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97 lincoln missfire when warm. Especially going uphill. Rund fine until engine warm about ten minutes from starting. Changed all coils.

Have tried seafoam in gas. 30 psi fuel rail pressure. No codes. Wont throw a code while driving. No codes stored.

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  • Cars & Trucks Master
  • 5,371 Answers

Sounds like fuel pressure is too low-either a weak , old pump, or you need to change the fuel filter-most likely, the pump, though. Check the fuel pressure specification for your car, most mpfi systems require 40-50 lbs. of pressure.

Posted on May 05, 2013

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Posted on Jan 02, 2017

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GM Elec
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SOURCE: 2002 blazer 4 wheel drive hard to start

If the pressure is slow to rise, you should consider changing the fuel filter if it has not been done in the past 30,000 miles.
Next, disconnect a spark plug and check for spark while engine is cranking. Use a spark tester or old spark plug grounded to the engine block.
Let me know.
Regards,

Posted on Mar 23, 2009

  • 3 Answers

SOURCE: will start then dies

On the regals they have a ceramic resistor on the passanger side under the fender. It heats up and over time it tends to brake and the wire inside tends to rust away. The fuel pumps run in 2 different speeds. Had the same problem. Dealer only part yet the car would run and you would think it was the fuel pump. Turn the key it kicks on then start and dies out. Ceramic on the pass side would need replaced. It is white about 2-3 inches long or so held on with 2 bolts i do believe. Ill find a bulliten i found online to help me diagnos the problem. :) hopefully this helps someone out instead of spendin $$$ that ya cant afford with the recession eh?

Posted on Apr 01, 2009

  • 245 Answers

SOURCE: low fuel rail pressure

who did a conversion on this truck???? the duramax is a common rail engine and can not handle wvo or sve. it will destroy your entire fuel system in no time on this truck. if you want to do a vo conversion you need to get a diesel with an inline injection pump or one of the older powerstrokes. i would suggest you quit trying to run wvo through this truck if you do not want to do a lot of very expensive damage

Posted on Apr 29, 2009

  • 14 Answers

SOURCE: Fuel pressure intermittently drops causing sputter and die.

check for 12v constant at your fuel pump if you are not getting that replace your relay.
if you are getting 12 volts at your fuel pump the fuel pump is possible to run tuel it gets warm then shut down to a lower rpm I would then replace the fuel pump

Posted on Oct 10, 2009

  • 105 Answers

SOURCE: engine stalls at idle after engine has warmed up.

not near enough fuel pump pressure,should be 45 lbs

Posted on Jan 31, 2010

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