The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Significant Success, TBI Idle Hunting and Idle Miss

Mr Bear · 02-27-2018, 06:46 PM

Evening update. installed new MAP and new EGR solenoid. Did a hot restart from about 150+ degrees and let it idle up to full temp with the thermostat open.....no wander in the idle. Shut it down for 5 minutes just like pulling into the gas station for smokes and a coffee, hot restart from 200+ degrees and no wandering idle. Also noted on both restarts the engine rpm responds more rapidly, cycling off the fast idle and down to a smooth hot idle right quickly now, not the slow slow drop in rpm it usually exhibited before. 3 more days to work this week so that's 420 miles on test runs. should know if I nailed the wandering idle issue by then. i'll let you know.

maybe soon I can move on to a couple split flanges and snug up that pesky leaking PS side manifold doughnut......

02-27-2018, 06:46 PM	#6
Mr Bear Registered User Join Date: Sep 2014 Location: All Over Posts: 54	Re: Significant Success, TBI Idle Hunting and Idle Miss Evening update. installed new MAP and new EGR solenoid. Did a hot restart from about 150+ degrees and let it idle up to full temp with the thermostat open.....no wander in the idle. Shut it down for 5 minutes just like pulling into the gas station for smokes and a coffee, hot restart from 200+ degrees and no wandering idle. Also noted on both restarts the engine rpm responds more rapidly, cycling off the fast idle and down to a smooth hot idle right quickly now, not the slow slow drop in rpm it usually exhibited before. 3 more days to work this week so that's 420 miles on test runs. should know if I nailed the wandering idle issue by then. i'll let you know. maybe soon I can move on to a couple split flanges and snug up that pesky leaking PS side manifold doughnut...... __________________ No fancy sayings here.