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Post by Sasquatch on May 24, 2021 15:33:05 GMT -5
Question: I have been driving a 2003 silverado with 145,000 miles on it. It has had a fairly easy life and runs well. It has a vortec 4.3 six, automatic transmission. The only things that have happened recently:
The check engine light would come on and flash when I gave it a lot of gas. ( sometimes) I looked it up and it said it indicates a misfire. Other than the light flashing I noticed no changes. I took it in and of course it wouldn't do it. No codes came up either.
Also, three times I have hopped in, ( over a two week period?) started the truck ( cold ) put it in gear, and rolled down the driveway about three seconds and.... *poof,* dead. No sputtering or warning, just dead like an EMP hit. Each time it has started back up and ran flawlessly as usual.
Any ideas? Thanks.
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Post by treetop on May 24, 2021 19:02:19 GMT -5
Does it have key fob one of our work vans did that it was the anti theft on the key I really don’t understand it but somehow the key fob killed the motor it didn’t link up with itself so the van thought it was being stolen and shut it self off
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Post by Sasquatch on May 24, 2021 20:21:16 GMT -5
Does it have key fob one of our work vans did that it was the anti theft on the key I really don’t understand it but somehow the key fob killed the motor it didn’t link up with itself so the van thought it was being stolen and shut it self off Good thought but one thing I like is that this plain jane model has a simple key. |
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Post by duff on May 24, 2021 21:07:52 GMT -5
Without codes it may be tough.
If it is common issue someone has the fix online. Google exact details and follow the bread crumbs. If lucky a you tube search will be made too
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Post by 36fan on May 24, 2021 21:12:04 GMT -5
The problem is the bow tie on the front🤣
I had a similar problem in my f150 and the idler air control valve needed cleaned. I don't know if it would be the same on a Chevy or not.
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Post by esshup on May 24, 2021 23:41:03 GMT -5
Can't help, but what about more background info. What maintenance has been done to it, when was the last tune up, when was the plug wires/plugs, etc. changed? I don't know if they have coil packs or a distributor.
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Post by featherduster on May 25, 2021 0:50:52 GMT -5
Quit guessing and take it to a mechanic have it put on a computer.
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Post by duff on May 25, 2021 4:03:32 GMT -5
Quit guessing and take it to a mechanic have it put on a computer. Probably good advice but what's the fun in that? |
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Post by coolbreeze on May 25, 2021 5:33:36 GMT -5
Nothing wrong with trying to save a buck or two.
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Post by Sasquatch on May 25, 2021 5:41:06 GMT -5
Quit guessing and take it to a mechanic have it put on a computer. Already did. No codes! |
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Post by Sasquatch on May 25, 2021 5:53:17 GMT -5
Can't help, but what about more background info. What maintenance has been done to it, when was the last tune up, when was the plug wires/plugs, etc. changed? I don't know if they have coil packs or a distributor. So far all I've done is oil changes, brake pads and and an air filter maintenance-wise. Not sure about the tune up, though I have asked the mechanics to check it out whenever it is in. I'm sure it's time. BTW, not related to this problem, but anyone that has this era of Chevy truck, check those brake lines. They are prone to rusting. Mine failed while driving through Columbus! |
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Post by duff on May 25, 2021 6:09:25 GMT -5
All break lines are prone to rusting. After replacing my lines on a 97 Civic I got to help my brother n law replace his on a Ford freaking ranger a few weeks later.
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Post by esshup on May 25, 2021 8:09:38 GMT -5
20+ winters in a road salt environment, that's to be expected.
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Post by sculver7 on May 25, 2021 10:04:17 GMT -5
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Post by greghopper on May 25, 2021 10:15:01 GMT -5
Harbor Freight sale code readers also! Personally I would be looking at a fuel pressure problem including a dirty fuel filter. |
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Post by deadeer on May 25, 2021 10:31:08 GMT -5
Harbor Freight sale code readers also! Personally I would be looking at a fuel pressure problem including a dirty fuel filter. Rural King as well on the code reader, $15. You have to research the code still, but google and YouTube are handy. I 2nd the fuel issue to look at. Most everything has a Schrader valve port to take a fuel psi reading. Only takes a min. Can tape the gauge to the windshield when driving to monitor if a driveability issue as well. Fuel pumps can get weak, they dont always just go out. Although not common. |
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Post by jman46151 on May 25, 2021 11:18:19 GMT -5
Harbor Freight sale code readers also! Personally I would be looking at a fuel pressure problem including a dirty fuel filter. I was going to say fuel or electrical. Maybe even a bad ground or connection causing fuel to not be delivered or ignited. But probably just dirty/bad gas/clogged filter/something similar. |
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Post by stevein on May 25, 2021 11:29:38 GMT -5
My 1987 Ford F150 had a high pressure fuel pump under the hood. I had occasional cutouts but no warning lights.
When it failed I had nothing. It had pumps in both tanks that fed a pump in the back that fed the HP pump.
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Post by swindianapaul on May 25, 2021 17:18:21 GMT -5
My 2001 Suburban with the small 8 had same issue. Did it for a month, no codes when at mechanic's. then just quit and would not start at all. Mine was the fuel pump in my tank.
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Post by 36fan on May 25, 2021 21:34:35 GMT -5
When you turn the key to run, do you hear the girl pump prime? Is it loud or subtle?
No noise is no fuel pump. A loud prime is an indication the fuel pump is on its way out.
Does the fuel gauge work correctly? A non-functioning fuel gauge is also related to the fuel pump.
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