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  1. MackAttack

    Fuel Pressure Test

    ooooh ok awesome. I’m starting to think it’s the fuel pump in my opinion. Randomly the car bogs and feels like it’s struggling for some reason. It’s the same feeling as if the car is about to run out of gas, and randomly the car feels extremely sluggish or feels like I’m towing a ginormous boat...
  2. MackAttack

    Fuel Pressure Test

    I have been seeing all sorts of different numbers all over the internet so that’s why I was kinda confused. Sorry I forgot to mention, the truck is a 2009 Chevrolet Suburban 1500 LT, 5.3L V8 Naturally Aspirated with Flex Fuel and is not hybrid. Although I wish I bought the hybrid one in 09
  3. MackAttack

    Fuel Pressure Test

    I did do work on it, I replaced the entire cooling system. I was suspecting something else also, when me and my friend were checking the pistons of the engine by removing the spark plugs to see if it was burning oil, one broke. We then dug around in his truck until we found and old crap spark...
  4. MackAttack

    Fuel Pressure Test

    Ok awesome let me check my grounds and electricals ans get right back to you guys. It stays at about 50-60 psi for a little while then will drop to the low 40’s. I was thinking if I might be a spark plug? I noticed when I killed the engine, I heard a faint “hissing” sound from the engine bay...
  5. MackAttack

    Fuel Pressure Test

    Ah ok. Some of the forums I’ve been in have a maximum number of replies, not really sure how it worked here
  6. MackAttack

    Fuel Pressure Test

    Ok just ran the test. Turned the key to the “on” position, and the PSI jumped to 50. Turned the engine over, and it jumped to 58-60 PSI even the first 2 starts where the engine kept dying. The second I killed the engine, the psi instantly dropped 8-10 PSI (50 ish). Turned it off, left it for 30...
  7. MackAttack

    Excessive Cranking/Transmission Issue

    Ok just ran the test. Turned the key to the “on” position, and the PSI jumped to 50. Turned the engine over, and it jumped to 58-60 PSI even the first 2 starts where the engine kept dying. The second I killed the engine, the psi instantly dropped 8-10 PSI (50 ish). Turned it off, left it for 30...
  8. MackAttack

    Excessive Cranking/Transmission Issue

    Alright I’m about to do the test, when I hook it up, what should the pressure be at? If I remember I think it was 55-62 psi for the 5.3 right? Also, how would you guys like me to record the data, and how much psi should it maintain without going back down Mack :)
  9. MackAttack

    Excessive Cranking/Transmission Issue

    Also for the Cam Posit Sensor, I had a OBD2 port scan today and the only thing they could find was that the Coolant Temp sensor was bad even though I replaced it (my other post). There is no check engine light or anything. Can the OBD2 pick up a bad CPS?
  10. MackAttack

    Excessive Cranking/Transmission Issue

    Ok cool. Today when I drove it to the trans was still geeking out so I’m thinking of taking it out. If I gets bad enough I’m going to do that Mack :)
  11. MackAttack

    Excessive Cranking/Transmission Issue

    Alright awesome I’m going to do this tomorrow morning as today I just bought the fuel pump tester. Anything else you recommend to do ? Mack :)
  12. MackAttack

    Excessive Cranking/Transmission Issue

    No i never have. It would also make sense as sometimes, it won’t even crank it’ll start so fast after I did the 3 restarts of it not starting. Would it make it act like this too?
  13. MackAttack

    Excessive Cranking/Transmission Issue

    Ahh ok. I’m testing the fuel pressure right now. Thank you guys so much for helping me with all this. The truck has so much value to me and everyone is telling me to sell it but I would never haha. I’ll get right back to you guys after I get the results from the pressure test :) Mack
  14. MackAttack

    Excessive Cranking/Transmission Issue

    Alright I got into my truck, put the key in, turned it to the “On” position for 10 seconds, for 8 intervals on and off so 80 seconds of time for the fuel pump to prime. Turned it to the “run” position and same thing. Cranked like crazy, barely started, shook the truck, and died. I didn’t even...
  15. MackAttack

    Excessive Cranking/Transmission Issue

    Alright ordered a pressure tester and I am picking it up today. Let me go try the turning key on and off trick. I have tried this a couple times, but only turned the key about twice. Let me try and update you
  16. MackAttack

    Excessive Cranking/Transmission Issue

    as in modifications to the engine, there is nothing. I just replaced the water pump, thermostat, thermostat housing, radiator, all fluids, coolant temp sensor (which I have to replace again since it is freaking out on me). If you mean aftermarket, everything is about the same except for the...
  17. MackAttack

    Excessive Cranking/Transmission Issue

    About the tranny, how hard would that be to fix? I know transmissions are no joke to disassemble lol. I believe I have a 6L80 since that’s what came standard with these guys. I have a few friends that own shops, but I doubt any of them can do such complex things like transmissions
  18. MackAttack

    Excessive Cranking/Transmission Issue

    Alright awesome I’ll grab that puppy. I’m a Atv mechanic hobbiest so I’m sure I can use it for my off roaders as well
  19. MackAttack

    Excessive Cranking/Transmission Issue

    That was something Chevy told me a while back, but they wanted 350$ just to look at it, and god knows how much to fix it. The fuel pump issue started maybe 2 months ago. The transmission acting out was about around the same time, if not maybe a month older? When I first bought the truck from my...
  20. MackAttack

    Excessive Cranking/Transmission Issue

    Alright awesome OMW to auto parts shop right now. Which brand do you recommend?
  21. MackAttack

    Excessive Cranking/Transmission Issue

    Hey guys, Mack again with more problems with his truck haha I have a 2009 Chevy Suburban with 164,500 miles, and I’m having a couple of issues. Issue one I am having is with her cold starting. Every morning when I start her, she cranks like crazy for Atleast 8+ seconds, starts a tiny bit, then...
  22. MackAttack

    Engine Overheating

    I am feeling parts of the engine, and they are not hot just warm like normal operation. When i squeeze the upper radiator hose, it is stiff/warm as if the thermostat opened. If I don’t unplug the battery, I have to drive up to 20+ Miles for it to go up to about 180, then drops to zero and says...
  23. MackAttack

    Engine Overheating

    i am having 2 issues. On a cold start, the truck cranks like crazy, barely starts, and dies again, i have to rinse and repeat 2 times for the truck to start lol. The second problem i am having is that every time i come to a stop, i hear a Clunk from a little go the front of under me, and it...
  24. MackAttack

    Engine Overheating

    Alright awesome ordered a new one and it is coming :) Sorry for the long wait, i am having a new issue with the truck xD. I am sending pictures right now of my pride and joy
  25. MackAttack

    Engine Overheating

    in the box for the coolant temp sensor, I only received the sensor itself and had connected the original wires. Should I buy new wiring?

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