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  1. Matthew Jeschke

    PCM delivering wrong fuel mixture?

    This has been extremely difficult to track down. My truck is starting to get horrible mileage. I am building it and changing quite a few things along the way. I had issues with the evap and thought that might be it too. I revered my tuning changes to a point where I knew I had better mileage. I...
  2. Matthew Jeschke

    Tool to make quick disconnect flare on metal hose?

    I bought that big trans cooler from trucool. It works AWESOME, but fits like $heet. A guy makes a metal bracket to mount it which is most of the job but needs spaced out from core support as ambient air sensor rubs on condenser and the trans lines fit like CRAP. You have to tweak the trans...
  3. Matthew Jeschke

    Reinforce upper core support mount (fender)

    I need to come up with a unique way to reinforce the upper core support mount. It currently ties into the fender but I've wrecked a fender already. I go off road, and might have been I didn't tighten up the bolt? Not sure, but I started to hear a noise, thought it was the dash but it was the...
  4. Matthew Jeschke

    Aluminium vrs steel driveshaft

    My 2001 Tahoe setup has a steel driveshaft. I've been curious why GM / Chevy switched to Aluminium. I'd think they'd break easier? I see claims they make better gas mileage but wouldn't that be EXTREMELY minimal. Like a 1/10 of a MPG maybe? They are lighter but all the mass is near the center...
  5. Matthew Jeschke

    Can you identify these fuel tank parts?

    I posted about this in a different thread on changing my fuel pump... A while ago I dropped my tank to change the fuel pump. Well I get a gas smell occasionally. I think it's really the PCM delivering too rich a mixture (separate issue). However, I did go through the evap system and manage to...
  6. Matthew Jeschke

    Bleeping QD lines to evap / fuel system

    I've done some work to my Evap system. Truck occasionally wreaks of fuel though so I'm back into it. I've replaced everything except the lines (I think are good) and canister. I just pulled the canister to test it. All besides the point, these...
  7. Matthew Jeschke

    PCM chassis grounding locations?

    I have a pinout for the PCM but curious if anybody knows which chassis grounds are closes the PCM / tied into the PCM. As well as the Aux power. Backstory: I tuned my truck. Wired up wideband and ran it off aux power with Cigarette power adapter. I noticed when the watching the wideband w/o...
  8. Matthew Jeschke

    Welding broken fender

    I'm a terrible welder, but have that itty bitty $100 harbor freight 110V welder. I've done a few things with limited success. Most recently my passenger fender broke where were the core support attaches. It ripped off right around the bolt. I welded it back up and my welds didn't hold. I had...
  9. Matthew Jeschke

    Drilling a hole for cable gland in firewall

    I previously used the factory gland on the driver side of the firewall. That was a NIGHTMARE. I'm thinking I need to drill a new hole for my new wideband O2 setup. My first thought would be to drill where the slave cylinder would be if I had a manual transmission... Any thoughts?
  10. Matthew Jeschke

    Corvette exhaust versus truck exhaust

    I have a C5 corvette in addition to my 2001 Tahoe w/ built LQ9. My Corvette is nicely equipped too... but my question is I wonder if any of the exhaust parts are feasible on the truck. Specifically, the LS1/LS6 manifold design looks a bit better? I noticed GM seems to have discontinued the part...
  11. Matthew Jeschke

    Swapping Gen 2 dash to Gen 3?

    Has anybody done this? I'm not even sure if is possible... I have completely rebuilt my truck, even tried to restore the interior. But I cannot kid myself, the interior on these trucks is absolute heaping pile of junk, lest the seats. The trim is all low grade plastic and cheap connectors. GM...
  12. Matthew Jeschke

    Copy PCM to swap in a new one with Tech 2?

    This actually isn't for my Truck but think it's the same process regardless. It's for my 1999 C5 Corvette. I think the PCM is shot (bench test isn't passing long story). I am going to buy another PCM I know I can either (1) buy from somebody who can program VIN or (2) buy license for PCM I buy...
  13. Matthew Jeschke

    Where to buy crimps for big three upgrade?

