Question about Chevrolet Silverado 1500
Tested diagnostics on OBD 1 checked for short to ground on circuit none found could there cause be another cause safety switch at transmission
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Posted on Jan 02, 2017
From Lusty Kid:
I know the economy is bad, but change all of the plugs. Check your PCV Valve hose, 150 rottens them out allowing air to be sucked in, thus all kinds of codes.
Depending on mileage. Dismount the EGR valve and clean passages. If you are really good dismount the throtle position sensor body and clean out passages with Choke Cleaner., dismount where the EGR valves connects to the engine, clean out passages. Also check the hose thats behind this mounting to ensure is not clogged. If clogged clean it out. If not replace it. Is about 1.5 ft. long, connects to the PCV Valve Hose.
When is the last time you change your harness. Can't remember??? Replace it. Good Luck
Posted on Dec 26, 2008
It looks like the wire circuit for the wiper motor is touching the car body when shaken so the only thing you can do is shake the wires and terminals yourself while engine is running then maybe you can pinpoint where the earthing is.
Posted on May 08, 2009
SOURCE: i have a 1988 jeep
To read Diagnostic Trouble Codes (DTC's), the test connector for the electronic engine control system must be used. The test connector is more commonly referred to as the Data Link Connector (DLC). On all Jeep models through 1990, the DLC is a 6-pin and a 15-pin connector located under the hood on the right side of the engine compartment. On 1991–93 models, the DLC is located under the hood on the left side of the engine compartment near the powertrain control module. On 1994–98 vehicles, the DLC is located in the passenger compartment, under the driver side dashboard.
Data Link Connector (DLC) location — Jeep models through 1990
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Posted on Jul 11, 2009
Engine 1 fuse powers the computer and some sensors. I had this same problem on a 98 chevy van 3500 and found the wire going to one of the oxygen sensors had shorted out on the heat shield. Inspect the wires going to all of the oxygen sensors. On this van one of the oxygen sensors on the driverside the wire was laying on the heat shield which eventually rubbed through the wire and shorted it out blowing the fuse. Your short could be on a different sensor but check all of the oxygen sensors because the wire runs so close to the sharp heat shield.
Posted on Aug 06, 2009
The ECM is very possible.I assume cylinder 4 injector is providing gas?The connection for cylinder 1 is probably a connector with pins correct?If you can bypass the ECM,that would get you closer if not give the answer.I would try using a wire straight from the battery to the injector electric somehow without damaging the wires.For years,if i had an extension cord which was old,I cut off the ends and save it just for troubleshooting occasions like this is a good example.If you do the bypass,try to hold the wire with something other than skin.I have leather gardening gloves,pliers.The gloves are better for steadiness and pliers are metal.It is not likely that it should melt but doing electrical work for so many years,an ounce of prevention is worth way way more than a pound of cure.If it did melt,it would stick and probably a couple weeks worth of pain.I would like to know how you make out.If you reply back to this post I will get an autolink to your post.Good luck! Greg
P.S.Was your error code from the car's own system and not a shop?I am trying to figure out what year that system started.
Posted on Sep 18, 2010
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