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    87 350 TBI running lean

    It looks like the IAC is trying to keep the RPMs at 100 whether is it in drive or park. When I come to a stop in drive, the rpms stay at 1000. When it put it in park, they shoot way up because the load is off and then slowly come back down to 1000. In drive the IAC is around 75 and it goes down...
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    87 350 TBI running lean

    I have a 1987 350 tbi truck that runs a little weird. When I put it back in park after driving it for a while, it shoots up to around 1600 rpm and slowly comes back down. Also just changed all the plugs and they were white. Driving around monitoring the sensors shows that the BLM and INT are...
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    1987 350 TBI code 42

    Where did you get this manual that you sent me a screenshot of?
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    1987 350 TBI code 42

    Snooped around and found out that my EST wire was cut and poorly reconnected at some point. Soldered it back together and no more code.
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    1987 350 TBI code 42

    I have owned my 87 chevy for over 2 years and I have had a code 42 for most of that time. From what I know this means that the ecm is not talking to the spark module on the distributor? I have just run my truck with this code forever because it has always run fine. Now I am having issues and I...
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    K10 Misfiring

    I have an 87 k10 that has started misfiring recently. When I first turn it on and I am driving it around it runs fine. Once it warms up it starts to misfire at throttle under load. When it's in neutral it doesn't do it. It is especially bad when I am going up hills and it gets worse as the truck...
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    1987 4WD Slip Yoke Leaking

    1987 Chevy 4WD 700r4. My slip yoke is leaking from the center plug thing. From what I have read the 4wd models have the spline missing instead of having that seal and hole in the middle of the yoke (you can see mine has no weep hole). Is the best option to just replace the whole slip yoke?
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    350 TBI high idle

    The last high idling drive was the first time it had started since having the battery unplugged for a few hours. I started it a couple times and took it for a cruise at speed. I guess the computer has learned the idle now because it runs better than it ever has.
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    350 TBI high idle

    I havent had it up to 40 yet so would going faster for a bit help?
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    350 TBI high idle

    I tried that. It worked for a second until the IAC unwound itself and sped things up again
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    350 TBI high idle

    No IAC has always been really high. You can see on the pictures I posted how high it is. Its at least above 60 all the time. TPS is good.
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    350 TBI high idle

    Here are some pictures of the sensors when it is warmed up. One is stopped in drive and the other is in park after driving around a bit
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    350 TBI high idle

    Just went for a drive and it warmed up and switched to closed loop. With the IAC unplugged it idles like it should. Once it was warmed up it would idle at 1000 rpm in drive completely stopped. When I shifted it into park, it started idling at 1450 rpm and slowly went back down
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    350 TBI high idle

    Will a plastic bag work too?
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    350 TBI high idle

    Above is a picture of the sensor readings. As far as I can tell, they all look fine. Also, I found a ripped vacuum elbow going to the charcoal canister and I plugged that temporarily and nothing changed (ill buy another elbow and fix this but I figured plugging the hole for a minute wasn't a...
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    350 TBI high idle

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    350 TBI high idle

    Also my IAC count start low but then I starts opening up and causing the high idle
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    350 TBI high idle

    I have a 1987 K10 with a TBI 350. I discovered a mistake in the wiring and fixed it and adjusted the idle properly. Now, when I start the truck up it idles at around 1000 rpm and when I switch it into drive and back to park it starts to idle at 1700 rpm. What do I do?
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    1987 K10 Idle issues

    I have always had issues starting my 1987 k10. I would always be really rich and idle low and be almost impossible to start in the cold. Then, once warmed up, it would idle way too high. it had codes 15 (low coolant temp), 32 (barometer error) and 42 (?). I finally bought a obd reader and hooked...
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    '87 TBI Rough Cold Start

    Hello! I have an 87 with a 350 TBI that really does not like to start in the mornings when it is cold. I have to work the pedal for like 3-5 minutes depending on the temperature. When it is warm it runs fine. What could be wrong? The tube that comes from the exhaust manifold to heat the air is...
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    ECM Interchangeability

    Hello! I need an ECM for an '87 350 TBI. I have access to 90'-93' ECMs that are in 350 TBI c1500s. Would these work without modification?
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    Flooding issue

    Ill go to a junkyard and get a ton of parts in a day or so. For now, I want to see if it could be the EGR valve stuck (I don't think it would be because it ran fine w/o MAP but hey). Should I be able to move the valve by sticking a screwdriver into where I have the picture and pushing it up and...
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    Flooding issue

    Just disconnected the map sensor and it ran and idled with both injectors plugged in. It was super rich though. What is the next step? replace the sensor and vac line?
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    Flooding issue

    I don't think that it is the injectors. This first happened when I had a battery die in the truck. It randomly started working again after a few days with a new battery. Recently, I unplugged that battery and I am having this issue again. This makes me think it is an electrical issue. For clear...
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    Flooding issue

    Hello Guys! I have a 350 TBI that injects way to much fuel to the point that the truck will not even start when I crank it. When I unplug the injectors, the truck runs fine until there is no fuel in the manifold. I read that this could be a coolant temp sensor. I replaced that and it did not...

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