Engine light blinking. Motor stumbles. one cat is 198F bank 1 and the other is 501F Bank 2. and pressure is good. Possible ECM or O2 sensors? P0300 CHEVROLET Tech Notes The P0300 code means that a cylinders is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are a common caused of multi-cylinder misfiring. If no leak is found the next step is to replace the spark plugs.
03/08/2017 · Can someone please help with what I should check next, I have a 1998 Chevy K1500 5.7 Vortec with a misfire, P0300 code for 3 months. runs a little rough, while driving under normal conditions it sputters, hesitates, and also will backfire, under heavy acceleration no noticeable skip, no sputters, and does not hesitate or backfire. 09/06/2009 · 99 5.7L vortec misfires under load. This topic contains 10 replies, has 0 voices, and was last updated by Anonymous 15 years, 3 months ago. P0300 code. The regional GM rep stopped by while my mechanic friend and i were discussing the problem. He suggested this.
23/02/2014 · 5 7 vortec misfire has constant miss gives code P1441 twice every time I've done complete tune with crank and cam. I have a 98 chevy z71 5.7 350 vortec,. 05 kia amanti with diagnostics codes p0350,p0320,p0300,p0302,p0303,p0304,p0305,ipping at times.when it does skip & misfire the rpm gauge goes crazy.this problem is not consitant. 25/01/2014 · 5.7 vortec misfire, no power engine misfires, backfires through intake, while driving it sputters and will not gain - Chevrolet 1998 Suburban question. GM Code P0300: Random/Multiple Cylinder Misfire Detected. FIXD explains symptoms, causes, and severity of code P0300. See here for a step-by-step guide on how to diagnose and fix GM check engine light code P0300. 05/02/2018 · Dead miss or pop in my 5.7 vortec when full throttle passing. 1 Answer. That is a 97 Chevy Half Ton 2 wheel drive 5.7 Vortec I have replaced distributor cab rotary button plug wires plugs air filter coil b ut when I go to pass someone and put my foot to the floor it will. 07/01/2018 · So now I'm confused. Is it possible it's a valve adjustment issue? I'm trying to understand whether or not this engine Vortec 5.7 has adjustable valves or not. The engine doesn't make a ton of abnormal noise when running, but I would say it is ever so slightly noisier than other 3 Vortec 5.7s I've owned and about as noisy as the 4?.
16/12/2013 · I no longer have my 2002 black LTZ, I've got a 2002 Suburban 1500 4wd with the 5.3 Vortec. Anyone have any ideas on the following issue? Check engine light came on one afternoon. Started the vehicle, it seemed to be missing, very rough idle, but didn't stall. Scanned the codes, P0300 Random/Multiple cylinder misfire. P0300 CHEVROLET Tech Notes The P0300 code means that a cylinders is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are. 29/11/2010 · I have a 1999 GMC Yukon 5.7 Vortec. Recently it started to mis one day sitting at a stop light. Lucky for me I do have a scanner so I scanned for codes. Found 3 & 5 cylinders to have misfires. Replaced plugs & wires, misfire still present. Ran compression test.
22/11/2019 · My truck has a very ruff idle. engine light came on and its a P0300. I replaced the spark plugs, cables, cap and rotor. Checed the injectors and 7 and 8 did not make a difference when unpluged so i replaced them. it ran smooth for about 5 secs then back to the rought misfire. 05/01/2016 · 98z71 5.7 multiple misfire P0300 fouling 1 3 5 7 plugs with gas what causes ths - Saved searches Saved listings. Check for vacuum leaks, that is a Vortec engine, intakes are prone to leak, check the bolts, there are only 8 of them, torque to 15 to 20 ft.lbs. 03/11/2012 · I am very familiar with the 5.7 vortec that is in your truck. Very common to get missfires when the intake gasket is failing which is a real weak point in these engines. Here is what you do, pull all the hoses off both valve covers and plug them, like with ductape or if you have a few hands, hands. 19/10/2018 · Can someone please help with what I should check next, I have a 1998 Chevy K1500 5.7 Vortec with a misfire, P0300 code for 3 months. runs a. - Page 2. Can someone please help with what I should check next, I have a 1998 Chevy K1500 5.7 Vortec with a misfire.
|Still only throws the p0300 code and sometimes a flashing CEL only at idle Holding my hand on the exhaust you can definitely feel a missfire only when truck is warmed up I guess only thing now would be to do a compression test. Driving down the highway the truck seems to run fine. Only at Idle am I having these issues. FML.||22/04/2009 · i am having the same problem with my oo tahoe same motor started as a7 misfire then changed to multiple misfire. so after changing plugs, wires, distributer cap, rotor, coil, ignition control modual, I still cant figure it out, i did notice that the rubber rings on the intake were a little worn but not bad enough to leak. then today the.||20/06/2010 · I have a 1996 GMC K1500 5.7 Vortec 180,000K. My problem is it has a rough idle and it is hard to start. I have to let the pump run 30 sec before I start it. Off idle and during acceleration it runs fine. When I drive the truck the engine light will go on and off. I scanned it and came up with P0300, P0172, P0175 ans P0141 codes.|
11/06/2016 · 98 chevy pick up came in for a bad misfire. Customer had already changed the spark plugs and wires but still had a bad miss. We put the engine on the scope and saw that it had a secondary ignition problem. A common problem on this style distributor cap is when there is too much resistance for the spark to jump at the spark plug it. We have a 99 Tahoe that has a P0300 code and we have replaced the distributor, cap and rotor, the spark plugs and wires, camshaft position sensor, throttle position sensor map sensor, ignition coil, and the fuel injection spider unit from the junk yard, the exhaust sytem and some other components as well. 18/03/2018 · Choosing a Backup Generator Plus 3 LEGAL House Connection Options - Transfer Switch and More - Duration: 12:39. Bailey Line Road Recommended for you. 07/08/2012 · I have a 1990 K2500 with a 350 TBI and TH400, and I have a late 90s wrecked suburban with a 5.7 Vortec and 4L60. I am wanting to do a complete swap from my TBI/400 to the Vortec/4L60. My question is about switching my gauges. I am wondering if there is any way that I could use my OE cluster, and how that would work.
My 2000 LTD Tahoe 5.7L Vortec Recently started missing at about 4,000 RPM. My Truck Will Run Well Then Strart To Run Rought New Wire Plug Then Claer Up Up And Then Do It Again Code P0300 Random Misfire. I Have A 99 Tahoe Ls 4d 4wd With About 86k Miles 5.7 V8.
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