i just put a new motor in.. i got all the electrical hooked up.. the starter turns over.. and its getting fuel.. but wont start.. i pulled number 1 plug and checked for spark.. and its getting it.. am i doing something wrong.. or well actually i know i am i just need to know what.. any ideas people.. i need as much help as possible thanks

 

What year and model is it? And what motor did you put in it?

 

advance the thing till it starts man. then time it to 10' i.t. and 32 t.t thats were i would start

 

its nad 86 z28... i swapped in a 350 we built.. i did the timing.. and nothing.. like it will back fire out of the carb and sometimes the fuel in the carb catches fire.. but as for timing ive tried it all

 

if u have an MSD box u need a minimum volt level going to it or it wont fire properly , make sure u have good voltage.

 

good luck man , u probly thought of these alretty

 

well heres the deal.. i have a msd box and coil.. just not hooked up..i wouldnt think just cause thats not installed it wouldnt fire over.. im at like 10.8 to 1.. to 11 to 1 compression as well

 

Sounds like you are 180º out on your timing.

 

see thats what we thought but weve turned it 180 and nothing.. then turned it again

 

How did you set it to begin with? What is it cranking like? Fast, slow ect...

If you unplug power to the distributor and the motor turns over a lot faster then you know you have a timing issue.

 

If you got gas backfiring in the carb, it probably the timing, did you off set the plugs? That's what happened to me. Instead of 8 and 1 being on the front of the distributor it's 1 and 2

 

its cranking not so much fast.. but not really slow and it back fires when i pump the gas sometimes.. and if the motor turns over faster.. what should i do if i have this problem??

 

well when i looked in the book for spark blug wiring it said electronic or points distributor.. i have one with a coil on top.. so thats an electronic right?? so i start with one then 8 and so on like it shows..

 

Yes you have HEI which is a version of electronic.
1-8-4-3-6-5-7-2
It doesn't matter where number one is on the distributor, as long as the order is correct. The only type of distributor that matters on is the optical pickup type.

 

ok well what if im running 11 to 1 compression ratio.. do i need more spark??? do i need a high torque starter.. could it not be firing cause its not turning fast enough???

 

Its really impossible to help you unless you give some feedback as to what you have tried and what the results were.

No your compression should only make it fire that much easier.

 

To start from absolute scratch, find top dead center for #1
Then look where you rotor is...it should be pointing pretty much at #1 plug
This will rule out whether you are 180 Degrees out or not
https://www.thirdgen.org/forums/tech...or-doesnt.html
My post #56 will show you a good angle for your Dizzy as a starting point

 

sorry i just have like a million people telling me diff things.. so ive checked to make sure i get fuel to the carb..and i get spark.. i have all the plugs gapped at 45..i turned the motor over and it backfires through the carb when i give it gas..ive tried turning the distributor 180 and its the exact same things.. when i do turn it over it sounds like its working really hard to do soo.. i know im at like 11 to 1 compression ratio..so thats all the things ive tried that i could think of trying

 

i forgot to mention that i am running a different fuel pump.. its from like 5 to 8 psi i think.. but has no return line like my old one did could that also be a factor?

 

set the timing over again like mentioned above. I had similar issue on my motor in the first gen and turned out i messed up the timing. Once it started up just turned the distributer until it ran good.

 

Again i gave you a very simple tip for diagnosing a timing issue. I will say it again, disconnect the power fire from the distributor. Its a simple little clip on deal. If it turns over faster then go back to square one dropping the distributor.

If that doesn't do anything then look at fuel. But i will bet dollars to doughnuts its a simple timing issue.

For timing this is what you need to check. That at TDC you are on the compression stroke, and not the exhaust stroke. You can do this by either pulling the driver side valve cover or pulling the plug on cylinder one. Valve cover method means you are checking that both valves on cylinder one are closed. So the rockers should both be in the same position(up) and the pushrods should spin fairly freely.
With the spark plug method you simply put your thumb over the hole while someone turns the motor to TDC by hand and feel for compression. You will only feel it on the compression stroke since the exhaust valve is open on the exhaust stroke.

TDC should be 0º on your damper.

Personally i just set my damper to about 10º advanced and then drop the distributor in so the rotor is right at number one.

 

well looks like i found out what i was doing wrong.. when i went to take out my heater i had a wire that was somehow connected to the starter and it wasnt supposed to be..so it would draw amps from it and not enough power was getting to the motor..also once we corrected that.. the valves when to tight because that ne of the reasons we thought it wouldnt start.. so i back those off..timing on like i though.. turns over and fires.. just need to adjust the carb.. its either dumping to much fuel or not enough.. we just rebuilt it so itll need the adjust ment..thanks to everyone for putting your 2 cents in and helping.. i shoulda jsut paid more close attention..