1997 Z71 will not turn over
soulidefy15
01-28-2013, 07:59 PM
Hello everyone, thanks in advance for any help I get!
I have a 1997 Chevrolet Z71 4x4 truck. 350 engine.
This morning I went to start the vehicle and it cranks fine but doesnt turn over. It cranks at a normal speed and then every second or so struggles, and then cranks normally again. About 2 weeks ago I went to start it and the starter didnt engage, it just spun. I released, tried again and it started right up. It did that twice over about two weeks. I figured the starter had gotten too weak, so I replaced.... No help.
The truck has been running quite rough for a little while, and I was doing research to replace the valves and sensors that were recommended (EGR and Idle Air Valves), but the truck seems to have decided that I will do this maintenance now, whatever it is. By running rough, I mean, when it idles, it shakes some. Going down the highway, it runs fine and doesnt miss or anything like that. It is sluggish, but it is a 16 yr old truck with 230000 miles, so it just seemed somewhat normal.
I have checked for spark, and verified that. I can smell fuel when I crank, so I dont think its a fuel problem, although tomorrow I will see if it will fire off starter fluid to verify.
I have had the rotor go out before, but it seems when it did that it didnt stagger when I crank.
Any ideas? I have heard camshaft/crankshaft position sensors could be a solution, but would like to get some ideas before I troubleshoot with money.
Like I said, thanks in advance.
Josh-
I have a 1997 Chevrolet Z71 4x4 truck. 350 engine.
This morning I went to start the vehicle and it cranks fine but doesnt turn over. It cranks at a normal speed and then every second or so struggles, and then cranks normally again. About 2 weeks ago I went to start it and the starter didnt engage, it just spun. I released, tried again and it started right up. It did that twice over about two weeks. I figured the starter had gotten too weak, so I replaced.... No help.
The truck has been running quite rough for a little while, and I was doing research to replace the valves and sensors that were recommended (EGR and Idle Air Valves), but the truck seems to have decided that I will do this maintenance now, whatever it is. By running rough, I mean, when it idles, it shakes some. Going down the highway, it runs fine and doesnt miss or anything like that. It is sluggish, but it is a 16 yr old truck with 230000 miles, so it just seemed somewhat normal.
I have checked for spark, and verified that. I can smell fuel when I crank, so I dont think its a fuel problem, although tomorrow I will see if it will fire off starter fluid to verify.
I have had the rotor go out before, but it seems when it did that it didnt stagger when I crank.
Any ideas? I have heard camshaft/crankshaft position sensors could be a solution, but would like to get some ideas before I troubleshoot with money.
Like I said, thanks in advance.
Josh-
j cAT
01-29-2013, 08:28 AM
have the battery load tested and clean all battery wires and grounds.
at your mileage replace the distributor. these fail at this mileage or sooner.
measure the fuel pressure with a pressure gage. need 62-65 psi on cold start.
cps could be a problem also with loosing signal. check wires/connector. remove and clean sensor. make sure it is securely in the proper position.
when these fail many times the output is erratic.
at your mileage replace the distributor. these fail at this mileage or sooner.
measure the fuel pressure with a pressure gage. need 62-65 psi on cold start.
cps could be a problem also with loosing signal. check wires/connector. remove and clean sensor. make sure it is securely in the proper position.
when these fail many times the output is erratic.
soulidefy15
01-30-2013, 03:26 PM
how do i and what do i need to execute a pressure test?
j cAT
01-30-2013, 03:55 PM
how do i and what do i need to execute a pressure test?
get a manual also go to you tube for video on this test.
you will need a pressure gage auto zone should have it ask for info and how to hook up.
get a manual also go to you tube for video on this test.
you will need a pressure gage auto zone should have it ask for info and how to hook up.
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