So I kinda ruined my other lt1 and have been building this one for about 6 months now. I had everything ready to go and tuned it for my C.I.'s and injectors and a few other things that someone had told me to start with to get it going. A few things I have found out so far. I know I have spark and am pretty sure (after reading more and more I am nervous about my timing) I have my timing right. I put the crank gear on alined with the key and then matched the cam gear with the crank gear with the dots (crank at 12oclock cam at 6 oclock). It turns over but doesn't want to start. I think I am getting to much gas because when I pulled my plugs they were pretty drenched with gas. What could be the cause of this? What all do I need to do when going to a 383 with heads, cam, tb, headers, shaft mount sr, ewp, 255lph fuel pump, 42# injectors. What is a comon problem with start up on a new built engine? any help would be appreciated guys!!
Freddie V.

 

You've posted this several times. An earlier thread indicated the PCM had not been tuned for the 42# injectors. Another thread said you toasted your PCM trying to load a tune. Another thread indicated you had a weak battery.

Have all the previously identified problems been corrected at this point?

https://www.camaroz28.com/forums/sho...d.php?t=562986

https://www.camaroz28.com/forums/sho...d.php?t=563236

https://www.camaroz28.com/forums/sho...d.php?t=562476

 

yes so far all of those have been identified. But it still didnt seem to want to start before I was trying to retune and fried my computer. So the problem is that it is still getting to much fuel I think. What are possible reasons for this?

 

Didn't read all the others posts you had but it should start if its running rich but it might get flooded if you haven't let it sit for a while. I would first get the tune or put the correct injectors back in till you solve this problem.

 

Unless I'm way off base on my understanding of injector technology, on the stock tune, 42# injectors would inject nearly twice as much fuel as is needed. Of course the car won't run like that!

Take your car to an experienced LT1 tuner.

 

One last try.... have the problems you have IDENTIFIED been CORRECTED at this point in time? For example, has the tune been upgraded from the stock 24 #/HR injectors to the 42 #/HR injectors you are currently running?

 

Yes I had it tuned for the injectors

 

I personally don't want to find all your posts to see what may or may not be the problem.

According to the post above, YOU were messing with the tune. It does not strike me as the most knowledgable thing to do at this point.

I highly suggest you start a list of items that you know have been checked and start back at the basics. All the while keeping in mind you need 3 things to fire up. Fuel, spark and compression.

Start by checking compression. Balance is more important than level.

I think you checked spark but did you check enough cylinders, in a SBC it only requires loss of spark in 3 cylinders to keep it from running.

Unless you are 100% sure the fuel is actually getting into the cylinders, you should confirm fuel pressure and injector pulses. If you confirmed both of those, and all the rest, put the original injectors back in. By the way, HAVE YOU CHECKED TO SEE IF YOU HAVE FUEL CONTAMINATION IN THE OIL?????????

If after all that is checked and confirmed and it still won't start, you should assume the spark is not occuring at the correct time. Therefore do the following:

Put number 1 at TDC and then remove the cap from the distributor, not the whole distributor. Confirm the rotor is pointing at or very VERY close to the 6 O'clock position. If it is, lets find the next problem. If it is NOT pointing there, you must remove the distributor and find what is miss-aligned.

So let's recap for your benefit. If you have:
Fuel
Spark
Compression
And it still won't start, it must be the spark is occuring at the wrong time.

Now don't start another thread, confirm what I mentioned and if you still can't figure it out, report back on this thread and abandon the others. And include all the information so we don't have to PULL it from you.

 

Well said speedy, stick to the basics. air, fuel, fire and compresion. last one that came through my shop had no compresion due to over tightened rocker nuts. he thought zero lash was the lifter totaly compresed and then went 1/2 turn passed that!