Stalling and low power - Page 2 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #11  
Old 09-28-2019, 01:02 AM
eracet eracet is offline
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2002 Chevy TrailBlazer LTZ
Dark Green Metallic 4.2L I6 4X4
Join Date: Aug 2016
Location: South Dakota
Posts: 18
The AC delco MU1837 is 170$
Fuel pressure tester that you showed for an example is 40$
That is where I am getting 1/4 cost.

I will check the connection and go from there.

Thanks for the continuing help.
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  #12  
Old 09-30-2019, 12:31 AM
eracet eracet is offline
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2002 Chevy TrailBlazer LTZ
Dark Green Metallic 4.2L I6 4X4
Join Date: Aug 2016
Location: South Dakota
Posts: 18
I have ordered a fuel pressure testing kit, that should work to test out pressure.
If not I will look at others.
Reseated camshaft position sensor. Driving it tommorow and will test.
I have developed a leak of some kind that may be from oil filter. Going to scope it tommorow. (Frustration).
When I test pressure will post results.
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  #13  
Old 10-02-2019, 02:58 PM
gary1987 gary1987 is offline
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Join Date: Jul 2019
Posts: 1
Cam Shaft position sensor

I have been battling the P0340 code for several months. Had stalling when going from highway speed to low speed. Changed cam shaft positioning sensor. Problem went away but still got the code. I cleaned the connectors. I reseated the sensor. I check the voltage in the wires. I bought a new OEM sensor. Still got P0340 code. Did a lot of research. I was also experiencing an intermittent loss of all display gauges. The suggestion was to change the ignition switch to fix the dash problem. My research also found that many computer signals go through the ignition switch. Well, today I changed the ignition switch. Took a total of 5 minutes. Eureka! The P0340 code is fixed.
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  #14  
Old 10-02-2019, 06:53 PM
eracet eracet is offline
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2002 Chevy TrailBlazer LTZ
Dark Green Metallic 4.2L I6 4X4
Join Date: Aug 2016
Location: South Dakota
Posts: 18
It was fixed after replacing it back with the old one,
Was a troubleshooting step of the real problem with the stalling and poor performance.

Thanks for the advice with the code. I will definitely use that advice if I run into the issue again.

The oil leak was from a filter that was not tight (I hope) still testing.

Currently I have all parts to replace everything, just waiting on testing the fuel pressure and then I will post results.
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  #15  
Old 10-06-2019, 08:36 PM
eracet eracet is offline
New Member
 
2002 Chevy TrailBlazer LTZ
Dark Green Metallic 4.2L I6 4X4
Join Date: Aug 2016
Location: South Dakota
Posts: 18
Recieved fuel pressure tester, worked on some body rust, dropped oil again, here is what I have..

Oil filter had a small indentation in the o-ring that didn't provide a proper seal.
So replaced oil filter and oil re-used. It was all good

Fuel Pressure test,

When starting it went to 54 (normal) then dropped to 47 when running.

I have a few pressure regulator, thinking that may be it, unless someone else has a suggestion.
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