Erratic Idle

[jlwelding]

Eng has 3ook on it and just changed the injectors, they were real bad. Eng sounded fine but no HP slow spool up and low EGT. Now it has good hp and all but at idle it is sorta erratic. Its not a miss. Tach has a little bounce to it, I think I read somewhere cam sensor need replace? No codes with the key but the 1693 comes up but nothing else.

[Dieselfuture]

I'd have to blame it on the new injectors if it was idling fine before. That are you might of bump some wires make sure everything is plugged in.

Edit. Maybe you have a high pressure leak somewhere one of injectors not firing. Crack em one at a time and see which one doesn't make a difference

Edited March 1, 2018 by Dieselfuture

[jlwelding]

 Injectors set for a few years with only 600 miles on them. I suppose they could be bad. These are DDP's 50hp what would you suggest for a top of the line injector?

[Mopar1973Man]

Do your valve lash. 

 

I had similar issues when I installed new DAP +75HP SAC's Injectors and had it more serve where the idle would lope and surge. At the end, it would even stall on hot days. After doing a valve lash adjustment it cured the majority of the issue. 

[Dieselfuture]

If you're looking at decent affordable injectors with Bosch bodies I'd probably go with DAP. They have quite a few choices, some are afraid of vco but I heard good things about them. I got sac right now but they are only 75hp I think if you go bigger sac gets to be more dirty. Someone else will know more on injectors.

[Mopar1973Man]

Nothing wrong VCO injectors being that what all stock and RV275 injectors are. 

 

 I know @jlbayes will chime in with his knowledge. 

 

I'm also running DAP +75HP injectors (7 x 0.0085) VCO. Not much issues the Quadzilla cleans them right up rather well. I know there is a handful of guys playing with much larger injectors and playing with pop pressure changes attempting to make a cleaner running injector. 

Edited March 1, 2018 by Mopar1973Man

[jlwelding]

2 hours ago, Mopar1973Man said:

Do your valve lash. 

 

I had similar issues when I installed new DAP +75HP SAC's Injectors and had it more serve where the idle would lope and surge. At the end, it would even stall on hot days. After doing a valve lash adjustment it cured the majority of the issue. 

Is 8 and 18 still a good setting on valves?

 

[jlbayes]

Yes on the valve lash.

 

The vco vs. sac is marketing hype bs. Do not fall for it.