Compression Ignition Addict
Join Date: Aug 2011
Location: Carlsbad, nm
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Finally got her to start when cold! Simple fix!
I have a '95 7.3 PSD and since I got it, she has always been hard to start when it was below 50*. I looked at everything and replaced parts. I was at my wits end and everything was pointing to bad injectors. I bought the truck cheap and have since doubled the money spent on it.
I looked at everything and have been trying to find someone with a tester that will do a buzz test. I still want to do that and maybe some programing, but that is later. If anyone has one they could part with, I might be interested.
I was looking up youtube videos for the powerstrokes just to try and get any ideas and ran across a video where a guy was changing his HPOP oil. I know that the oil is supposed to cycle with the motor oil, but got thinking of "what if the orifice is plugged?"
So, I pulled the plug off the HPOP and the oil was blacker and thicker than I have ever seen an oil before. I used a vacuum pump pump, sucked out the old oil (which took about 30" of vacume!) and finally got it drained.
When I refilled, I also included 1/2 bottle of sea foam (love that stuff). Started the truck and let her run for about 1/2 hour.
I then drained it again. Oil sucked out a lot easier but was just as black as before. So I did the sea foam again and filled it again. I decided that I would leave the sea foam in and change this oil again when I do the engine oil which is coming up in the near future.
So, it was a cold night for us in southern New Mexico at 30*. Truck sat overnight and it is very humid and foggy this morning so itr felt colder than 30. Went out to the truck, cycled the glow plugs 3 times, and she started the first go. She also sounded better that she ever has on a cold start since I bought her.
Also, she was drivable after just 5 minutes of idle (without being plugged in) where as before it would take 20 - 30 minutes before she would throttle up. Before, even being plugged in it would take 5 minutes before she was drivable
I just wanted to post this to say that the oil should change itself but don't always trust that it's going to. This $30 repair saved me hundreds and it may do the same for someone else. Hope it helps spomeone else.
By the way, it also helped the throttle response and performance. Can't wait to see if it helps with mileage also