TIMING ISSUE I THINK. HELP ME PLEASE !!!

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 13, 2006

#1

• Jun 13, 2006

• #1

Ok here is the deal, i was driving my 66 mustang with a carb 5.0 in it and when i got on the gas, white smoke came out. so i was thinking a blown head gasket. so i replace the head gaskets and put everything back together correctly. so when i go to start my engine it kept on backfiring and not being able to idle at all. so i found TDC again and tried again. I also tried 180 degrees out and still no luck. it back fired and started a small fire on my carb, but i put it out and everything is ok, so this is where im stuck, i think its still a timing issue but im not sure. i have checked the firing order over and over and tried finding tdc and trying 180 out. so please help me !!

 

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86bluecobra

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Dec 20, 2004

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Jun 13, 2006

#2

• Jun 13, 2006

• #2

When you find tdc the rotor on the dizzy should be pointing close to 12 o'clock or a little past like say 12:30.
your firing order is a 5.0L H.O so it will have to be 1-3-7-2-6-5-4-8. Do not wire it like a regular 302 or 289 because then you usally have back firing through carb.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 13, 2006

#3

• Jun 13, 2006

• #3

ok thanks alot ill try it again.

 

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86bluecobra

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#4

• Jun 13, 2006

• #4

I hope thats all it is is the wrong firing order. A guy wired my 351w like a regular 302 and thats the issues i had that you described. When my 351w was wired like it should be like a 5.0L H.O. then it idled like it should have. In the mean time i burnt my power valve in my carb. So much for a brand new carb that now needed a rebuild.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 13, 2006

#5

• Jun 13, 2006

• #5

oh damn, i prolly blew mine out to, i geuss ill just have to see. i have to wait till the morn to work on my car cause i was about to flip out today when it caught on fire. i have had so much crap go wrong on this one ordeal, intake manifold bolts snapping in half crap like that. but im so glad the heads are on. i am cleaning my carb back out and im gonna try timing it again in the morning and see if i can get it to work.

 

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86bluecobra

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#6

• Jun 13, 2006

• #6

lol i had the same thing happen to me on my 302 in my truck. I just was torquing last intake bolt down to 18 ft/lbs and it snapped. Cheap chinese bolts. had to remove it all. I know how you feel i have had those days.
this is my latest fiasco
Well i started installing my 4 inch lift kit yesterday. I removed the driver side pivot mount for the i-beam then i started removing the passenger side. held on by 6 rivots. What a pain to get it out. Then i looked at the bracket i was supposed to bolt up for the passenger side. Yep you guessed it there is the idiot part. I didn't have to remove that mounting bracket. In fact i need it there so i can mount the drop bracket from the kit. I'm an idiot. At least ford still makes these brackets. Had to order a new one and man o man is it ever hard to get the rivots out so i can bolt this thing up. It took me like 4 hours today to pound out 6 rivots. I hate it when i decide to take on projects like this. Well i got the driverside of the lift kit all in now tomorrow when the part i need comes in i'll get the passenger side done. lol then i'll have a truck with a 4 inch lift running on 28 inch tires. i need to buy new rims and tires.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 14, 2006

#7

• Jun 14, 2006

• #7

god that sucks, i hope this work tommorrow ! or i am just gonna buy a 347 stroker crate motor.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 14, 2006

#8

• Jun 14, 2006

• #8

Hey i just thought about somthing. do you think it could be the spark plugs doing it ?? i put autolite 25 in the motor and they were pregapped. hmmm.

 

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86bluecobra

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#9

• Jun 14, 2006

• #9

i doubt it. If you are getting a backfire through the intake i would say a intake valve is open that shouldn't be when that cylinder is getting spark thus igniting the air/fuel mix in the intake.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 14, 2006

#10

• Jun 14, 2006

• #10

hmm yea true

 

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86bluecobra

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#11

• Jun 14, 2006

• #11

the other thing it can be is a intake valve stuck open.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 14, 2006

#12

• Jun 14, 2006

• #12

yea, ill try turning it over with the valve covers off so that way i can get TDC on the compression stroke and also see if any valves are stuck open, than trace every sparkplug wire in the right firing orde. if that doesnt solve my problem than i have no clue whats going on.

 

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86bluecobra

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#13

• Jun 14, 2006

• #13

I think it will solve it. I have a sneeking suspision that you are running the old 302 firing order. First thing i thought of because it was in a 66 mustang and you probably hang around other muscle car guys from the era.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 14, 2006

#14

• Jun 14, 2006

• #14

its not it has a e-303 cam in it

 

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86bluecobra

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#15

• Jun 14, 2006

• #15

epmustanggt said:

its not it has a e-303 cam in it

Click to expand...

i figured it was a H.O. motor that you had wired as the old 302 firing order. Anyways did you have a chance to make sure no valves stuck or the firing order was correct? by the way i know this is basic but you wire the dizzy in a counter clockwise direction.

 

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#16

• Jun 14, 2006

• #16

tting the distributor back in is fairly simple. Pull #1 sparkplug, put your finger in the sparkplug hole, crank the engine until you feel compression. Then line up the TDC mark on the balancer with the pointer on the engine block.

The distributor starts out with the #1 plug wire lined up at about 12:00 with you facing it. Align the rotor to about 11:00, since it will turn clockwise as it slides into place.

Align the distributor rotor up with the #1 position marked on the cap, slide the distributor down into the block, (you may have to wiggle the rotor slightly to get the gear to engage) and then note where the rotor is pointing. If it still lines up with #1 position on the cap, install the clamp and bolt. If not, pull it out and turn 1 tooth forwards or backwards and try again. Put the #1 spark plug back in and tighten it down, put the clamp on the distributor, but don't tighten it too much, as you will have to move the distributor to set the timing. Note that if it doesn't align perfectly with #1 position, you can turn the distributor until it does. The only problem is that if you are too far one way or the other, you can't turn the distributor enough to get the 10-14 degree optimum timing range.

At this point hook up all the wires, get out the timing light and start the engine. Set the timing where your car runs best.

 

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epmustanggt

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Jun 13, 2006

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oak harbor wa

Jun 15, 2006

#17

• Jun 15, 2006

• #17

Well the car is timed correctly and is still backfiring. so i am going to be checking how tight the rocker arms are or how the carb is tuned. I know for a fact, 100% sure its timed correctly now. but if it is still backfiring than i think maybe valves are to tight or maybe tuning the carb or blown power valve. these are just my thoughts now. when i replaced the head gaskets i hand tightened the rocker arms down so i dont see how it could be too tight to keep an intake valve open when there is combustion. i also dont see a valve being bent if i just hand tightened. so im just not sure what the heck is going on now.