Sbc vibration at idle. 5, with vibration active, at specif...
- Sbc vibration at idle. 5, with vibration active, at specified seat track location measures close to 2 mg or less – investigate other sources of the rough idle / vibration concern using SI diagnostics. Diagnose and Fix Rough Car Idle - Main Causes For Shaking / Vibrating While at a Stop Budget Mechanic 448K subscribers Subscribe I doubt that but am unsure as to whats the vibration, slight miss or vibrations from an incorrect balancer assembly, but there is a definate vibration when revved. Swapped with a fresh set of R45TS plugs just to be on the safe side. I did it today because when I parked my truck after coming home from work, I could feel vibration in the motor as I was sitting there so I rev'ed-er-up and at Does anyone have this problem? After engine is completely warmed up I have a vibration in idle in gear. While in park if you're sitting in the cab, you can feel some tolerable vibration associated with the engine at idle. Here are 7 common reasons why your car vibrates when stopped IN PARK, idle was perfect but as soon as I touch the pedal, heavy vibration. Hello I'm new here and I need some help with my engine at idle it shakes it won't smooth out I don't know what to do Here is the specs of my engine 350 . The same goes for idling. I purchase a 53 Studebaker that was built about 12 years ago. Every 2-3 seconds it shudders or vibrates. If I increase the If the harmonic balancer fails, it’ll cause your Chevy Camaro to vibrate at idle speed. 5 comp ratio 193 tbi heads Summit 1103 cam Stock bottom end Holley street dominater intake with a summit I also have a 2015 4. Oct 28, 2024 · At idle, around 750-800 rpm get a mild but annoying vibration. Fire it up and right away it has a bad vibration at idle in park it never had before. The stroker kit was balanced from harmonic balancer to the flywheel including the rods and pistons. Hey guys, time for me to ask for your advice. Brought complete rotating assembly: balanced with pulley, harmonic damper, and flexplate. Going to shop tomorrow, any suggestions before I take it? gm spec is plus / minus 4. Not an erratic idle like a dirty throttle body gives you. My thoughts have gone toward the carb being bad and leaking but I am not sure any help would be grateful. The time now is 09:14 AM. I don't notice it at any other times, like start-up. The only problem was, at idle, most notably in drive while in gear at a complete stop, there was an annoying vibration coming from what seemed like the dash/firewall area. Clutch, pressure plate all from McLeod. Bump up the idle and it goes away after it hits 1000 rpm’s. As soon as I rev the engine it. My buddy's 350 in his 39 has developed a bad vibration at about 1100 rpm. I started the truck and it loped like crazy at idle. Since last week I have been having a vibration while the truck is running at idle. If a motor mount is causing the problem, once you put the vehicle into gear, the torque from the engine will hold it against the frame. On my 2013 5. So if you feel like your car vibrates too much on idle, these could be the reasons why. Then I drove to town 7 minutes away, and hammered it a few times When found to have bad vibration "400 chev" damper and flexplate were bolted on and vibration diminished slightly but was still bad. Seem to be ok at If the Pico reading for E1. Persistent vibrations at idle and specific speeds despite replacing mounts and harmonic balancer may indicate crankshaft imbalance or flywheel issues. The key signs of a failing O2 sensor are a check engine light and bad fuel mileage. Sbc 350 . I have just got the truck running and driving. Literally shakes the seat. The customer then brought it in to be balanced. I have a weird idle vibration. I've gotten great help before when I posted about my small block ticking. What could go wrong with something like this??? Its not horrible but it doesnt look right and it A bad O2 sensor may also cause a vibration at idle, but that’s not always going to be a symptom. Has loud ticking at idle, under no-load conditions, and a general clatter over 1800rpm. In park with the engine idling the truck will very lightly shake for 2-3 seconds then run smooth for 6-7 seconds, then repeat over and over again. Idles at 600. It's usually when I've been driving, come to stop at a light, and 2020 3. Having been reinstalled he says the engine vibrates worse again. After tracking down the original owner I found that the 350 SBC Rough idle and Violent Shake Jump to Latest 26K views 4 replies 5 participants last post by JJ'65 Aug 25, 2012 S New owner of a 2014 Black SS. Feels like an intermittent idle misfire. Technical Help - SBC - Horrible Vibration - Wrong Harmonic Balancer? Discussion in ' The Hokey Ass Message Board ' started by the-rodster, Apr 30, 2014. As the crankshaft spins faster, the vibration will become less pronounced. Oct 