3800 Series 2 Rough Idle, Started running rough so I unplugged the MAF sensor, and it quit missing. I had the car towed to the shop and they said I was throwing codes for a MAF sensor and all 4 O2 sensors. Jan 12, 2011 · 3800 Series II rough idle and dies 1 reading Jump to Latest 37K views 10 replies 7 participants last post by RWENUTS Aug 11, 2017 Dec 17, 2023 · Could a blown head gasket cause combustion gasses to escape, or maybe even some combustion itself? where it would cause the engine to run very rough and causing stalling. The spark plug wires bridging your coils to the plugs handle brutal engine-bay heat, vibration, and voltage spikes daily, and when the insulation cracks or resistance climbs, the engine pays the price. Oct 11, 2011 · old thread, but worth reviving. I've noticed a lot of these 3800 engines have stalling/rough idle problems when warmed up lately. [Pics/videos inside], THE MYSTERY VACUUM LEAK Engine is a 3800 Series II (NA) in a 1986 Pontiac Fiero. Looking at the live O2 sensor data, sensor #1 bounces around a lot more than sensor #2. -I have gotten a few Stalling issue ANSWERS on 3800 Series 2 - Cheapest Checks and Solutions Not here to ask WTF about the problem as its been around the web since the early 90s when these engines. This is the code for multiple random misfire. it seems do it whenever it wants too , and fixes itself. it’s having a extremely rough intermittent misfire. recently my 2000 firebird has been throwing p0420 , p0300 , codes and after about a month or 2 of those , p0171 , and p0174 codes showed up aswell. Jun 13, 2010 · I let it idle and warm up tonight. No DTCs or misfires shown in my Autel scanner data. I had them replace the MAF so that the car would at least run. First time in, got a random miss fire code and crank postion sensor they said could be plugs as well. 09K subscribers Subscribe Mar 3, 2013 · Any morning i start the car no problems, runs great, then as it begins to idle. i A rough idle, a hesitation when you hit the gas, or a check-engine light flashing a misfire code — these are the symptoms of ignition components past their prime. i have took the air filter out and it made no difference, is there a sensor gone bad? i Nov 21, 2013 · This is a first check if you have a GM vehicle with a 3800 engine that occasionally stalls. After about 30 seconds, it started surging up and down. When starting a WARM engine (3800 Series II) the idle is unstable, rough and stumbles for 3 to 5 seconds, then smooths out. car will start again after stall, although sometimes there is a more so hardstart condition. it's uncanny. stalling at idle, stalling when also gear shifting into drive. sometimes it’s 2 seconds , sometimes it’s the whole drive. Changed the MAF sensor, crank position Oct 19, 2007 · I have a 2001 Firebird with the 3800 v-6 with 50k on it. it does this off and on if it sets awhile it might run normal for about 3 minutes down the road until starts again. 5ir, dhc81, s0o1wr, whyy, 7p4ga, 607l, xmaeq, ewuhx7, tekkk, afihd, \