You can usually clean an IAC...just use electronic cleaner not degreaser or brake cleaner. The one on the Lightning truck needs to be done every 10k or so. So far the Isuzu has stayed pretty clean.
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You can usually clean an IAC...just use electronic cleaner not degreaser or brake cleaner. The one on the Lightning truck needs to be done every 10k or so. So far the Isuzu has stayed pretty clean.
Where exactly is the Idle Control Valve??Quote:
Originally Posted by JGeorge264
Thanks - Bart
(from previous thread to quote VX Extreme)
Since I have a S/C on my engine and the throttle body is mounted upside down on the S/C'd engines, the idle control valve should be on the upper left hand side of the throttle body on a stock engine. This would be when you are looking at the engine with the hood open looking toward the windshield. It is a dark gray/black domed sensor that has an electrical plug going into it. It has 2 screws (I believe they were torx screws) holding it into the throttle body. I would recommend that you remove the throttle body and clean it and not just the idle control valve. The port that the idle control valve closes against was pretty dirt with oil buildup on mine as was the idle control valve itself. I don't think that you can clean that port well without removing the throttle body. You want to also clean around the ports where the butterfly valve in the throttle body closes. I would recommend removing the throttle body. It only take about 30 - 45 minutes to remove, clean and reinstall.
Fuel Pressure Regulator replacement how to:
http://www.vehicross.info/forums/showthread.php?t=12021
Dino did a great how to on this mod!
Moncha, is there any way to get this listed on the How To's? I did not see it there, under engine how to's. Thanks.
Moncha,
I think I've already created a pdf for this. Is the easiest way to get it to the right place for me to post is to the download & you move it over to the how2?
Tom
Funny you say this because this has been my "quick fix" for this until I replace some guts. Unfortunately, it did not work for me this weekend. On start, the engine instantly revved and idled at 2500. AFter about 3-5 seconds, it would drop to about 1500 and rev right back up to 2500 again. Rinse and repeat a few times. Typical rev on startup, but it has never revved so high. I pumped the accel once up to about 3k, which usually kicks it in to acting normal, but strangely enough, it stayed at 3k. I hopped out real fast and look under the hood to see if the throttle cable was sticking, but the throttle body and cable were fine. I gave the TB a rev by hand and it still continued at 3k. Hated to do it, but I let it stay there for a few more revs before it finally gave in and stalled. I didn't want to hot cut the ignition. I turned it back on about 10 minutes later and it was fine. Turned right over too.Quote:
Originally Posted by Chopper
Needless to say, she stayed in the garage all weekend. I don't need to wear this problem thicker than it already is. I have enough parts on my "to do" list already. :(
I did the FPR swap and Idle Control Valve cleaning last night, and the VX now idles and drives A LOT more smooth! Probably as smooth as I have ever experienced. Pics will follow tomorrow probably. I hate to admit this but everything went smoothly except that at first I was turning the back bolt the wrong way because it was facing the firewall and I didn't stop to think about which way to turn it, but I got it off after I realized I was trying to tighten it at first and then I just replaced both of those allen head bolts with some 12mm spares bolts from other VX projects and it looks good as new, and more importantly runs better than ever, literally!
Oh and the Idle Control Valve was pretty black in there, but it is spotless now ;)
on post and pics about the fix:(
Dang! I am so sorry! The only photos I have right now are there:Quote:
Originally Posted by circmand
http://www.vehicross.info/gallery/da...3-6-09_054.jpg
http://www.vehicross.info/gallery/da...3-6-09_057.jpg
http://www.vehicross.info/gallery/da...3-6-09_062.jpg
Which probably don't help too much, but those are the part numbers and GM reference numbers that LDub wanted and a pic of the part. What other pictures did you want?
circmand,
I'm not sure which pics you're waiting on, but the link that LittleBeast listed above of Dino's fuel pressure regulator replacement how-to is excellent. I used Dino's step by step when I replaced my regulator and everything went off without a hitch.
and in a later post on 12/8 she mentioned she would post pictures. I assumed she meant additional pictures since it was after the post. I was not meaning to be critical I just was reminding her just in case like me a lot of times she just forgot.
Sorry, I wasn't being critical because information is what this site is all about. I just wasn't sure if you where waiting on pressure regulator pictures or pictures of the idle control valve.
Oh, and LittleBeast is a dude. One rad dude I might add.:p
to littlebeast
HAHAHA classic. My VX is nicknamed LittleBeast it does not refer to me, lol :)