Post by: 84burban on February 19, 2017, 03:28:50 pm
I am experiencing issues with my electric choke on my 1984 3/4 ton 4x4 suburban. I have never seen a choke light light up on my dash in any instance. There is no voltage at the choke regardless of key position. When I look at the fuse panel there is a spot labeled for the choke at the top left of the fuse block but there is no fuse in there and I cannot see any brass contacts inside the spot for said fuse... I have tried to locate the oil pressure sending unit. It was not by the oil filter. I did locate something behind the distributor but it does not look like the pictures others have posted. Oil pressure does register on the dash. I have read all the posts I could find involving the stock electric choke. I appologize if I am missing anything that was obvious. It does appear that the last four inches of the choke wire coming out of the harness has been repaired. It disappears from there into the wire loom. Attached is a picture of what I think is the sending unit for the oil pressure. It does look a bit different from the posted pictures i have seen though. Thank you for your patience and time! 84Burban
Post by: VileZambonie on February 19, 2017, 05:20:00 pm
Post by: 84burban on February 20, 2017, 09:30:13 am
There is zero voltage at the choke when the engine is running. sorry for not mentioning that first off. There is a sharpie cap inserted in the choke to keep it open heh heh... :o thank you for responding!
Post by: 84burban on February 20, 2017, 11:27:19 am
You need to check for voltage with the engine running. Start by doing that.Good Monday, thank you for responding. There is zero voltage at the choke with the engine running.
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Post by: VileZambonie on February 20, 2017, 12:00:52 pm
Post by: 84burban on February 20, 2017, 02:55:38 pm
Take a better look at the fuse block. There should definitely be a choke fuse.Thank you, I did put a fuse in the choke slot. No choke light or voltage at the choke still.
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Post by: VileZambonie on February 20, 2017, 03:05:27 pm
Verify the oil pressure switch is connected by the distributor.
Post by: 84burban on February 20, 2017, 03:50:53 pm
Are you sure you are checking the correct fuse and for good measure just test all of your fuses with a test light.
Verify the oil pressure switch is connected by the distributor.
Yes the top left of the fuse block has a place and a arrow pointing to the choke slot but there are no brass contacts to accommodate the fuse. There are other spots where there are labeled slots but no contacts. I did test the other fuses (wipers etc...)with a tester and they lit up. There is something on the drivers side of the distributor that looks similar to a fuel filter. Just the shape. It has one wire coming out of the top that is connected. The bottom has a fitting that appears to be attached to the manifold. There is oil pressure registering on the dash gauge. It seems to be working correctly as it ramps up upon starting.(https://uploads.tapatalk-cdn.com/20170220/2ddc663fa46ae6e187444a81a409e826.jpg)(https://uploads.tapatalk-cdn.com/20170220/6fb86fd5b7b032da85ab7079445a20b1.jpg)
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Post by: 84burban on February 20, 2017, 03:54:14 pm
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Post by: 84burban on February 20, 2017, 04:04:27 pm
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Post by: bd on February 20, 2017, 04:56:05 pm
Post by: VileZambonie on February 20, 2017, 05:13:25 pm
Post by: 84burban on February 20, 2017, 06:38:01 pm
Are you the original owner? Has this truck been repowered at some point in its life? Post a clear pic of the VECI label located on the radiator support.I am not the original owner. I bought it two years ago. It has been my daily driver since then. (https://uploads.tapatalk-cdn.com/20170221/3ad3ace4ae7c8f4ff140a88dc214ba8d.jpg)I am not sure if it has ever had a engine swap.(https://uploads.tapatalk-cdn.com/20170221/b48089960c80f5d140acbe44fa461de2.jpg) i suppose it is possible that it was swapped out because of the aftermarket headers.
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Post by: 84burban on February 20, 2017, 06:39:02 pm
You have gauges or idiot lights?Stock gauges in dash cluster that register op as it ramps up
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Post by: VileZambonie on February 20, 2017, 06:43:39 pm
Post by: 84burban on February 20, 2017, 06:46:32 pm
Your truck may be equipped with a choke relay instead of an oil pressure switch then. When the engine is running it supplies current to the choke heater through the relay. One of my old trucks was setup this way too. I don't see that depicted in the diagrams I have but I'm fairly certain mine was also an 84 equipped as such. I'll look around and see what I can findThank you very much.
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Post by: VileZambonie on February 20, 2017, 07:01:22 pm
Post by: VileZambonie on February 20, 2017, 07:32:28 pm
Post by: 84burban on February 20, 2017, 07:40:30 pm
Sorry, I do not have a diagram showing the choke relay wiring. Maybe someone else on here has one for your application depicting this setup. You can create your own choke circuit if necessary as well.There we go. Thank you for your time. I will locate the relay and see if that is the problem. I will also do a search to see if anyone has done the choke bypass surgery
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Post by: VileZambonie on February 20, 2017, 07:49:54 pm
Post by: 84burban on February 20, 2017, 08:00:16 pm
(https://uploads.tapatalk-cdn.com/20170221/6b6a25fde300af1443935e7f56b07c67.jpg)i found this relay dangling above the fuse panel just above the buzzer attached to the fuse block. Is that diagram specific to my application? I could not find that exactly.Sorry, I do not have a diagram showing the choke relay wiring. Maybe someone else on here has one for your application depicting this setup. You can create your own choke circuit if necessary as well.There we go. Thank you for your time. I will locate the relay and see if that is the problem. I will also do a search to see if anyone has done the choke bypass surgery
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Post by: 84burban on February 20, 2017, 08:20:32 pm
I did a search on autozone with the relay part number and it came back as a fast idle relay.(https://uploads.tapatalk-cdn.com/20170221/6b6a25fde300af1443935e7f56b07c67.jpg)i found this relay dangling above the fuse panel just above the buzzer attached to the fuse block. Is that diagram specific to my application? I could not find that exactly.Sorry, I do not have a diagram showing the choke relay wiring. Maybe someone else on here has one for your application depicting this setup. You can create your own choke circuit if necessary as well.There we go. Thank you for your time. I will locate the relay and see if that is the problem. I will also do a search to see if anyone has done the choke bypass surgery
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Post by: VileZambonie on February 21, 2017, 12:30:16 pm
PS134 oil pressure switch
1053 pig tail
and diagram
Post by: 84burban on February 21, 2017, 12:41:39 pm
I would install an oil pressure switch if you cannot locate the pigtail in the harness just make a standalone circuit. These are AutoZone Part #'sThank you! I'm on it. Talk soon.
PS134 oil pressure switch
1053 pig tail
and diagram
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