POOOOOOOOOOF goes my Mass Air Flow unit. As large gray burst's of smoke comes out. Take her off and see solid black, and gas inside. Wow I said. What you think?

 

I think your AFM just took it in the rear! ouch!

 

Cause? Affect? Fix?

 

Cause: Probably got the timing 180 degrees off,

Effect: Car ain't gonna run,

Fix: Get a new AFM and install is after you find out why it back fired


Rod.

 

Well Rod. The car Will start and Run. Only for a few Sec, but will do it. I will go back and set #1 top dead center again and check dissy out. I got another AFM. Last night I tryed to start it again. A bigger Poooooof. This time it distroyed My rubber tubeing that connect's to the AFM. So now I got to replace that as well.

 

ok, So I got to get a better look at it. I do not have any pic's for ya, But i will try to get some. This all happend from a backfire

AFM= Shot
Huge rubber hose that connect's AFM to Intake= Blown
Air Filter= Drenched in gas
Air box= Solid Black
Two vaccume lines= Shot

I think this bird is grounded for a lil while longer.

 

is your intake valve opening on the wrong stroke!?!? lol

 

So what's off time. Crank, Cam, or Chain?

 

is there a notch in your chain that aligns with the cam sprocket?
maybe it jumped a few notches...

just throwing out ideas

you should redo the timing totaly...
get the #1 to TDC...get your dizzy set properly, then see if your chain lines up with the notches in the crank and the cam sprocket.....

 

the day before this happend The car ran great. I got her to run, she only ran for about 2-3 min. But she ran, and reved up with gas pedel.the reasion she only ran for a few min's is due to empty gas tank. She ran dry. Next day I threw in a few gal's. and she strated backfireing. There's fuel in the lines I checked. And before I started the car after adding fuel. I turned the key to on. waited for fuel pump to turn off. Then to off. did it again a few times to alow pump to prime the lines. The orange fuel needle goes to 1/8 mark, and sitst there.

 

well....backfire = improper fuel ratio...your timing is off, bad plugs, rotor or cap, ...could have water in the lines...
you say it ran fine before you put in the new gas...i would rule out timing and ignition components then since it was good
now either you are starving the fuel or you got something in your tank......
i would start from the top...
first fix your blown hoses and get a working afm
check over timing again
check spark wires and rotor and cap
check sufficient fuel pressure in the lines...maybe bleed off some gas trough the lines to clean them out, how long has the car sat in the JY?
missing something?


again ideas...

 

Well. When I got the car, there was only a few thing's gone. I have replaced them all. The guy did not just get rid of his Z. He got rid of all 3 of them. I bought one of the three. I have checked the fuel lines. First time i ever seen gas shoot 2 feet in the air. I am pretty much guessing they work. Plug's are new, Wire's two. I will re check everything. reset her top dead center again. and set dissy.

 

Once when I was changing my fuel filter on my 300zx I had the fuel line on top of the filter off and for some strange f-in reason my dad turns the key to on when I was standing directly above the filter looking down at it. I got sprayed in the face with a bunch of gas.

 

when you set your timing at tdc...check your cam lobes on #1 cyl you should see then trough the oil cap..if theyr pointing up or down...

 

Well. I took the crank and set her at 0. Set dissy to #1, but i did not look at cam. I just read this. up bad or up good on Cam?

 

valves on 1 should be closed on compression stroke when setting timing...
so lobes should not be pointing down...

 

both lobes up = good

 

check and report back...

 

well. I can't set TDC at night, It's not at TDC right now. It was. I have tryed to crank motor up. But some good new's. No backfireing since I reset it. I will get down and set her TDC in the morning. Just turn the crank, getit set to 0 again, Easy to do.

 

Nice.. remem. I have a AFM to TB boot you can have..

 

well get it set...dont forget to check the cam...

 

I got a TB boot for now. i pulled one off the red part's car. Can't use it to long though. Kinda ddry rotted.
I moved the Crank mark to 0. The Lobe dirct under oil cap is Down.

 

well thats wrong then if you are looking at the right set of lobes...
heres a picture to compare...its just off internet but its set up

 

I did not see any hump of the lobes when at TDC. just even round ness.

 

you saw the smaller circle instead something like the bigger one right...this is at the FIRST cyl TDC...

well if you are looking at it right and its at TDC...and by what you say then your cam is off...
right now when its suppose to make combustion in the chamber...your valves are open and sending it out the front...