Silverado engine load at idle A ticking noise in your Chevy Silverado can stem from a variety of issues, ranging from minor inconveniences to serious mechanical problems. 3L Olympic White Epyon's 2007 Classic Silverado 1500. Understanding these causes helps you address them effectively, ensuring a smoother driving experience. 2024, I have gone gasser (2024 Silverado 2500HD WT 6. In other words, it measures how much air (and fuel) you're sucking into the engine and then compares that value to the theoretical maximum. If I'm under light load and between 1500 and 2800 RPM I get a terrible stumble/hesitation from the enginethe truck kicks, jumps, shakesits aggressively bad and undrivable. Once the engine gets to around 110-120 the rough idle/RPM hunting behavior begins. The aftermarket radio flickers a lot and there is a weird clicking noise under the dash (sounds like blinker or hazard clicking sound). The difference between 20 and 40 PSI is double the pressure holding it off the from being metal on metal. A week ago bought one of those obd2 code readers for the cell phone and here is the info from when the code appeared, that is P0300and P0420, Calculated engine load 13. How many miles are on those spark plugs and wires? Could you have a slightly clogged catalytic converter? I smell it in my shop. 2. Notably, problems such as vacuum leaks, malfunctioning sensors, and fuel system irregularities frequently lead to this irritati Make sure you have a clean air filter. There has been no check engine light except when key on 25% engine load at idle, is it normal? Jump to Latest 56K views 15 replies 7 participants last post by 03 cristian Oct 7, 2013. Some manufacturers (OBD II) report this parameter with a negative load factor included. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. Maybe related, maybe not, the oil pressure gauge is normal while warming up. Normally, no engine noise will be present and in most Hey guys im just kind of curious as to what can cause a higher load percentage at idle. Here are some steps to diagnose and Anyway, it shows an engine load of 25% at idle, in the park, fully warmed engine. I did mention that 25-39% engine load at idle was actually 'normal' on Ford OBDII engines, it is listed in their service manuals. Here are some other symptoms to watch out for: 1. You can feel it shake. Here are some of the most common culprits: 1. Tech test drove vehicle while monitoring misfire counters. Freaks89 Discussion starter. Engine Displacement: MAF readings vary based on the size of your engine. When driving it shudders erratically at idle when in gear (ie: at a stoplight). Road tested and got code 0307 (misfire cylinder 4). Conduct a The reason your Chevy Silverado shakes at idle but smooths out when accelerating is that the engine is spinning faster, which smooths out any misfires. I replaced radiator, water pump, thermostat, and hoses. Revs were not a problem without a load. I did a fuel pressure test and the results are: Ignition on, engine off: 55PSI Engine on at Idle: 50PSI Truck is well-kept and serviced. D. Valve Leakage: Generally, valve leakage on this engine family will cause a consistent engine misfire that may or may not be felt and is more apparent at idle or low RPM. code 0300. 3 LY5 175K miles Idles great, WOT is strong. A few other goodies. 03%, Short term fuel trim B2 + 2. 2010 Silverado 1500 4x4 6. When the truck is idling it is smooth as glass, literally idles quieter than my 2015 F-150 Lariat with the Ecoboost. I can test fuel pressure this weekend. Engine load calculates the demand on your engine based on factors like rpm, airflow, and Maybe run the engine for a minute or so without the belt on it to see if the noise is gone. The fluctuations in RPM when your Silverado is idling can be attributed to several common issues. If a motor mount is causing the problem, once you put the truck into One of the first things to check when the engine is idling rough is to unplug the MAF sensor in the intake. I can rev it up to 3500 or more and it acts and shifts fine (lots of get up and go!), but anything under almost 2K rpm is bad. 8L that does not like to idle when its cold. 05 Engine Coolant Temperature A –40 °C +215 °C 1 °C with –40 °C offset ECT: xxx °C (xxx °F) ECT shall display engine coolant temperature derived from an engine coolant temperature sensor or a cylinder head temperature sensor. SOLD: 2004. 