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Old 11-20-2011, 06:03 PM   #1
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Unhappy running issues 2000 yukon denali

i have a 2000 yukon denali that stalled on my wife in the drive way , i tried to start and it would not. i tried starter fluid and got it to start and run. but after a few minutes it begans to run rough and stall or when i turn the wheels. i have replaced , plugs, wires, cap ,rotor, fuel filter, checked fuel pump it is working and has good pressure. alternator and starter new. when i changed cap and rotor , distributor was loose i chacked timing with light and tightened . security system is disengaged. im running out of ideas.

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also after i get it running and it stalls it is hard to resatart and runs very rough
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Old 11-21-2011, 07:33 AM   #2
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its a vortec 350 right? what was the pressure exactly they are real sensitive to having the right pressure. there should be over 60 key on engine off and it should stay for a while. and it shouldnt go down that much when running. also was the the dist loose enough that the timing might have changed?
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Old 11-21-2011, 01:29 PM   #3
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I'd also take a look at the fuel pump. High failure item on GM RWD SUVs, and they go intermittently.
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Old 11-21-2011, 01:32 PM   #4
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retesting fuel pressure today, will inform after i get results. its weird it will run fine till it warms up or till you turn the wheel
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Old 11-21-2011, 04:52 PM   #5
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ok retested fuel pressure, results are with ignition on it pushes 55/57 psi and when cranking it pushes 65/70 psi
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Old 11-21-2011, 05:22 PM   #6
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i believe thats too low. theres a few things that can cause a drop, you already did the filter. a leak, fuel pressure reg could be bad. or your pump could be going out. you could also have corrosion starting in the pump connector but its a pain to get to so if you drop the tank you might as well replace the pump/ sending unit

how many miles you have?
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Old 11-21-2011, 05:49 PM   #7
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126,000 miles fuel pump replaced 3 years ago. now the truck will not start at all even with starter fluid. it started yesterday and ran for 20 mins or so now today nothing
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Old 11-21-2011, 08:20 PM   #8
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ok tested spark on first plug wire and coil both getting spark, truck started today for about a minute but ran very rough , after it stalled it would not start back
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Old 11-22-2011, 07:31 AM   #9
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the cheaper pumps ive heard last less time then that. and like i said the connector could be bad. are there any check engine codes?
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Old 11-22-2011, 03:24 PM   #10
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no check engine light is not on
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