I think that my fuel pressure regulator may not be working on my 87' 5KCST.

Has anybody removed this and cleaned it without F@#$%ing it up?

I want to see if I could maybe clean this out and put back together, it might correct my hot start problems.

Just a thought.

LarryF_in_Ca

for your HOT start problem?
I've been reading your posts but the things youve been checking don't get hot. i would tend to look around some of the engine components that are susceptable to heat failure or injectors.
Sorry for re asking if you've run down the symptoms already, but is is it hard to start after sitting for a while like driving then parking at a parking lot and coming out to start it an hour later or ten munites later or right away ater shutting it off and restating it again?
How hot is the engine getting? are all the fans and and injectors cooling fan coming on? Does it not start at all or can you tell if it's trying to but having difficulty. Usually if it sounds like it's trying to, then the ignition is working and is a fuel problem instead.
Just trying to pin down ign or fuel.

CARNPLANES,
I start the car and can drive it for around 10 mins, the car runs great.

When I stop the car in my driveway, it refuses to startup. I will have to crank the car for around 1 minute, and only sometimes the car will stumble back to life.

When starting cold and hot it has problems, it sounds like the car is starving for fuel.
The car needs to be cranked for several seconds in the morning, but it does tend to start eaiser in the morning. Hot starting will take around a full minute or so, but mostly refuses to start.

Here is a list of used parts that i used:
used distributor
used fuel distributor
used fuel accumulator
used rpm and crank sensors

Here is a list of NEW parts:
new cap and rotor
new spark plugs
new fuel filter
new fuel pump
new bosch injectors
new costco battery (with vent tube :))

Here is a list of parts from what I have troubleshooted need to be replaced:

injector fan cooling switch
I tested it in boiling water, it is bad

afterrun temp switch
Can short out the leads, rad fan and afterrun pump will turn on.

Intake boot
is being held by duct tape and the bottom is hard to seat, not sure if it is 360degs fully seated, but the car does start.

From my list of used parts, which are commonly effected by temp.

Let me know what you think.

LarryF_in_Ca

Did you change them for this problem? I'm thinking because you didn't mention an adjustment of the co, that maybe your idle mixture screw needs to be adjusted (the 3 mm screw for the airplate). It may have been adjusted for the previous injector operation but now that you have new injectors, needs a new adjustment. Unless you have equipment to do it, you might have to go somewhee that can hook up and test. Test port is the pipe with the blue rubber cover/plug on the side of the Intake manifold above the o2 sensor.
Idle mixtue adjustment affects all ranges since the screw adjustment raises or lowers the plunger a certain amount, affecting all ranges.
On a hot engine, the engine needs more fuel because the excsessive heat vaporizes what fuel you have coming in and therefore requires a little more richness. If you're already alittle lean to begin with, then you going to get hard starting. The CSV doesn't enter into this because it is over the temp for operating and therefore relies on the 5 injectors soley, so the mixture has to be just right.

I checked them in a bucket and some sprayed decent, while others had no spray, they were sort of like a straight shot or stream of gas.

I decided to change them due to the hard starting and it wouldn't hurt the car. (I plan to make this a daily driver :))

Before I replaced them, and the car started for the first time, it ran ok, but there was lots of black smoke comming out of the tailpipe, I figured that this was an indication of bad injectors so I replaced them.

I do not know if the CO was adjusted, but from looking at the air meter box, the plug was missing so I plugged it back up.

How much does a job like this cost ?? Have you had your car CO tuned ?? Is this something that I can do, or do I need a specialized diagnostic machine to test the CO.

Let me know.

LarryF_in_Ca

before making any adjustments. Read through the link of SJM Auto.... It requires you to hook up a multimeter and essentially, you check the duty cycle of CIS frquecny valve by hooking up to a plug located behind the intake man. I think it's about 46% and open loop is 50%. To even have an engine that starts, the reading should be between this value. There are AFM(Air Fuel Monitors avilable for home use. SMALL adjustments of the 3 mm screw translate into large changes, so be careful. Best to check what you have first.<ul><li><a href="http://www.sjmautotechnik.com/trouble_shooting/injector.html#mixture">http://www.sjmautotechnik.com/trouble_shooting/injector.html#mixture</a</li></ul>