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  1. 6.5L Diesel Engine
    I have a vin F 1999 K2500 all bone stock no upgrades to it. Just the other day it started this loud knocking noise (sounds like a rock being shaken in a tin can). This noise isn’t easily heard at idle from the top of the engine bay but you can hear it clear underneath. When I’m driving it you...
  2. 6.5L Diesel Engine
    I have a 1999 vin F k2500 lots of new parts on this truck. Drove about 50 miles when the truck started sputtering and then stalled. PMD has been remounted to front bumper, has new lift pump, new injection pump. Truck stalled and wouldn’t restart had to get it towed home so haven’t checked it for...
  3. 6.5L Diesel Engine
    I have recently bought a 1994 6.5td and was wondering how I should be using the after market lift pump switch the previous owner installed, i was told to flick the switch on every time I start the truck is this the correct way to use such switch? And should I plan on reverting back to the stock...
  4. 6.5L Diesel Engine
    Ill try and keep it short as most will be covered in checklist but basically have a 3500hd that would surge at highway speeds when throttle was released all the way and smoked excessively under load or heavy acceleration. Other than that had no problems aside from an oil leak from oil pan and...
  5. 6.5L Diesel Engine
    I have 1999 vin F k2500 that clunks on what seems to be the passenger side of the truck. It clunks over small bumps and large, even small cracks occasionally. I’ve replaced most of the front end suspension. Parts replaced: shocks, upper control arm, ball joints, inner and outer tie rods...
  6. 6.5L Diesel Engine
    So my dad and I have been working on our 1994 K2500 6.5. He was talking about how some guys will do a you give them your 5.9 and they give you a working 5.9. Does anyone know if anyone does the same with the 6.5s in the chevys?
  7. 6.5L Diesel Engine
    I have a 1996 6.5td motor that Im going to be putting into a 1995 I read up that the obd1 are way easier to tune and upgrade then a obd2 I am wondering how hard it would be to covert my 96 to a obd1 ecm so I can tune t easier and how hard would it be and what I all need to do to it so it will...
  8. 6.5L Diesel Engine
    My 6.5 started idling high and rough with touchy throttle and a bit of surging was running fine shut it off and started it 5 minuets later and it started doing this, I tried a different pmd a new coolant temp sensor, I’m stumped and I know it can’t be a bad injection pump as they don’t go bad in...
  9. 6.5L Diesel Engine
    Good morning. I have a 93 GMC K3500 with the 6.5. I've had my transmission replaced twice already because of an electrical part they said was causing the transmissions to go bad. It was this second time I was told that and they replaced it with a newer part that bypasses the older one. This one...
  10. 6.5L Diesel Engine
    Greetings guys!! Paul here. I have a 1995 GMC 3500HD 6.5 Diesel with a Flat deck and a Man Lift (Boom) on it. I have had this truck for 11 years. It has 130,000 Kilometers (78,000) miles on it. It has been maintained well. I am hoping some one can help me. It started cranking slowly. Starter...
  11. 6.5L Diesel Engine
    Hey guys new to the forum and to diesels but I’m looking at a 94 Chevy k1500 with the 6.5L turbo diesel for 1500 bucks. It’s got 185k miles and the starters not working. Went with a buddy last night to check the truck out and tried jumping the starter and it started grinding. Did a little...
  12. 6.5L Diesel Engine
    Okay so I have a 98' 6.5. We have already put a new injection pump in a little while after we bought it back in say 2015 or so. I was driving back in October after just gettin it out after 2 years of sitting, Drove fine etc. Was going up a hill and it died like it was getting no fuel so did some...
  13. 6.5L Diesel Engine
    I got it all put back togather, I figured it was going to start after all that work but now it seems that it just won't start put batterys on trickle charge everything looKS good there. I have dual battery set up single alt. My starter looks good inside a Lil bit dirty but nothing as bad as it...
  14. Buying or Selling a Truck Questions
    Hello all! I need some advice. I have a 1998 Chevy K3500 that I am looking to sell with a custom flat bed. The thing was over all in good condition but I never got it inspected and needed new door handles.. that’s about it. But last year it died on me while driving. My fuel gauge didn’t work so...
    6.5
  15. 6.5L Diesel Engine
    Hey all, 1. I got a 98 K2500 HD 4x4. I have a low coolant light on my dash. I’m guessing there may be a sensor in the reservoir itself, because the coolant is not low. Can’t find the sensor or part number to replace it. 2. My turbo is starting to not sound to great. Didn’t know if there is a...
  16. 6.5L Diesel Engine
    I am currently having issues with my 1994 C2500 2wd 5 speed. I just bought this truck and before purchase the guy before me had just had a diesel shop install a new injection pump and glow plugs. I drove this truck 250 miles until I had issues with it. It started fine I drove it and shut it off...
  17. 6.5L Diesel Engine
    Ok. I have a 1996 k2500 suburban with 6.5. I have been reading every forum post I can find on this site and others trying to figure my problem. my initial problem after buying the truck is I was having a surging/erratic throttle pedal response. it started fine even at 0 degrees Fahrenheit...
  18. 6.5L Diesel Engine
    My 1998 6.5 smokes lots of black when it accelerate, I have a spring wastegate makes 10psi boost, plugged old wg vacuum line, new injectors, has no shaft play, spools good, getting real frustrated with this
  19. 6.5L Diesel Engine
    I need some help before I light my truck on fire. I have been fighting with the timing for a while now. From what I can tell, I have the injection pump physically turned to where I want it. 3.6 degrees average Actual Injection Timing. I have a code 88 that won't go away when cleared with...
  20. 6.5L Diesel Engine
    My 6.5 idles really rough between 1100-1200rpm and it will slowly accelerat on its own when I put it in drive, like I can drive to the store without touching the gas, when you punch it Boggs out but then at higher rpms it’s good, I’ve been told it could be air in my fuel or a bad injection pump...
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