Discussion:
New fuel system and still problems

This truck has a new injector pump on it and the injectors have been tested but still you have to hold the glow plug button to get it to start. When it starts it runs rough and smokes bad !!!! any sugestions ?
  • Posted 16 Jul 2013 04:42
  • By dale_w
  • joined 23 Jun'09 - 48 messages
  • Missouri, United States
Showing items 1 - 5 of 5 results.
Dale W;
Have valve adjustments been checked, is the pump's number one been spill tested for injection timing, what diesel engine are you dealing with? A Nissan engine is always preheated before it's to be turned over. What is the cranking speed of the engine and do we have a load on it while it's cranking (HYD). A previous post asked about the exhaust smoke's color. Has the engine's head been worked on and what other repairs were dome on the power unit just before this issue started? I've seen a few strange reasons for a diesel not starting, and the one of the strangest one was a gas crank used in place of a diesel crank. The first step to take now is to determine what the cylinder combustion pressure readings are vs what they should be.
  • Posted 17 Jul 2013 12:29
  • By MEngr
  • joined 15 Jan'11 - 247 messages
  • Missouri, United States
What colour is the exhaust smoke, is it black or blue/white would you say the running is erratic,

Some possible areas to check defective stop unit,
Restriction on induction system
Restriction in fuel pipe is it a banjo fitting onto the fuel filter feed pipe dirt can collect at this point.
Sticking valves , broken springs incorrect valve tip clearance
Defective injectors incorrect pump timing
Poor compression.
Hope there's some ideas for you to check out

Regards Titus
  • Posted 17 Jul 2013 03:58
  • By Titus
  • joined 6 Jul'10 - 185 messages
  • North Yorkshire, United Kingdom
did you bleed out the injection pump after reinstalling it?
then bleed the injectors?

any air in the system will make the engine run badly and smoke
  • Posted 16 Jul 2013 22:42
  • By swoop223
  • joined 23 Mar'12 - 3,691 messages
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
it was just kinda hard to start before the fuel system was gone through but now it barely runs
  • Posted 16 Jul 2013 05:11
  • By dale_w
  • joined 23 Jun'09 - 48 messages
  • Missouri, United States
How about a bad piston/rings ?
  • Posted 16 Jul 2013 05:01
  • By mrfixit
  • joined 11 Dec'08 - 1,434 messages
  • New York, United States

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