Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Another Volvo hard start scenario

  #1  
Old 02-08-2018, 08:50 PM
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Default Another Volvo hard start scenario

So Iíve been lurking in the shadows for a while trying to use the forum to help me figure out whatís going on with my car but Iím stumped.

I just got my 96 850 turbo back on the road and now itís having problems starting. It will crank no problem but takes a few trys to finally get it to turn over. Sometimes it can take a few minutes to start. Once itís running, it runs like a champ. Turn it off and it takes forever to start again.

This is a list of things if changed/ checked:

no cel, no codes
compression ok
fuel pressure ok
batt ok
new coolant temp sensor
cam position sensor
crank sensor
idle air control valve
new fuel pump relay
new fuel pump
rebuilt injectors
fuel pressure regulator
fuel injector relay
different ecm


and Iím sure Iím forgetting to mention something...

I have no idea where tho go from here. Any help would be greatly appreciated
 
  #2  
Old 02-08-2018, 09:16 PM
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Cranking is the point at which the air flow would read the lowest. Vacuum leaks would make more of an error. That might be one possibility. it's a long way from the MAF to the throttle on a turbo. Lots of plumbing.
 
  #3  
Old 02-09-2018, 01:38 AM
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Make sure all the check valves from the tank forward are working.
 
  #4  
Old 02-09-2018, 08:53 AM
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Originally Posted by TnBob View Post
Make sure all the check valves from the tank forward are working.

so I heard that the earlier 850s had inline check valves but the later ones were built into the fuel pump. How many other check valves are there?
 
  #5  
Old 02-09-2018, 12:47 PM
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You could pinch off the return line temporarily to see if it's the regulator or check valve (s), number I dont know
 
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