Resolved HELP!!! 2G Cranks and Starts, dumps fuel, low 02's?

[Musashi450]

Hey guys,

Ok so I've searched around A LOT and haven't been able to come up with a definitive solution for my problem. As the title states, I crank the car and it doesn't start.

I'm in the process of rebuilding my engine and after getting it all in and put together it was starting up (with a little hesitation at times) but it would start up none the less. I have an optima red top and I accidently left the lights on in the car so I left it charging overnight on a 2Amp charge, ever since then no start.

Thinking oh I messed up the battery, got it checked at Autozone and they said it was fine.

I just did a compression check and got 150-150-140-140 so that looks good. Needed to replace the starter and I did but that didn't help anything. Also had the alternator checked and that was fine.

Now the strange thing is that, while I'm cranking (I have a analog voltage gauge) I see it just drop which I don't recall it doing before. When I mean drop it just loses all voltage going to this circuit.

I know I'm getting fuel because the FPR gauge reads 45psi while cranking. Thinking maybe an injector was dirty I looked for fuel while doing the compression check and fuel was getting into the cylinders fine.

Also pulled the computer (I know its usually a 1G thing with the computer going bad, but figured I'd check) and it looks great. I also know that its getting spark because I shocked the shit out of myself while checking.

The only thing that I can think of maybe is that the battery load test wasn't very reflective of what my battery is actually doing, or maybe I'm not getting enough voltage to the coil, hence not a strong enough spark (Sure did hurt though). Plugs and wires are new however so maybe something in the coil?!

Something is grounding out but I don't know where!? Any help is appreciated guys. Damnit I'm gonna tackle this one. Thanks a bunch!

Edit: Also I've checked all the fuses except for the two 10A up near the ignition column but because it turns over, I doubt this is it.

guys this is driving me crazy!?! Apparently I have spark on all four plugs and its nice and blue. Then I put it back in and reattached the computer and it turned over for a sec!!!! Ever since then I've kept trying but then it started just turning over for a little bit and dying. Now its back to where I started!

For a bit it just started clicking when I went to turn it over but soon enough it started cranking again. WTF is wrong with this damn car! If I have fuel and spark that rules out several sensors right?

One thing that I'm confused about is when am I suppose to hear my fuel pump turn on because I only hear it turn on when I crank. Can someone please school me in the MPI relay because now I'm thinking maybe its that?

Ah I'm at a loss now someone please help!

 

[Musashi450]

So I'm going to make a list of the things I've checked:
MPI relay
Timing (Perfect)
Spark plugs
Fuel injector resitance
SAFC taken out
HKS TT taken out
Fuel pump turns on with constant power
All fuses checked
Fuel pressure at rail during cranking (NOT when turned to on position like it used to)
temp. sensor (reads correct temp on pocket logger)
Battery
Starter
Alternator
Compression (150 across)

Still need to check CAS, crank angle sensor and last but hardly least, ecu

For those of you just tuning in, got spark and fuel but I'm dumping fuel and drowning the car. When the computer fuse is pulled, the car turns over and runs like complete crap. Car used to start and out of no where, no start. Car does crank strong so its not battery/charging related. WHAT THE HELL IS THIS!
-Chris

 

[RedRain]

Are you getting enough air flow or to much air flow in your engine? Check your air filter, lower and upper piping and check to see that your throttle plate isnt shut closed or stuck open all the way.

 

[Musashi450]

Ok I fixed the problem and although I am soooooo happy, I am compelled to not post the solution because of its stupidity. So whats the moral of the story you may ask?

CHANGE YOUR SPARK PLUGS! GO CHANGE THEM NOW!

If your usings NGK -7es and you are having problems, go change them. If you have a gap of .028 on them and its this cold go change them. If they are even the slightest bit fouled up, go change them. I dont care if your grounding them to your valve cover and your getting a nice bold, blue spark GO CHANGE THEM.

Seriously though, if you are having a problem in this cold, and your are getting the magic components, spark AND fuel and you've checked out your temp sensor, consider your spark plug gap and what your plug is meant to operate. Now that I feel stupid and humbled, feel free to flame shoot me down, cuz in all honesty I deserve it!

All yours defiant
-Chris