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#238 of 607 '01 Rough Idle & Stalling
Jan 22, 2007 (7:47 pm)
I have a 2001 Chevy Suburban 2500, 2WD w/ 6.0L engine. We purchased it from a Chevy dealership back in 2002. It was a GM buy-back, for the same reasons it's now having.
Having a problem with stalling. It usually happens after backing out of parking areas when vehical returns to idle while shifting from reverse to drive. It then become difficult to restart. Also during this issue if vehical doesn't stall it starts exibiting erratic idle. The vehical also seems to idle low 550rpm down to 400 and lower on occasion.
I have attempted to locate the idle air valve but it doesn't seem to have one in the location in the manual (on throttle body by altinator). I can only find what I believe is the Throttle position sensor in that location.
Vehical doesn't do this all the time but nore times than not and seems to be more often during cool/cold weather.
Any help or idea would be gratly appreciated.
#239 of 607 Re: newly acquired tahoe already causing problems [70ss454_man]
Jan 22, 2007 (8:59 pm)
I would suggest replacing your fuel filter. Its a quick easy item, that is probably due to be done, and it could certainly explain your problem.
#240 of 607 Re: newly acquired tahoe already causing problems [catam]
Jan 23, 2007 (7:40 am)
I seem to have a similar problem. I have a 99 Tahoe, with 130k miles. Recently, in under 30 degree weather, it would not start. Had spark and gas. Seemed as though engine was flooded. Poured gas down the throat, and it would not start that day, but the following day it started. However, the following morning it again did not start. I had the fuel pump, and fuel filter changed. It started fine for a few days. However, now it did not start again. Had mechanic friend make house call. Hooked it up and found no abnormal readings. Changed 4 spark plugs on driver side. Started great. The old plugs (not really old, changed in July) were wet. What is causing the flooding? One mechanic speculated the spider-something-or-another. Another speculated that all I need is Heat in the gas tank.
#241 of 607 Re: newly acquired tahoe already causing problems [pljwtahoe]
Jan 23, 2007 (8:01 am)
Problem could be on the fuel side, or on the spark side.
If the fuel mixture is not ignitable because it is too rich or lean (assuming a perfect ignition system), then the plugs will foul with excess gasoline and be flooded.
If the mixture was correct (assuming a perfect fuel system), but the ignition had a problem in not firing the plugs with enough voltage and/or at the right time.....then again the engine would be flooded.
You need to suspect and check both sides of the equation.....takes both to Tango.
#242 of 607 Re: newly acquired tahoe already causing problems [kiawah]
Jan 23, 2007 (3:04 pm)
Does a vehicle requiring the gas pedal to be put to the floor in order to start warrent worries of ignition problems?
#243 of 607 Re: 2000 SUBURBAN ENGINE KEEPS SHUTTING OFF AS I DRIVE [alkemist]
Jan 27, 2007 (4:56 pm)
Could you provide, or direct me, to instructions on how to replace the crankshaft sensor? I have an '02 1500 suburban 5.3 L.
#244 of 607 Re: Suburban shuts down [kdmiller]
Jan 27, 2007 (5:02 pm)
I am having a similar problem with stalling as well. Is there a post or thread on instructions for replacing the crankshaft sensor?
#245 of 607 Re: 2000 SUBURBAN ENGINE KEEPS SHUTTING OFF AS I DRIVE [jml430]
Jan 28, 2007 (2:52 am)
disconnect neg. battery cable. Raise vehicle support with jackstands. Remove skid plate if equipped, remove starter. Disconnect electrical connector. Remove sensor mounting bolt. Reverse steps to reinstall.
#246 of 607 Re: 04 suburban cabin filter [red97tj]
Jan 28, 2007 (2:57 am)
It is located under the dash. To access it you have to remove 1 screw That is holding the cover in place it is l-shaped. It is just left the the wiring.
#247 of 607 Re: 2000 SUBURBAN ENGINE KEEPS SHUTTING OFF AS I DRIVE [ahoron]
by MrShift@Edmunds HOST
Jan 28, 2007 (8:06 am)
thanks for posting that!