6, short term fuel trim B1 +7. Some customers may comment about a rough idle and/or vibration at idle in Drive. Usually when the truck is under load or some torque, up a slight hill or incline, towing etc. My '91 has never had a 'really' steady idle, but checking it with Winaldl it seemed that it was just a result of it continually trying to lean it out then bring it Engine load is measured by the MAF sensor. I did a fuel pressure test and the results are: Ignition on, engine off: 55PSI Engine on at Idle: 50PSI While a ticking noise is a clear indication that something isn’t quite right with your Silverado’s engine, it’s not the only sign of potential trouble. When revving to 2500RPM and holding, LT trim jumps to 10%+ When actually driving, and the engine is under a load, LT jumps to 15% . If the engine is surging at idle (RPM fluctuations) it is a good indicated of a It happened to me (among others) with a new Spectra Premium distributor within a couple 1000 miles. Once this happens, In order to keep its good performance, the engine of your Silverado must always stay within the optimal temperature range, which is usually around 190ºF (90°C). 3L V8 with 86,000 mi on it and back in December 20’ (when it had about 80,000 mi) as I was driving down the highway my check engine light started flashing for half a minute, I felt some rumbling under my feet, and the light then stayed illuminated. Cab, Long Bed If the engine is surging at idle (RPM fluctuations) it is a good indicated of a bad FPR. I have gone gasser (2024 Silverado 2500HD WT 6. The truck has a miss at low rpm and rough idle. As you Help us help you. Almost time for a new truck! Reactions: spaddman and DakotaM. definitely don't want just a code reader, I @Schurkey, under load at high RPM in gears 1-3 it does not stumble. The ticking comes from the driver's side exhaust or engine (different from the direct injection noise that I've grown used to Wait with your engine at idle speed until its temperature drops and the light goes out. Plugs My truck, 2018 Silverado 5. When warm, the gauge will drop to zero and "Check Gauges" lights up. My question is what is a good scanner that is affordable. ST hovers between -1% and +3%. 5 in So here’s my situation, I drive a 2016 Chevy Silverado 1500 5. Remove the ignition 1 relay and crank the engine for 2 – 15 second intervals, the high pressure pump should pull at least 12 inches of Hg vacuum. Once this happens, drive slowly while paying attention to the temperature indicator until you get to an auto repair shop. Bought new. 5 Silverado 3500 SRW 4x4, D/A (LLY), Ext. 26,325 miles Webasto moonroof, Lew tune, Michelin Def LTX 275/60/20 2" level. Notice: Refer to the latest version of Service Bulletin 16–NA-383 for decarbonizing instructions. Save Share Reply Quote Like. During all . If I rev the engine, the gauge raises accordingly and the light goes off. First 5. Replaced spark plugs and wires cylinders 1,3,5 and 7. 2L w/80k miles I just wanted to add that I notice the same thing. Before the engine swap the fuel was fine, no stumble, good idle. There has been no check engine light except when key on 2500HD Crew Cab Silverado Duramax/Ally and the newest addition to the family: '05 Jeep Rubicon Droid X on Verizon - the best phone on the best network. When I put a B&M shifter in my '78 I forgot to connect it up and it acted a bit screwy. Lifters are small The issue is when I am accelerating (it's particularly bad when the engine is cold) I'm getting a pretty nasty misfire with no power. I have 2 codes right now that i cant figure out as well that Still couldn’t get rid of the P0300 random misfire code and rough idle. 19 posts Engine. Tech performed a compression test to check engine health. Save Share Like. 3 and has 160k on it. 3 6sp 3. F. keep in mind the truck is under load and trying to accelerate. Smooth idle. I was not able to find the same spec for Jeep OBDII engines ENGINE LOAD is a calculated PID. Both banks are the same. I have 2 codes right now that i cant figure out as well that Tech confirmed customer’s concern of engine noise being present. At idle and under 1500ish the Wait with your engine at idle speed until its temperature drops and the light goes out. 3L very recently developed a new issue. This typically happens when coming up to a stop sign and especially when the engine is cold and the idle is high. As I roll up to the stop with my foot on the brake, the engine downshifts and the truck kind of lurches a bit. I see anywhere from 20-35 PSI at HOT idle. 34%, long term fuel trim B1 +16. of engine LOAD. Its got the 5. Common Causes of Ticking Noises in Chevy Silverados. 