1999 Chevy Blazer stalling

Tiny
DERKERGEN2000
  • MEMBER
  • 1999 CHEVROLET BLAZER
Engine Mechanical problem
1999 Chevy Blazer 6 cyl Four Wheel Drive Automatic 128xxx miles

bought car needed a trans. But would idle. Drove to trans shop and it overheated. And it would spit and sputter and sometimes pop in mid range. Got it home same problems. Found evidance water pump and a heater hose leak. Replaced all hoses and water pump. For milage and since I had it apart I decided to check the timing chain and it had some slop so I replaced it.
also replaced belt, plugs, wires, cap and button. Got it all back together and still had mid range issues but now it would stall after a few minutes og idling and would not start till hours later. It would try to but wouldn't. Then I notice more water leaking and found it leaking at the intake. Took it apart and replaced upper and lower intake gaskets and fuel pressure reg. Since it is in the upper intake. Now no longer have mid range issues but still stalls have replaced tps, tested ignition mod, fuel pressure is within specs, replaced pvc, vaccume lines, thermostat, temp sensor, fuel filter. Per advice of auto parts store I unplugged o2sensors and it wasn't running as rich but still stalled. Right before it stalls it sounds as if it starts drawing more air and it tries to keep itself running but to no avail. Not sure what to do next dont know if it is flooding itself out which I dont think so cause I pulled the plugs and there was no gas in them they looked wet but could not tell if it was gas or oil. Or could the cpi malfuctioning and how do you test it?
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Sunday, November 15th, 2009 AT 1:03 AM

4 Replies

Tiny
MERLIN2021
  • EXPERT
Any engine codes? I can tell you if the fuel pressure isnt about 66psi, poppet has a hard time opening, new fuel pump will solve problem, you say pressure is in spec, what spec did you go by? PSI=what?
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Sunday, November 15th, 2009 AT 11:10 AM
Tiny
DERKERGEN2000
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According to an online motor man, I have through alldatadiy. Com it is the same man. Used by mech. With tech updates recalls specs. And anything else but trouble shooting. Anyway it says with key on and engine off with pump on it should be between 60 & 66 psi im at 64 with key on pump off im at 59 psi with engine idle its at 58 psi. A 5 min bleed off reading 58 psi. Also today when I went out I disconnected the cat. To see if it might be clogged and it wouldnt even start it would hit now and then. Hooked up spark tool and it would only light up when it would hit but not consistantly with every crank like it should be. Got a new coil same problem took coil back. The auto parts store said they could not test the cam sensor or coil but could test the crank sensor there must be a way to test things without paying someone $80 an hour or me buying everything it might be. Not savey with a volt meter other than contin. Test
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Sunday, November 15th, 2009 AT 9:47 PM
Tiny
DERKERGEN2000
  • MEMBER
According to an online motor man, I have through alldatadiy. Com it is the same man. Used by mech. With tech updates recalls specs. And anything else but trouble shooting. Anyway it says with key on and engine off with pump on it should be between 60 & 66 psi im at 64 with key on pump off im at 59 psi with engine idle its at 58 psi. A 5 min bleed off reading 58 psi. Also today when I went out I disconnected the cat. To see if it might be clogged and it wouldnt even start it would hit now and then. Hooked up spark tool and it would only light up when it would hit but not consistantly with every crank like it should be. Got a new coil same problem took coil back. The auto parts store said they could not test the cam sensor or coil but could test the crank sensor there must be a way to test things without paying someone $80 an hour or me buying everything it might be. Not savey with a volt meter other than contin. Test[/quote:9560a2467f]also there are no trouble codes yet.
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Sunday, November 15th, 2009 AT 10:13 PM
Tiny
MERLIN2021
  • EXPERT
If the battery power is good going in to the coil, but none out, the rotor and cap needs re checking. Check grounds as well.
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Monday, November 16th, 2009 AT 4:51 PM

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