Originally Posted by
mangle
Not my week this week...
Saturday, we're driving up Togwotee pass in the girlfriend's Volvo S40. The thing has made several runs over Teton pass in the previous week or two, no issues. All of a sudden, it feels like it's losing power. I wonder aloud, "Is there a serious headwind?" Dash flashes "Warning, pull over." I say, "WTF, ok," then temp gauge shoots from normal to full range hot, all the dash lights warning lights come on, and it dies. Now no compression on three of five cylinders. Head gasket is toast, probably motor, too. I had noticed a hint of coolant smell the day before. WTF.
So I let the girlfriend take the obnoxious cammed LS swap 1975 Blazer drag 4x4 to work on Monday. She drives it in, runs a few errands throughout the day, everything is fine. I think she kind of enjoys the attention. So I get a call at about 7PM, "Blazer is dead. I'm on the side of the road. It's snowing." Fuck, ok. AAA to the rescue, tow it five miles home. Immediately suspect fuel pump, as it'll fire and then die. Girlfriend grabs a fuel pump for me on Tuesday.
We're down from two perfectly good daily drivers to zero in three days. All my other cars are in storage for the winter or on the east coast. Great.
I put a fuel pressure gauge on the truck today, ignition on, ok fuel pressure. Crank it, runs for a sec, dies. Fuel pressure zero. Definitely a fuel pump I think. Pull out the jack, piece of plywood under the tank, loosen the hoses, disconnect electrical leads, drop tank (which has ~30 gal of gas). Except I stopped half way to check things and accidentally pull the jack handle out of the jack. That's under the truck. Grab breaker bar, bring the pump handle slot down far enough to get the handle back in. Lower tank. Fight with lock ring, replace pump, button it all back up, jack the tank back up, tighten straps with my lovely new Dewalt electric 1/2" impact wrench. Reconnect everthing. Ignition on, FUEL PRESSURE!!! Fires right up, dies shortly after. Key back to on, no fuel pressure. Fucking hell. Oh, and it's snowing hard and I'm in a parking lot.
Tonight the girlfriend gets home. I'm curious, so I have her turn the truck to on while I'm under it, now in a pile of snow, with a multimeter looking at the fuel pump lead. Nada. Is my ground good? No idea. Give up, I'll do this in the morning.
Get back inside. I wonder if the fuel pump relay is good? Go back out (snowing hard now), grab it, connect to a power supply on my workbench, relay tests good. Fuck. Hook up power supply leads to old pump, immediately turns on. Damn it.
So right now, it's definitely an electrical problem. Gas guage works, so I'm pretty certain it's not a bad ground (they have a common ground in the sender). It's either a wire that got chafed or burned somewhere (entirely possible), another fuse, a royally fucked computer (I do have a spare...), or one of these things plus a DOA pump.
At least I have beer.