wires on the last install by puting them on the wrong posts, and setting the timing to one post retarded.
that, making them correct to have them hooked up incorrectly. Hence, running fine before changing plug wires, now running like crap because all the wires are one terminal off. I'd suggest trying mike's idea. If it works out. FIX IT, put the wires in the right place, and adjust the cap to the proper location. Also, writing the numbers on the cap like above helps. You cant see it when the wires are on, and it helps you next time.
that, making them correct to have them hooked up incorrectly. Hence, running fine before changing plug wires, now running like crap because all the wires are one terminal off. I'd suggest trying mike's idea. If it works out. FIX IT, put the wires in the right place, and adjust the cap to the proper location. Also, writing the numbers on the cap like above helps. You cant see it when the wires are on, and it helps you next time.
4C FED
Absolutum Dominium
Here, maybe this will help:
This is how it should look as per GM manual.
With the cap off the rotor should be pointing to the #1 electrode on the cap, with the engine at TDC.
With the cap on, the arrow should be pointing in a straight line along the upper intake manifold.
HTH,
This is how it should look as per GM manual.
With the cap off the rotor should be pointing to the #1 electrode on the cap, with the engine at TDC.
With the cap on, the arrow should be pointing in a straight line along the upper intake manifold.
HTH,
OK mmy buddy thinks ian is on the right trck so we moved the plugs one over counter clockwise. Waiting for wife to get home with jumpers since it's sluggish but it did almost start! i'll be back!
Oh and the differential i went to pull ended up trash whole inner slimited slip or whatever was almost gone gears are still there but it was full of metal shavings like over a handfull or more.
Oh and the differential i went to pull ended up trash whole inner slimited slip or whatever was almost gone gears are still there but it was full of metal shavings like over a handfull or more.
ok finally got it started runs rough but no back firing. so after i change the plugs and install ian's kit it should be runnin good!!! No pressure Ian but when do you think the kits will ship? I did that start 6 at egr and go from there and worked!!!! Thanks so much. I'll have to reset everything later cause i have no timing light right now. Oh and the exghuast still smells like it's burning the tec out??? I guess since i can't drive it i can't really burn off some boost like the instructions state!!! lol i holla back? Ian can you e-mail or post an update i would appreciate it...Definitly no pressure though!!!
Ian Turgeon
Cascading Inspiration
best i can give you is that the GIANT box of hose should be here tomorow.
I've got a hub-ub to do this weekend, but hope to get some work done, and have some shiped out beginning wed. HOPEFULLY.
I've got a hub-ub to do this weekend, but hope to get some work done, and have some shiped out beginning wed. HOPEFULLY.