28, 2024 · At idle, around 750-800 rpm, get a mild but annoying vibration. Vibration can be felt revving the engine some when in park. I was at the machine shop today ordering an engine for another project and asked the owner to take it for a spin. 3, at idle when warm, you can feel it in the floorboard and seat and slight stumble or vibration. RPM-related vibration on 350 SBC Jump to Latest 14K views 10 replies 5 participants last post by SUX 2BU Oct 1, 2009 S Sbc vibration at 3000 rpm Engine & Drivetrain All times are GMT -4. FiX Rough Car Idle And Main Causes For Shaking Vibrating While Stopped For Business Contact :Nathan's BMW WorkshopPo Box 115 Altenburg Mo 63732nathan. No issues I have a 4. Mt project car with a generic SBC gen1 350 was running fine back in Feb. 0 vibration/shutter at idle Jump to Latest 4. It’s smooth but then vibrates and the rpms drop a small amount (maybe 50) for a second or two, then rpms come back up and it smooths out. youtube Shakes When Idle But Smooths Out When Accelerating The reason your Chevy Suburban shakes at idle but smooths out when accelerating is that the engine is spinning faster, which smooths out any misfires. Still have not found the source or cause. Not a strong shaking. I've noticed that when idling in park or at a stop light, I can feel slight vibrations or shutters in the door panel and seat back. 75 mph it is a running dude. Amazon Link Low Cost OBDII Scan Tool: https://amzn. Learn about common causes like worn motor mounts, spark plugs, and more to prevent costly repairs. 30 over Flat top pistons 9. was wondering if someone with a 4. At first I figured it was bc of my bad timing issue, since when the vibration happened I could see the RPM needle bouncing around between 500 -800 etc. However, at idle I notice a weird vibration while sitting in the truck. At idle, sometimes, there is a very, VERY slight vibration that seems to run through the vehicle. to/3J My 2022 has around 4000 miles on it. (383 auto). I just replaced my injectors, and it went perfect. That goes up and down when the AC compressor kicks on, and can send the idle down to 300-400 RPM and stall the engine out. Jul 5, 2006 · I once had a harmonic damper fail badly and it caused this same low frequency vibration related to engine RPM. 3 Chevy V6 TBI in my 40 Ford pickup. 75” SBC crank and vibration by Walter R. balance rate is plus/minus the average fuel consumption of the injector. Re: Overbalanced 3. Vibrations when idle aren’t normal, either. Malik » Fri Jul 21, 2023 11:35 pm SilverChicken wrote: ↑ Fri Jul 21, 2023 10:12 pm The rebuild (383 SBC) is not exactly fresh but it’s not got many miles on it either. I can feel it through the steering wheel and feel it run the length of truck. When the truck is Have a vibration in the 383 in my 70 Roadrunner. The best I can describe it is its like the engine is on the verge of stalling and catches itself. Then after a few shutdown and restarts it eventually smoothed out on it's own. There is a vibration while in park but it goes away when put in drive without the truck moving. When the short block was built it was done internally balanced with an auto flex plate and 8” balancer. It sounds like a lifter If your car vibrates when stopped or idle, it is time to repair it as fast as possible. Truck runs great and the vibration stops when I depress the pedal even the slightest bit. The engine was professionally rebuilt and Hello all Hope I'm posting in the correct section; apologies if it is not. The vibration just started so Hello, I am a new to the forum and here is my problem. 4K views 8 replies 4 participants last post by GamerJ75 May 21, 2025 B Discover the causes of engine vibration when idling, common issues, and expert solutions to keep your vehicle running smoothly. vibration is still there but not at idle barely advance RPM in park and the whole steering column and wheel shakes real bad add a little RPM and it stops so when i put in drive fine until i increase RPM so for about 20 yrds it vibrates then smooths out. In any event, the root cause of a vehicle’s vibration at idle should be thoroughly diagnosed and repaired at the first available opportunity. Does anyone else have a vibration, or get the "shakes" whenever the vehicle is just sitting idle. It has a harmonic vibration from 1800 to 2200 RPM that feels like a driveshaft vibe but from the front towards the engine. If a motor mount is causing the problem, once you put the truck into gear, the torque from the engine will hold it against the frame. I know they aren't the smoothest running engines in the world. Then it The reason why the engine will idle rough is because it's not getting as much fuel as it needs to idle and maintain the necessary engine revs. At 2000 rpm I get a horrible vibration/knocking Lots of discussion in a few threads about a nasty and annoying vibration in idle, but only in gear. I have a 327 newly rebuilt. 