1800-2000rpm constant idle
This is a discussion on 1800-2000rpm constant idle within the General Help forums, part of the LSx Technical Help Section category; Just curious, what is the weather like in KY right now? Here in AZ, it's fairly cold in the mornings ...
12-09-2013, 08:18 AM #21
Just curious, what is the weather like in KY right now? Here in AZ, it's fairly cold in the mornings (mid 30s) and when I start it up, the idle goes straight to about 1400 and settles into 1000 over the course of a few minutes (as indicated by the tach... the CKP reports 200 rpm fewer than what the tach shows).
If you are able to isolate the problem and it turns out to be the throttle body, let me know. I have a completely stock one that I'm not using.Lid, Throttle Body, LS6 Intake, Stage 1 Heads, Mild Cam, Magnaflow Cat-Back, LS7 Clutch, SFCs, STB, Panhard Bar, Strano Springs, Strano Sway Bars, LCAs, Konis (F), Bilstiens (R), MGW Shifter
12-09-2013, 11:58 AM #22
- Join Date
- May 2013
- Nashville, TN
Black / White
- '00 T/A M6/'15 Hemi Truck
this really sounds like a vacuum leak so your tune shouldn't matter because it wont help with this situation...do you hear any whistling noises when you are under throttle or any sucking sounds that are out of the norm? These motors have a hand full of spots that are notorious for having vacuum leaks.
My last vacuum leak was right here...New gasket solved the problem. Cost like $2 and fixed my idle issue...all I had to do was press down on it and wiggle it a little and the idle would start changing. It would be worth unbolting this inlet and reseating the gasket to eliminate this from the equation...takes like 2 minutes.
Im also sure this was already asked "I didnt read every post" but have you cleaned the MAF...? I saw somewhere that it was descreened...
Last edited by theorangeguy; 12-09-2013 at 12:02 PM.
12-09-2013, 02:11 PM #23
12-09-2013, 02:15 PM #24
It's in the 30's, has been for about a week. It doesn't matter how long I drive it the idle never comes down until it starts loading up where it's so rich and it's killing the plugs then it will try to die. Hey man I really appreciate that if that turns out to be the problem I will let you know. Thanks a lot.
12-09-2013, 02:17 PM #25
12-09-2013, 03:48 PM #26
Sounds like you really need access to HPtuners, drive and log that thing and see what's really going on. I question the tune itself as well because you are getting all those transmission codes. If it were tuned at all, those trans codes should have been taken care of the first time around with a manual trans base file to start with.
12-10-2013, 02:22 AM #27
- Join Date
- Feb 2009
- Mansfield, PA
Black & Blue
- '02 WS.6 / '07 Suburban
No way I would swap our car over to a carb setup -- the cost of the parts, mods to the fuel system, and the question of hood clearance all negate that. That's a whole lot of money and work to fix an idle issue. Too bad you didn't live closer to PA -- we'd have that thing figured out in a hurry. For around $550 or so, you can pick up HP Tuners Pro. If you are a GM fanatic like most of us, it is a great tool to have.
12-10-2013, 03:35 AM #28
I was going to say the same thing. Switching over to a carb would cost you much more than a good dyno tune would so it's really not a cost effective option.
By the time you buy the intake, the MSD controller, and a good HP carb you'll be in it for $1500. Then all the little stuff like the fuel system and hood clearance that Jeff mentioned (people seem to forget to take that into consideration) You'll need to run fuel lines, a good regulator, etc...and these 4th gens suck for hood clearance not to mention half the engine sits under the cowl.
I'm all for a carb swap in a retro application, but on a car like this that was designed and born with this setup, I'd stick it out, find and fix the problem, and enjoy it.
12-10-2013, 06:54 AM #29
- Join Date
- Feb 2009
- Ugy Lower Corner of AL
Navy Blue Metallic
- 98 T/A w/a little mods...
I'd do like Jeff suggest, borrow a TB from someone to rule it out. Otherwise it's time to check the tuning. It might be worth it just to talk with Frost and see what he thinks. He has one of the best mail order tunes out there. (cost $150) You fill out a worksheet, mail the ECM and he can tune it based on what you tell him. Get it back in less then a week in 95% of the time.
Last edited by SMWS6TA; 12-10-2013 at 06:57 AM.
12-10-2013, 08:25 PM #30
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By Jager686 in forum General HelpReplies: 22Last Post: 04-08-2011, 03:44 PM
Question: vibration up to 1800 rpmBy JayTA98 in forum General HelpReplies: 6Last Post: 02-14-2011, 05:16 AM
By darkwingduck in forum Kill StoriesReplies: 16Last Post: 03-01-2010, 04:16 PM
By z28krazy in forum Internal EngineReplies: 3Last Post: 02-15-2007, 03:07 PM
By telimator in forum Vehicles For Sale / TradeReplies: 1Last Post: 08-08-2005, 09:56 PM