    This is probably on the forum somewhere but I cannot find it. I need to buy crimp terminals for big three upgrade. Specifically this: GROUNDS: Engine block and chassis grounds replaced, need to splice them together and have a single terminal to battery post (side post) Battery Positive: I...
  14. Matthew Jeschke

    Junkyard windshield

    My windshield is getting bad. It has a bigger crack in it now. Sooner or later it will need replaced. I asked the junkyard for the heck of it last time I was there what they wanted for the glass. They said they'd sell me a windshield for $40! I've done every solitary thing on my truck so far...
  15. Matthew Jeschke

    Move Transfer Case encoder motor to 2wd???

    I pulled my TX case. When I pulled it, I had it in 4HI. After cycling power to vehicle w/o encoder motor on the computer went to 2HI mode. Now if I turn the TX case to 4HI position then install the encoder motor, the computer thinks it's in 2HI, when the transfer case is actually in 4HI. I am...
  16. Matthew Jeschke

    1999 C5 Corvette no speedometer

    About to cry. I have my hot rod stored for years. The bleeping battery boiled and leaked on wiring. I've got most of it all fixed up. However, the speedometer will not register. It passes self check, and scanner shows a good VSS signal to PCM. However, the signal is not making it from the PCM to...
  17. Matthew Jeschke

    Portland Electric Pressure Washer Hose Specs???

    I've owned a few of these electric pressure washers. They work great for cleaning a car. Not too much pressure they strip the paint off. Long story short, where they're TERRIBLE is in construction of the sprayer. The bleeping sprayer always goes bad. I bought a different sprayer to try and use...
  18. Matthew Jeschke

    Transmission connector broke on 4L80E

    I have a friend with a 1993 3/4 ton Suburban. It has the 454 and 4L80E transmission (or heavy duty). I don't know much about these years or those builds to be honest. I maybe way off. They sent me pictures, it looks like the transmission connector broke off on the engine / chassis side of the...
  19. Matthew Jeschke

    Lost rubber seal for my TPS connector

    I want to scream... It was one of those honest mistakes. You know if you drop it you'll never find it so you're careful and it happens anyways. The rubber seal on the end of my Throttle Position Sensor connector fell behind my water pump. I don't have any way to get it back out lest I pull the...
  20. Matthew Jeschke

    Strut mounts replaced correctly?

    Okay so this is going to be confusing to explain. I also have a video below as well as pictures of what the replacement mount looks like. https://photos.app.goo.gl/jfXzhatnWp55tkum8 There's a profile / ramp where the spring seats on it. This ramp floats. It didn't on the factory mounts. I'm...
  21. Matthew Jeschke

    6.0L Fuel pump?

    As many of you know, I did the 6.0L swap. I can start the truck no troubles with some tuning now. However, if I drive to store say, buy some groceries, then try to start the truck it doesn't want to start. I have to crank it quite a bit. I assume the fuel pump is struggling once it's been heat...
  22. Matthew Jeschke

    Pulling off the Perfect NP246 Transfer Case Rebuild

    The next item on my to do list is rebuilding a NP 246 Transfer case. I bought a spare on just to do this. I need to disassemble it and get a better idea of what's involved. Bit nervous as well as I have original pumpkins in my differential housings and old Transfer Case in my truck. Those are...
  23. Matthew Jeschke

    Random NBS / LS parts from my build

    I have replaced most everything on my truck. Many parts I pulled were good or I ended up with extras from the junkyard. I want to pass this stuff on as it's rapidly accumulating in my garage and I hate to throw it away. I am putting photos on google below...
  24. Matthew Jeschke

    Which Knock sensor is P0327?

    First there are two knock sensor fault codes. One is for Bank one, the other for Bank 2. However, both sensors are located directly in middle of the valley. We're getting code P0327, anybody know if that's the front knock sensor or the rear knock sensor and which sensor is which on the harness...
  25. Matthew Jeschke

    My ultimate 6.0L truck engine build

    I'm getting some questions on my engine build / swap. It's a BEAST love the motor! Goals: Swap the 5.3L for a 6.0L without sacrificing too much if any efficiency. Optimize for part throttle response, low end torque. I mainly road trip and explore rough forest service roads in South West...

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