This is a tutorial on how to swap out an IAC valve in your 1991 Chevy C1500 pickup. This motor is the 5.7 V8. I am not an expert, I’m a semi professional amateur learning as I go. I hope I can help!
@@romansandoval5399 You can still try and disconnect the battery. Connect the 2 battery connectors together for a couple of minutes in order to reboot the car computer. Reconnect the battery. If this do not work it is possible that the sensor got defective due to installing it without disconnecting the battery.
You have to reboot the car computer otherwise the car will not detect the new sensor. Normally this is done with the car scanner but if you don't have a scanner this is the only option.
My 92 s10 gets 10 mpg and runs super rich, lots of power and runs good besides the above mentioned, I’ve changed everything except egr and o2 sensor which I did check and they’re working
Thank you so much this helped a problem with my truck but I still have anouther problem it idles fine when In park and I can even rev the enigne but when I put in in drive or reverse if I don’t step on the gas it stalls But if I get it to 10 mph I can drive just fine but as soon as I slow down to stop or turn it stalls do you know what it could be? I have the same truck as you it’s a 93
@@theblack_6.033 all new distributor would help had a buddy with a problem truck turned on but once in gear would turn off sometimes and it was only if he didn’t have his foot on the gas it fixed his problem
My idle on my truck after taking it to a old mechanics shop was somewhere areound 600 i think where before it would idle around 1500 with a bad throttle gasket
If the control valve is blocked would this lead to a weak idle? My truck has been running way too low when stoped but seems to be okay when driving? Any ideas?
Replacing all of the easy to access sensors fixed my low idle in my 5.0 TBI. MAP sensor seemed to be the one that did it and it's relatively cheap and super easy. Control valve and MAP sensor.
there is a wire harness disconnect for the a/c flapper door,, no need to remove any panels just reach under that area where noise is coming from and disconect it
So I've replaced my map sensor, rebuilt the throttle body, replaced the IAC that you replaced in this cid, also did the injectors and fuel filter, new pcv. The vacuum lines are good and the motor has been rebuilt. I honestly don't know why it wants to still stall or have a decent idle until a stop light. It runs great but it doesn't. Didn't know if anyone had any thoughts
I put a new one in the 87 Chevy g20 but it didn’t run correctly, 5.7 liter didn’t seem like it wanted to run correctly. Put old one back in it was ok. Am I doing something wrong? How to reset?
My 94 always idled around 800 to 1000. Recently on start ups it been idling real ruff, like the plugs or wires or something electrical is wrong. Isn't throwing codes yet, so i'm thinking it's some little dollar part. Just don't know what part it is yet.
My 94 C1500 had random rpm surges when idling. Replaced fuel filter, a vaccum line, and ran Seafoam through the gas tank in case it was the injectors. Still happens. Was going to clean the MAF until I realized....theres no MAF🤦♂️. Anyone think that cleaning or replacing the IAC will fix it? Its not a huge issue, just annoying that half the time I stop at a red light, someone thinks I'm trying to race
Sounds like a base gasket vacuum leak. Replace the gasket. Common problem. Can also be a vacuum leak elsewhere, but that sounds like a base gasket issue.
I have a issue while driving, after cruising for awhile it’ll get stuck at 150k rpm and I have to put it in Neutral an rev it a couple times before it goes back down.
When I bought my truck 5 years ago started changing sensors aic,tb,map, temperature control,knock I'm finding the AIC about 2 years needs cleaned or changed ilove my k1500 1995 350 tbi I hate the sensors but the engine is kick ass also Didi differential fluid front and rear does anyone have problems with the brake safety switch what a pain in the ars
Just unplug battery for 5 mins no need to do anything but install plug in and first start won’t work at all turn it off then back on and it should work that’s what happened to me
Put mine in today. Idle went through the roof. Did all correct resets and still was super high idle. Put old one back in. Normal idle Any ideas? I’m guess it’s a fault valve. The spring was low on the new and the old was up.
Well, truck is still running great. I replaced the AC blend door actuator and am 95% done getting the new LMC dash in and installed. Just waiting on a few small things.
Maybe fuel delivery /pressure . Fuel pump may be weak, more likely a clogged fuel filter. Start there, then fuel pressure regulator , clogged injectors. Maybe a stuck open EGR valve, or even a coolant temp sensor .
Mine would die when I turn the steering wheel when I’m parked or do a turn to park/go into my driveway and I hear it idle down than normally and it shuts off mid turn and sometimes at a stop sign or light when I do a complete stop. Doesn’t shut off all the time, just sometimes. Still looking for a fix. When I leave the wheel straight without touching it, it idles where it’s supposed to be at.
My fuel sending unit was bad. I unscrewed the o2 sensor near the cat and it tricked the computer to send more fuel to the carb. Got me home and to the shop. Was pretty loud though