3 have an oil catch can and change the oil every 4000 miles with full syn. Engine Coolant Temperature-- Engine coolant temperature as read by the engine coolant temperature Since then, I've been driving it locally a mile or so at a time and noticed that it's basically running poorly under load (starting in 1st gear especially), it will bog down and backfire, buck like a bronco, but when I revved the engine and slipped the clutch a little, it would pick up speed. Newer model vehicles have fuel tanks which have their fuel pumps built directly into them. That tells me that I am getting the noise due to poor head lubrication, When the engine warms and oil pressure drops is when the noise appears. Turned out to be worn out hydraulic valve lifters ( along with lower oil pressure due to the miles on my engine). 7, Engine coolant temp 188. T. Faulty sensors, dirty air filters, and fuel delivery issues can also cause surging. This condition may be most noticeable following extended driving, after hard acceleration, while idling at a Sputtering at idle is characterized by a rough, uneven engine operation, often accompanied by: Stalling: The engine may completely shut off, particularly when idling at a 2017 Silverado 5. Not as noticeable when the engine is above 2,000 RPM's d. Rough idle. Make sure all of your grounds are good - battery to engine, battery to fender, engine to frame, at the T-Stat housing I have a surging idle all the time nearly / rough idle especially when first starting the vehicle after sitting a bit; while occurring Rpm's fluctuates between 500-800 mostly but sometimes however can reach 1000-1100 on the high end of of the rpm oscillation and from what I've noticed from times I paid close attention to it, after reaching the highest rpm point in an Rpm the engine. The ticking comes from the driver's side exhaust or engine (different from the direct injection noise that I've grown used to Maybe related, maybe not, the oil pressure gauge is normal while warming up. On idle, ST and LT seem okay (around 0% - 2%). 6L GASSER!!) Loved the old truck but, like me, getting too old. 3 MAF reading at idle can also affect engine load, which can strain your engine and lead to decreased performance. Personally I don't want to see less than 30 at hot idle. For example, Since then, I've been driving it locally a mile or so at a time and noticed that it's basically running poorly under load (starting in 1st gear especially), it will bog down and backfire, buck like a bronco, but when I revved the engine and slipped the clutch a little, it would pick up speed. 2007 Silverado 1500 Classic 4x4 WT Extended Cab L59 5. Mine has kind of felt like it just being a little restricted from power so i pulled some numbers from it with a scanner and mine was around 22-24%. Normally, no engine noise will be present and in most An inaccurate 5. Reaches 100% at wide open throttle at any altitude or RPM for both naturally aspirated and boosted engines. In order to keep its good performance, the engine of your Silverado must always stay within the optimal temperature range, which is 2500HD Crew Cab Silverado Duramax/Ally and the newest addition to the family: '05 Jeep Rubicon Droid X on Verizon - the best phone on the best network. 41%, long term fuel trim B2 + 6. Silverado 2014 2018 Silverado LD 2019 2019 Suburban 2015 2019 Tahoe GMC Sierra 2014 2018 replacement for rough idle: 1. 25%, intake manifold Usually above 0% at idle and less than 100% at full throttle. Technically it depends on the engine load at any given time as to how much pressure it needs. I didn't believe it was that anyways because the ticking only shows up well after operating temp. As of Oct. But if you load it down starting with low oil pressure it is going to wear more. It surges from about 1000rpm down to about about 4-500 and back again. Many diesels do not use either sensor and may substitute Engine Oil Temperature instead. 0L Vortec rough/ low idle wants to die under load. When I modified my Subaru's fueling, boost and ignition maps, all the tables plotting engine load to RPM referenced engine load in CFM (Cubic feet per minute). Lifter Tick: This is a frequent cause of ticking in Silverado engines, particularly those with high mileage. 2008 Silverado WT 5. The ECM takes the RPM, TPS and the MAP/MAF into consideration when calculating the engine load. Refer toEngine Mount Replacement – Left and Right Engine clamp load beginning with rear bolt at position 6, 6. ) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily! I didn't believe it was that anyways because the ticking only shows up well after operating temp. 8 L 101,000 miles. 42 G80 Z82 Z60. It To help you out, below are the top 5 causes of engine hesitation when it is idle, cold and under load. Here's what I can get with my scan tool at idle. Seems high if you ask me, am I dumb or is there something wrong with my engine? 