CTD in a Chevy 1500 (blasphemy?!?)

[phillips5]

The cloud of black smoke then clears up could be considered nomal if the afc screw is turned down. Mine is bottomed out I love to take off in third gear You cant see behind me. White smooke you have covered about every thing. Are you shure the valves are set right. Was all the right markes lined up when the pump was installed if it was ever off. How does it start ( I wish it would get cold down there so you could do a cold start test).

 

[CRivero]

It starts up immediately. No problems there. You're right, it doesn't get cold enough down here for a cold start test.



I spoke with a mechanic yesterday from Central Florida and he agreed with you guys that the 8. 3 injector tips don't do much and upgrading to the 7100 was not necessary. He recommended a place in Orlando that will rebuild the VE pump for less than $350 (it's got over 130K miles on it, so why not) and suggested installing a tighter torque converter to put more load on the motor. He also mentioned a KDA valve on the injection pump that must be connected correctly to help maintain the correct timing.



He seemed pretty knowledgable and received good recs from a TDR member. I may just take a short trip and see what he can do.

 

[RGT]

on our engines that valve he mentioned is the KSB, it increases the internal pump pressure when the engine is cold(below 50?) that in turn gives you a little more advance until your engine starts to warm up, it is located on the front fender side of the pump you might try putting power to it and see if that makes a difference when just starting up.....

 

[CRivero]

Is it supposed to have power when it's hot and not when it's cold? The engine starts up fine (but it's always hot in South Florida). I'm wondering if not having power to the valve keeps the timing in an advanced state.

 

[HoleshotHolset]

CRivero: Have you checked your fuel pressure/volume yet?



This problem smells of a fuel delivery issue... air leak, etc.



Matt

 

[MidwestMotorman]

A holley blue fuel pump runs 35+ psi pressure and 110 gallons per hour. You had better check your oil dipstick. You may have blown your little lift pump on the block and are filling your crankcase with diesel. Also check your fuel output as I mentioned above.

I don't know if the return lines can handle that return flow volume.

Anyone know if gassers and diesels use the same filtration on the intake sock in the fuel tank? Some GMs have the fuel return dumping onto the intake sock. You may have definitely have a fuel flow problem with the thicker diesel.

Have you drained some fuel out of your fuel filter and looked at it?

 

[MidwestMotorman]

More things to consider... how did this engine run BEFORE it went into this truck? If it ran fine before it went in here, then it is something to do with the chevy chassis or something to do with the mods you did.

Did you turn the full fuel screw the CORRECT way? Did you ckeck your air filter as I recommended in my first post? Is that K&N filter over oiled or dirty? Are you running this through the stock CHEVY air filter system??? If you are, then that is definitely a contributing factor to your performance troubles. Dirty fuel filter?



The solution to this problem has got to be simple, and the answer must already have been suggested. Remember the three important combustion engine factors... Air, Fuel, and Ignition. If you already have checked the 1) air source and piping, 2) fuel condition, pressure factors and hardware, and 3) the timing, then it HAS to work. There is something that was not checked, assumed good, or was overlooked. You have all of the answers in front of you and all of the wisdom you need right here.