Recent content by Falkasorus

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    Th400 electronic issue

    I took it out the this weekend and drove it when it started acting up I pulled the guage/idle fuse and it went away plug it in and it was back immediately. Crawled under it and unplugged the selenoid and problem gone... now I have to figure out if my ecm is messed up and telling it to fire or if...
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    87 tbi voltage spike

    It will do it at idle and while driving. Really notice it at idle. Put a new battery in it. The alternator plug looks new.
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    87 tbi voltage spike

    Have an 87 tbi and long and short been some weird electrical issues but lately my voltage will go from 13v to 16v stay pegged there and then fall back. When it falls back the truck seems to miss almost die and come back. Ideas. Bad alternator. Or maybe the rough idle isn't related just seems to...
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    Th400 electronic issue

    Checked that and replaced the modulator. Hopefully new TPS helps
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    Th400 electronic issue

    It's now throwing codes 21 22 tps high and low voltage any specific place to start have a new sensor coming?
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    TPS

    What could cause code 21 and 22
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    Th400 electronic issue

    If I understand right I have the one on the exterior of my trans and the internal one. They are fired by the pcm what tells the pcm when to fire? TPS sensor haven't found I diagram yet.
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    Th400 electronic issue

    Thanks
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    Th400 electronic issue

    Is there a way to Vin search what transmission came in it factory?
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    Th400 electronic issue

    I will crawl under it and check tonight. I'm also going to try and get it to do it and then pull the fuse and see if it goes away for sure. If it does then I'm even more confused hahaha. As far as I know and have read the single wire to the detent solenoid should be controlled off the pedal...
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    Th400 electronic issue

    Yea I just replaced the fluid and filter its a th400. I haven't found the schematic yet. But does the tps sensor tell the detent solenoid to operate? It's been frustrating. I remember the day it started and that was the day I plugged in the gauge/idle fuse.
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    Th400 electronic issue

    Idk if this helps. It's a TBI I appear to not have a kickdown switch and the only fuse I replaced before this started happening was the guage/idle fuse. My guess the reason it was pulled and a 3 cluster pack installed down below.
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    Th400 electronic issue

    I have an 87 c10 when I bought it the dash cluster wasn't working. After finding the plug to be shorted and installed a new fuse it all works.. my truck now shifts funny when driving through town and only periodically. I contacted the person I bought it from and they failed to mention that...
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    Th400 shifting.

    Dude much appreciated. Glad I joined and asked the question. I have a new vacuum modulator and will probably just get a governor. And check the kick down switch. Will post my updates thanks
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    Th400 shifting.

    Thanks for the information very helpful. Also it's not dropping from 3rd to 1st rather 2nd to 1st in and out at the 20-30 speed range. I will try all the things you say. But does my vaccum accumulator have any effect on that?
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