CK5
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Papa’s Truck

1990 Chevy C1500
Pulled the plastic bed liner out today. First time the bed has seen light in 36 years. Iirc, the liner was installed by the dealer. Some rust but its surface rust even on the wheel well. I’ll get it sanded and primered and call it good as it’s getting a spray in liner.

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Where did you get it? I just picked up a pretty clean '98 extended cab for my soon to be 15 yr old. Haven't looked at the weather stripping yet.
 
Well darn. Took the truck on it's first extended drive. 8 miles round trip speeds up to 55mph.

Motor likes to climb to 210* while sitting at a light and doesn't cool off all that much while driving. Water temp gauge suddenly decided to start working again or at least it's bouncing around now. Might have been the factory sender wire grounding out while truck was bouncing around. Weird it chose just now to work and not while I was testing it. I'm leaving the aftermarket gauge in for now.

Transmission also feels like it's locking and unlocking the converter. You can feel the truck twitch and hear the engine unload and load. Doesn't do that under 45mph but above you can feel it. I don't think it's a miss in the engine as it's to long of a feeling. It's like a half second pause.

The springs are so shot as are the shocks that the stock size tires rub when turning and hitting a bump.

So now we start the game of keeping an old truck on the road. I'm gonna start with cleaning the radiator fins and then scheduling it at the shop for a coolant and trans fluid and filter. I put a new t-stat and cap on it but no clue how old that fluid in either of those two items are. I'll check the TV cable on the trans and see if it needs some adjustment but I don't hold a ton of hope on that. I know it's been rebuilt sometime in the last 10-15yrs but zero clue on what that means or how many miles or abuse or maintenance.
 
check the brake switch adjustment, if it is boarder line adjusted the pedal vibration might be enough to actuate the switch.

Check that fan clutch, look for debris blocking the rad esp between the condenser and rad
 
Was reading on the brake switch thing. Fan clutch was also on my list to check. It looks factory so it’s probably done for. Also don’t hear it spin up when I cold start the motor so good sign it’s done.
 
Give your mechanical fan a front to back tug and try to spin it with a cold engine. I think you are doing the correct stuff because it is needed no matter what to base line things. But the high school kid I talked with you about a few years ago concerning the 4Runner ended up with a ‘88 Chevy truck. He had the exact same temp issues you are having. Radiator, thermostat replaced and he ended up having a bad fan clutch that basically did nothing.

Then he called me a few months ago stuck dead on the side of the road with his parents out of town. He said it just turned off while he was driving. I towed him home and couldn’t hear the fuel pump if he turned on the key. He hadn’t replaced that yet. I couldn’t stay to do more. His dad called me later to say they had fuel psi but no spark. The distributor was wallowed out inside. New distributor got it running again. I’ve read this entire thread but can’t remember if you did more than plugs and wires. Just something to keep in mind if it just goes dead some day.
 
unfortunately these tbi distributors wear poorly, and it is a common maintenance item.
 
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