I have an issue of no start. Been getting some help through out Facebook forums as well and it helped but it wasnt fixed. So to get to the point. Car sat for years almost a decade. Changed fuel pump, fuel filter, has an msd distribuitor with new magnetic pick up and new ICM, msd ignition coil tested and is good, has a holley adjustable fuel pressure regulator. So as far as I can double check I have. I get good fuel pressure at prime but it just keeps dropping may be the adjustable fuel pressure regulator. With the oem it held im thinking its the diaphragm. But it will just crank over not even a stumble of sign that it wants to attempt to fire. Initially I could get to to start by manually moving the distributor and someone cranking the key it wouldn't stay on but I could force it by giving it throttle. I may be to stressed to see what I have missed or done wrong. Any input would help I know every situation may be similar but sometimes very different.
based on common sense i know you need fuel, spark, air, timing but nothing is adding up.

 

sounds like you answered your own question. fuel pressure keeps dropping. what do you mean by that? how do you know and what does it drop to?

 

Have we tried manually administering fuel?

 

So yesterday night after the post. I went back removed the super ram top plenum. I removed the holley adjustable fuel pressure regulator and installed the oem. It still did not hold pressure at the rail. I suspected possible fuel injector leaking. Fuel pump is a new spectre but even new stuff fails. So installed some new to me used old style injectors. And I took a brake. I ended up braking the porcelain on the spark plug yes again for sprak plug on cylinder 1. Triple checked tdc and distribuitor. Now I need a spark plug, and now possible fuel pump. And from the looks of it cant get a replacement diaphragm for the holley adjustable fuel pressure regulator.

 

If it’s the **** style regulator, this is the response Holley sent me a few years ago
I was able to find an internal part number for the diaphragm assembly. Part number 35R1998A. This is not a retail part number

 

this is the same kit i have its old but been stored. Im sure they dont sell a replacement diaphragm. Just like they dont sell the magnetic pick up coil on the msd distribuitor since holley and msd are parent company's now.

 

That’s the part number I provided. Call Holley and give the engineering part number.

 

84661 msd. ?

 

A stock regulator can be made to work 😆

 

https://ebay.us/m/4z3nXM

cheap to buy and easy to modify

 

So im at the wtf point. Brand new distribuitor and remote ignition coil. New injectors, tried to start it up crank over till the battery dies after so many tries. It will not fire or attempt to stumble fire. I spray starting fluid in the throttle body will not fire. I have a spare ecm no change in issues. Checked the grounds are all tight and good. I also try and disconnect the maf sensor no change. I check for codes but are all good checks throwing code 12. I thought I would have it fixed by changing these things. So mentally stressed over it. Nothing makes sense it should have fired up.

 

If it won’t pop off starting fluid, it has to be timing or spark or valves misadjusted I forgot if you had done anything with valve adjustment. Are the plugs fuel fouled ?

 

I had set and double checked dtc on piston #1 about 4 times. The valves were installed with some after market slightly better than stock roller ones. Factory ratio. But thats stayed as is for about many years. I pulled a spark plug #3 i could smell a burn like fuel smell had my dad start the car and can see it spark the first one was a strong spark but then it was a slight one but it was blue in color. My dad suggested it was out of timing or in the incorrect timing. Spark would have started or ignite the fuel at some point.

 

I had set and double checked dtc on piston #1 about 4 times. The valves were installed with some after market slightly better than stock roller ones. Factory ratio. But thats stayed as is for about many years. I pulled a spark plug #3 i could smell a burn like fuel smell had my dad start the car and can see it spark the first one was a strong spark but then it was a slight one but it was blue in color. My dad suggested it was out of timing or in the incorrect timing. Spark would have started or ignite the fuel at some point.

 

Are you using the plug to check spark or a spark tester ?

 

I've used both methods. They both show signs of spark. But looking back at the spark plug. Looks to be fuel fouled.

 

Besides drying the spark plugs and trying again. Pull the 2 injector fuses and disconnect the est wire. Use a timing light on the number 1 wire. See if timing seems way off when someone cranks over the engine.

 

Has the distributor been out since it last ran?

Are you SURE you have it on the right instance of #1 TDC? After all, #1 comes to TDC TWICE during each engine cycle; once which is firing, and the other which is the end of the exhaust stroke and beginning of the intake stroke (which is also #6 TDC and firing). The engine won't run if the spark occurs on the other instance of TDC.

 

I will have to borrow one if they have it at the autoparts store loan a tool.

 

ive checked it more than 5 or 6 times to confirm. You will only feel compression on the spark plug hole for cylinder #1 with your finger on the spark plug. But yes you are correct. Ive re checked it this morning. And I swapped out the msd distribuitor and ignition coil with generic Amazon parts msd feels you have to buy everything vs just selling you that one part you need. They dont sell the magnetic pick up coil by itself they sell it with the icm which I have a few of and the price of $160 or more nah. So I went with a generic with good reviews.

 

Driver side bank spark plugs

 

The bottom looks like it could be wet. Does it smell like fuel ?
if it does I’ve dried spark plugs with a lighter or small torch. Lay them on a bench and heat the tip or hold with pliers.

 

Passenger side spark plugs

 

they did smell like fuel and burning. But there is a different spark plug part number for the corvette 113 aluminum cylinder heads. And I just decided to replace all 8 with the correct part number ac delco FR5LS