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  1. Matt69olds

    Trailer wiring on a 77 K5? How do I do that?

    Crap, I took a screen shot of that exact part, but forgot to share it. That solves part of the no cutting trailer harness issue, the OP wants a 7 pin plug.
  2. Matt69olds

    please recommend a transmission dipstick that isn’t junk.

    Last time I needed a dipstick I ordered one from summit. It was around 45 bucks, and didn’t use those junk orings. The boot type seals are MUCH more forgiving.
  3. Matt69olds

    Trailer wiring on a 77 K5? How do I do that?

    To put a 7 way trailer plug on that is going to take some minor wiring. I don’t think they ever offered a factory tow package with 7 pin trailer plugs. If the taillight harness is intact, cutting it would be a last resort. And if you do cut it, DO NOT USE CHEAP BUTT CONNECTORS!! Use good...
  4. Matt69olds

    1985 C20: Carb not getting fuel

    I have no clue how much fuel a Q-Jet float bowl will actually hold. I’m guessing a 1/4 cup or so.
  5. Matt69olds

    1985 C20: Carb not getting fuel

    Fill the float bowl with fuel. Try and start it. With the float bowl full, it should run long enough to pull fuel from the tank. If not, check the fuel lines. Make sure you don’t have one kinked, or corroded.
  6. Matt69olds

    Engine light comes on while driving

    I wondered the same thing!!!
  7. Matt69olds

    Tq converter for 5.3 ls swap in a 700r4

    I agree. Seems counter productive to upgrade to a modern engine and give it a lobotomy with a carb. Especially considering how expensive those ignition computers can be, they aren’t much cheaper than a pcm to do everything.
  8. Matt69olds

    Instrument cluster questions on new build

    There are different sending units based on gauge readings. Meaning a gauge that reads to 60psi, requires a 60psi sending unit. I ran into this years ago with a Grand Prix I had. The factory gauge registered to 80, the 455 Olds I swapped in had a 60psi sender. The gauge was NOT accurate. If...
  9. Matt69olds

    Need help with my freshly rebuilt carb

    It’s been 30 years since I messed with setting the mixture control solenoid on those carbs. If I remember correctly, there is a green connector somewhere near the carb where you put the dwell meter. Basically, you raise the engine rpm to 2500 (I think) and set the metering rod stops so the dwell...
  10. Matt69olds

    Under Dash Wiring Mystery

    It’s been a while since I put cruise on my truck. Let’s see how good my memory is!! The connector with the pink, black and yellow wires are part of the cruise control harness. It uses the signal from the vss to command the servo for throttle position. Somewhere in that cruise harness will be...
  11. Matt69olds

    TransGo shift kit install...

    Those pans with the cooling fins work well, but are a pain in the ass to clean. All the clutch debris collects under those tubes where you can’t get to it. As for the leak, there are lots of other places the fluid could be coming from. Look around the dipstick tube, the kickdown cable...
  12. Matt69olds

    High oil pressure after replacing pump

    There’s nothing to worry about with your oil pressure. If it will ease your mind, next time you change the oil, cut open the oil filter. Look in the pleats, if you see no metallic debris, relax. Use tin snips to cut the filter open, it’s hard to tell what is engine debris from shavings from a...
  13. Matt69olds

    rough idle

    If you ran it out of gas, and the problem started immediately after refueling and restarting, it’s probably got some trash in the tank or lines that got stirred up after refueling. You might be able to clear the crap out of the float bowl by pinching closed the rubber supply line to the pump...
  14. Matt69olds

    Under Dash Wiring Mystery

    The ribbon cable on the green book leads up to the optical speed sensor inside the speedo head. There is a wheel with slots cut into it, the optical speed sensor counts how many times it “sees” the windows in a certain amount of time. It then uses that to calculate speed. The 3 wire connector...
  15. Matt69olds

    Under Dash Wiring Mystery

    The green box is the VSS (vehicle speed sensor) buffer. Don’t throw it away, you will create more headaches. Look for a ribbon cable that runs up to the speedometer. One the opposite end of the box, you will find a place for the plug with the pink, black, and yellow wires. The speed buffer...
  16. Matt69olds

    1986 Automatic Transmission Leak

    The seal is called the manual shaft seal. Some people call it the selector shaft seal. Go to your nearest transmission shop, chances are they will have one. There is a cheap tool you can buy to replace the seal without removing the transmission pan, otherwise you need to drain the fluid and...
  17. Matt69olds

    Avs2 problems

    Take off the distributor cap and rotor, make sure the advance weights are free to move and return to their resting spot. If you adjust the idle speed with the weights slightly advance, when the return to their resting spot the idle speed will be lower. If after driving the truck the weights...
  18. Matt69olds

    Engine oil lines.

    I’ll leave the oil cooler block fitting discussion the the Chevy experts. Assuming the fitting can be removed from the block, anyplace that makes hydraulic hoses can probably make exactly what you need. As someone pointed out, I wouldn’t drive the truck like that. If you have a line come...
  19. Matt69olds

    Help! My coolant temp heats up fast in idle or slow-moving traffic (around 210F+) then decreases when I start driving (around 170F-190)

    First, 210 at idle isn’t terrible. If that’s as hot as it gets, I’d say you’re trying to fix a problem that really isn’t there. Make sure the fan clutch works as it should, and the shroud fits well. You can easily test the fan clutch, throw a heavy blanket over the front of the grill (make...
  20. Matt69olds

    Electric fuel pump

    Without a doubt. Holley has enough quality control issues on their own, you don’t need the added headaches of an external fuel pump.
  21. Matt69olds

    Electric fuel pump

    Are you SURE the float level is correct? It needs to be just below the sight glass window, if you shake the truck fuel should just dribble out the window. Once you’re sure that’s good, drive the truck until the engine is good and hot, then shut it off. Wait a few minutes, check the float level...
  22. Matt69olds

    Modern trailer controller wiring details

    Make sure the controller signal wire is connected to the white wire of the brake switch.
  23. Matt69olds

    1987 R10: TH400 to 200-4R swap (mostly wiring??)

    The computer won’t care if the kickdown wire is disconnected. Somewhere there is a switch on the carb or throttle that sends power to the kickdown solenoid. I think on some of the later trucks the computer sends a signal to a relay which disengaged the A/C compressor and energizes the kickdown...
  24. Matt69olds

    1987 R10: TH400 to 200-4R swap (mostly wiring??)

    Look up TCC wiring for a 700 swap. The TCC works and installs in basically the same way on a 200R4, the pressure switch is obviously in a different location on the valve body.
  25. Matt69olds

    A Technical Comedy [Only After the Fact]

    Friend of mine locked his keys in the ignition in his Chevelle. He crawled under the car, pushed off the sheetmetal he had covering the hole in the floor, reached up and pulled them out of the ignition. Many years ago, I attended the Woodward Avenue Dream Cruise in Detroit. Dumbass me left...

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