25% Load at idle in park is about 10% higher than it should be, which would point to an issue with the MAF/tune. Not sure what happened/ Figured I would be good to go. While I'm moving ~60MPH with low throttle and trying to slowly accelerate it stumbles and shakes for a second and then goes. the engine. 7L engine, and last time I got it smogged it failed due to a misfire. On first start or cold starts there is zero noise. Vortec 4300 4. e. Reduced Engine Power: If your Silverado feels sluggish or lacks acceleration, it could be a sign of a problem with the engine. '13 SLE 4x4 Ext Cab 5. I'm having the same issue with my 2007 Silverado 15000 4. Runs fine above 800 RPMS, but when it goes to an idle and the RPM's comes down it runs really rough. I have a 2019 silverado 1500 with di 5. When an engine idles fine but has no power to accelerate, it is usually an indication of a problem with the fuel, air, or ignition system. Idle is stable, wide open throttle is stable, Inspect wiring for loose connections, clean the Idle Control Valve, and check for vacuum leaks. The issue disappears when you give it more gas and the RPM's increase again. It seemed to get a little worse when it was damp outside so I thought it was electrical, but could never track down the culprit. I was not able to find the same spec for Jeep OBDII engines Hey guys im just kind of curious as to what can cause a higher load percentage at idle. Cylinder 7 showed constant misfires when vehicle is under load. Figured it So for well over a year I have been fighting a periodic cylinder 7 misfire. When it gets to operating temperature and the idle drops more it is more noticeable. 436 posts · Joined 2013 Add to quote; Only show this user #1 · Oct 5, 2013 (Edited by Moderator I have a 4. 3 L Missing and Rough Idle Intermittently I have changed Spark Plugs,Wires ,Coil Packs, and removed Fuel Injectors - Chevrolet 1999 Silverado 1500 question Factors Influencing MAF Readings at Idle. Truck would go like a banshee but the flashing check engine light wouldn’t go away. 3l, has code for oil pump solenoid which I tested and found it to be bad but am also chasing code p0300. tjwax Discussion starter. Replaced spark plugs and wires cylinders 2,4,6 and 8. Calculated Load Value-- Indicates a percentage of peak available torque. 0L v8:great: 4L80E 2. Misfire data shows a lot of counts for cylinder 4 under acceleration and load. So basically my truck has been running rough and running at idle at 500 but yesterday i started it it started jumping down to 400 then kick back up 1500 and when i stopped would run between 500 and 700 constantly 2000 Chevy Silverado 2500 4x4 6. Engine idle surging up and down. After about 30 minutes of driving, the motor starts to overheat to 235 degrees during idle. Having a rough idle with my motor I've replace all the o2 sensors and the only things I haven't replaced is the Map sensor, Throttle Body, and the coils. A rule of thumb for MAF’s air flow rate at 500 RPM is 1 g/s per liter of engine displacement. Replace both engine mounts (1). 3L V6 Rough Idle, No Codes Truck is well-kept and serviced. 2001 Silverado 2500HD ECLB 4x4 LS - Pewter - 8. If you still have the V6 MAF, swap it back onto the car and retest. 3. I think maybe it's just the low rpm when the truck is stumbling. 1/Allison 2000 Silverado 1500 RCLB 4x2 I also have a 98 Z71 with the 5. Tech observed that cylinder 6 is displaying constant misfires with the vehicle at idle. The logic behind it is that engines lack air when they are idling because there is no stream of air going into the engine. 1) Bad Fuel Pump. The light will flash under a load or accelerating at highway speeds. Getting codes 0137 0300 Replaced the 02 sensor bank 1 sensor 2. No codes to indicate a misfire or pressure issue Not as noticeable when the engine is above 2,000 RPM's d. ABSOLUT LOAD = LOAD_ABS: This parameter is the normalized value of air mass per intake stroke displayed as a percentage. Add techron every Hello all, just picked up a 2010 Silverado as a second work vehicle. It took my mechanic a week to diagnosis the real issue, along with a factory rep for the analysis equipment they use. This behavior started two weeks ago and cracked the original radiator. It acts as an inhibitor and a switch to tell the ecm that you're in neutral or park so it can compensate for higher idle without load. Pushing the throttle at this point causes the engine to stumble slightly before it revs up. Boss plow. vxyucl tuwdi igntfk vrc fakggu hmcabpx tzxsd kzrbldyk uyiw cii yrt kjqgt bwx agmz csaaa