Service engine light
#1
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Location: EL PASO, TX
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Service engine light
Hey! I've been having several issues and have been going by what's on these forum to guide me. I don't do mechanic and don't know much but after reading these forums then going to a mechanic they look at me like I know what I'm talking about so first of all thanks to all your posts they do help!
Now, my service engine light came on. I went to Autozone & Oreillys and both gave me codes P0171 & P0174. Guys at shops recommended I use a fuel injector cleaner then run it 100 miles. So I did light still on. I also did the following before taking it to get the engine light problem looked at: 1.)tune up which I needed. 2.)Changed my oil. 3.) Checked for leaking or cracked valves.
***Other problems I noticed when the service engine light came on was that my RPM needle jumps up and down (even more when I turn the heater on, there's also a whistle noise off & on coming from my front passenger side, and truck acts as if I'm running out of gas (once in a while).
Now I took it to a mechanic and he did the diagnostic w/the "accurate" machine that's woth $3000 . Anyhow he got reading P0401 then told me it was my oxygen censors. Sooo he changed them. Truck feels smoother. But my RPM needle still jumps not as bad but it still jumps. Then when I turned into my street from leaving the shop my service engine light turns on again!!!
I got on this website and now it seems it could be a leaking valve like I assumed all along, ICV valve OR my EGR!!! Dam I'm really stressed over this. Can someone PLEASE help me!!!
Now, my service engine light came on. I went to Autozone & Oreillys and both gave me codes P0171 & P0174. Guys at shops recommended I use a fuel injector cleaner then run it 100 miles. So I did light still on. I also did the following before taking it to get the engine light problem looked at: 1.)tune up which I needed. 2.)Changed my oil. 3.) Checked for leaking or cracked valves.
***Other problems I noticed when the service engine light came on was that my RPM needle jumps up and down (even more when I turn the heater on, there's also a whistle noise off & on coming from my front passenger side, and truck acts as if I'm running out of gas (once in a while).
Now I took it to a mechanic and he did the diagnostic w/the "accurate" machine that's woth $3000 . Anyhow he got reading P0401 then told me it was my oxygen censors. Sooo he changed them. Truck feels smoother. But my RPM needle still jumps not as bad but it still jumps. Then when I turned into my street from leaving the shop my service engine light turns on again!!!
I got on this website and now it seems it could be a leaking valve like I assumed all along, ICV valve OR my EGR!!! Dam I'm really stressed over this. Can someone PLEASE help me!!!
#6
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Ok so when I picked up from mechanic he said it was not the idle control. He said it looks like it was a gasket that was torn up. So told me to take home and ride around. If engine light comes back on to go back to him. So like clock work after the 2nd start up the light came back on. Next day I cleanded the EGR which was very clogged. I was told to clean it by soaking in gasoline over night and it cleaned it. Put it back on next day. But engine light came back on after 2nd start up. So it's been nothing I've assumed. Now I want to know how I can find a valve leak? Any advice anyone please!
#7
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with unsteady rpm needle and a whistling sound i'ld look for a vaccum leak(intake, plenium, hoses,etc) if you still want to check for leaky valves you'll need a vaccum guage and a chart to tell you what the guage is saying....they use to have them in the haynes manuals long ago not sure now....heres a link for an internet one
http://www.classictruckshop.com/club...ts/vac/uum.htm
http://www.classictruckshop.com/club...ts/vac/uum.htm
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#8
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also take a can wd40 or whatever you feel good with( i use anything thats available....within reason) and spray around all gasket areas/joints and if there is a vacuum leak you'll know it quick.
#10
Senior Member
with unsteady rpm needle and a whistling sound i'ld look for a vaccum leak(intake, plenium, hoses,etc) if you still want to check for leaky valves you'll need a vaccum guage and a chart to tell you what the guage is saying....they use to have them in the haynes manuals long ago not sure now....heres a link for an internet one
http://www.classictruckshop.com/club...ts/vac/uum.htm
http://www.classictruckshop.com/club...ts/vac/uum.htm