When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a '95 PSD, I just put all new glow plugs in it. It was about 5 degrees out this a.m. The truck did start but needed to crank it for 5-10 seconds to get it going. Whats my next thing to look at? I have only plugged this truck in if I was out plowing, came home to get some sleep for a couple of hours and wanted the truck to be warm when I went back out. This truck would always fire right up regardless of temp. It has about 180,000 on it.
Glow plug relay. I replaced my glow plugs first and still experienced hard starting. I was cycling the plugs two or three times... The relay solved it like a champ! The old one looked fine but apparently the inside was burned up pretty good. My truck starts even faster in the cold when I put in a diesel additive to the fuel. I think Diesel Kleen (spelling?) is what I used last time, it smokes less too upon startup.
Batteries are great. Cranks over real good. Glow plug relay? Isn't that either good or bad? Last few times it has gone truck would not start at all in the cold weather. Didn't think it could partially fail?
I'll add a vote for the glow plug relay too. A quick way to know is to short the two large terminals together with a screwdriver for 20 seconds or so (it gets hot). That completes the connection that is supposed to be made inside of the relay. If it fires right up after shorting those terminals then the relay needs to be replaced. If it's still slow to fire have the batteries checked. They need to be in great shape to power everything that draws on them at startup and still have enough juice left to crank it fast enough to fire off. Many times low or old batteries will sound like they're cranking over just fine but when new ones are installed the problem with hard starts goes away.