turning down the pump

[RTRAM]

I recently had my bump rebuilt and asked the shop to turn up the pump and timing a little bit. Unfortunately, I just got a notice that my truck smokes excessively and I may get a ticket and fined. I don't need a $$$$ fine,#@$%!



I am asking, how do I turn down the fuel? I know there is a lot of discussion about the fuel screw, but does anyone have a picture/diagram of where its at on a 93 CTD? Also, if I turn down the fuel, do I need to do anything else?

I think the shop advanced the timing, also.



When your going down the road at speed, there not much smoke, but starting out, there is a cloud and it has to go.

 

[cerberusiam]

Go to the FAQ forum here,

https://www.turbodieselregister.com/forums/1st-generation-ram-forum-faq/, and read the stickies at the top of the page about the pump. Look for the section on the fuel pin and how it controls low boost fuel. You may be able to just turn the pin a bit and clear up the smoke.

 

[CToney]

On the timing put your finger between the afc and the intake manifold. Wide way stock narrow way advanced. Turn the fuel screw counter clockwise a 1/2 turn at a time should help. Black smoke is $ out your tailpipe. A small puff on acceleration is all I like to see. 5 or 6 mm wrench on fuel screw and 13 mm jam nut I believe. Good luck.

 

[phillips5]

you can control the smoke with your foot also. Push an the pedal plesently till the boost spools up then mash it down.

 

[DBraunig]

Here is a link to Fritz'z site. lots of info on the ve pump and how to adjust the pump.





Turning up the pre 94 Ram diesel injector pump



It's good reading and has some tuning tips if smoke is excessive at start up or under load.



Hope this helps,



Dave

 

[PToombs]

Try backing out the starwheel under the AFC diaphragm. This will make it need more boost before it dumps fuel. I would do this before I turned the fuel screw back out.

Leave the timing advanced, it make less smoke that way.

 

[RTRAM]

Thanks everyone. It took longer to put my tools away than to actually do the fix. I backed smoke screw out two turns and that got rid of most of the black smoke. There is a fingers worth of space between the AFC and intake manifold.



Thanks again to everyone for your quick responses

 

[MMeier]

Damn smoke cops!!!#@$%!