questions about 2004 5.3L Silverado Z71 engine.

Asked by Specialist92FS Jul 16, 2018 at 11:42 PM about the 2004 Chevrolet Silverado 1500 Z71 Extended Cab 4WD

Question type: Maintenance & Repair

I've read a few forum conversations on here and got some good advice and
information on how to fix my issues. After looking at my engine and trying to
apply the new learned knowledge, I have learned my engine is not the same as
I previously thought and after researching engine diagrams of 5.3L. To get to
the point, my truck is having running issues. It'll start (after acting like the
voltage is low and resetting the radio clock), but after getting on the road to
work 3 miles away (5 min drive) the truck bogs down and wants to stall out
unless I feather the throttle to keep the revs up. This all started with this
Indiana heat 90+ degrees, I thought maybe it's starting to overheat, maybe
there's air bubbles in the engine. I drained the system and replaced the
thermostat and refilled the system. Still acting up. Then I came here and read
information about the same problems and *John Saffrahn* gave great advice
and knowledge. went back to my truck and found out I DO NOT have the Fuel
Pressure Regulator on the left side on my engine. So this is my problem, I need
help with the technical identification on my engine as well as help diagnosing
the problem. please help guys! I will appreciate any advice.

2 Answers
350

Noadd answered 6 years ago

Does the engin run rough when you first start it? Because if it's running at too low of idle it will acked like it's running with low voltage. But the rateio shouldn't have to be rest unless your losing all voltage. I work a an auto place take your truck to Auto zone they will hook a computer to your truck and read the codes. Have them check your altinator they will test it all for free. It might be your mass air flow sensor. That reads the outside temp to let your computer know how much fuel and air to send to your engin. There not cheap thow Abt 150 bucks. When Auto zone tests your altinator make sure you turn your blower on to the AC or heat all the way so your putting a load on the alternator some times if your not putting a load on it it will test good when it's really bad. I hope this helps.

Mark helpful

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