hi Ron et al,

thanks All for advice so far; i certainly understand that to fix & troubleshoot something you have to understand how it works, this is the premise of anything even my daytime job. I have haynes manual applic to 120, 130 & P1800 sports models to help me. I have been reading and researching this book for approx a couple of years now before giving up and searching various boards for help, this one appeared to be the most helpful and active.

so this is where i am up to last night:

disconnected fuel return hose (fuel out - for clarity this is the one that is attached to the under side of fuel pressure regular correct?) with ignition on, i get fuel belted out into catch can and a pressure of 28lbs on gage which is constant with line disconnected. I am assuming because this line is open and i have a constant pressure reading, the fuel lines are not mixed up or crossed, meaning if i disconnect on the high pressure (fuel in) side, the reading on the gage will instantly fall to zero. The 'fuel in' line connects directly to the metal fuel line close to injector #1 whilst CSV connects to fuel line opening close to inject #2.

secondly,

with gage reading of 28 lbs, i disconnected all 4 injectors from the head and put little cups to catch any fuel, i do not see anything yet.

as pointed out i really would like new seals, i had to re use old ones as the ones that came with VP no name injectors were useless. Before joining board, i was testing firing and leak down and even before i released injector hold down, a couple injectors had popped up, so any seal they were providing can be assumed to be hopeless.

I am really stuck as to what seals to order, the injectors that showed up from VP, do not stick down as far as the bosch originals. Does anyone have any ideas here? Is the fact that their tips are higher up in holder detrimental to starting or is that a performance only factor? I m guessing here, hence i hate using aftermarket parts.

The areas around the injectors and connections are all dry so far.

I have checked the plugs after cranking and all are nice a wet - a good sign!

so next steps:

suck test on pressure sensor
obtain clear tubing and test cold start valve operation - replace if necessary
i will recheck firing at TDC on cyl #1 to confirm timing

from what i have seen so far, i m assuming fuel pressure regulator is good unless anyone can chime in otherwise. It adjusts within range of 20 - 40 and from gage reading is steady not fluctuating, it is also leak free.

I think areas of weakness are:

1. clean up di electric grease - however i have confirmed all 4 inj are firing
2.the CSV
3.injectors seals - the ones i am using are around 44 years old

are signals from the air temp and coolant temp really that needed for starting like pressure sensor?


thanks all for your valuable input to date, more to come this weekend for sure!

Rob



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Rob