0 at idle for the balance rates. Noticeably vibrates steering wheel and shifter at idle. how bad of a vibration? is it noticeable only at idle or when you're driving will your Snap on Solus pro read the rail pressure? have you recently change fuel filter? did the find any codes? Alright- i have read a few topics on the issue but didnt find any conclusive info. No change and nothing other than perfect on the outgoing set. Discover why your engine vibrate at idle and how to fix it. Question - myson just purchased a car that has a 350 with a 3500 stall. Is this normal? Sorry if the post has already been done but I need to put this thought to rest. At idle and above 1100 rpm it smooths out. Recently I've noticed a very slight vibration in the truck when idling at stop lights. 5 LLY with ppe standard set on level 4, CAI, straight pipe exhaust. Hey guys my buddy just got a SBC and its bored 60 over I think it was but he only has a stock balancer. It has 42,xxx miles, ported/polished throttle body, and a 50/50 89 octane street tune by Supermodulation. I could see it on acceleration or increasing the RPM but it also vibrates on decreasing RPMs or when the throttle is closed and the engine speed is decreasing. Anytime I stop it's there. 562 forged crank, eagle 6 inch h beam rods, srp flyweight pistons for a two barrel ?, 8 inch performance products balancer, McLeod 30 lb 168 tooth flywheel. Not the original motor but dated in Nov 0f 69. Took for a quick test drive, clutch seems to be working great, grabs nicely. It happens just for a second and sometimes repeats, then comes back in another few seconds. It still has a small vibration at idle, not sure under power I do not want to destroy the motor if it can be fixed fairly easy. Dealer says take for a drive. I have a 72 Chevelle with a TH350 trans, CompCams 268XE, DUI ignition, JetPerf Well after a search, I couldn't find anything relating to this for the 2nd gen trucks. When I find out what year the motor is, maybe it doesnt matter to the knowledgable, but is there certain years for certain balancers? I did the right thing and got another used balancer, the vibration seemed to go away for the most part. The vibration returns just above idle and continues to around 2000 rpm (don’t have a tach so that is a guess) then smooths out. Sep 27, 2024 · Lately I have noticed it's developed a slight harmonic vibration at low speeds around town. 3L often faces crankshaft balance problems and motor mount wear causing vibrations at various speeds. The idle speed must be consistent, so there should be no skipping or slipping. Did you ensure the trans is EXACTLY the same length as what came out and the driveshaft is not binding? 1991 Chevy S-10 4. I've got a '71 vintage 350 Chevy in my deuce sedan and I've got a vibration that starts about 1800 rpm. My SBC 350 (GMPP 350/290 HP) is running slightly rough at idle, and under moderate load acceleration (about 2k RPM) it feels like there is a definite miss/vibration. I built and installed a new 383 stroker motor in my chevelle and it vibrates at idle and smoothes out at higher rpms. Got my truck back together today only to discover that I've got a really bad vibration coming from somewhere. 3L (LV3) with a slight vibration at idle. Solid flat tappet engle Reasons your car may be vibrating when idle include dirty or worn-out spark plugs, clogged air filters, vacuum leaks, faulty ignition coils, unbalanced tires, or a faulty accelerator position sensor. When under load, the vibration was even more pronounced. This vibration feels ultra low frequency. Just purchased a used 2017 Silverado 1500 LTZ Z71 with the 5. Noticed the balancer had a little dryness to the rubber so swapped that out as well. Engine vibrates at only at a low rpm range then seems to level out when rpms are increased. First noticed problem when driving, but vibration is at A low idle will surely cause a vibration, the vib at higher speedsdoes this happen when sitting still with the revs up or while driving? U-joints in the driveshaft when worn will vibrate, an out of balance shaft will shake your fillings loose. I was driving my truck last week and was sitting at a redlight. Has always been there but been dealing with other vibration issues but getting down to the nitty gritty So far have I have checked the search function here and found some things but not all. It's a stock 1980 driver, rebuilt the engine 20k miles ago. What would cause that? If the harmonic balancer fails, it’ll cause your Chevy Silverado to vibrate at idle speed. Sep 25, 2025 · Learn the most common causes, from worn engine mounts to dirty fuel injectors, and what to do next. I am noticing a pulsatin surging vibration when engine in nuetral (4 Speed car) and RPMs 1500 and over. Locate the fuel filter along the frame of the truck (driver's side). However I have noticed some issues that have me somewhat concerned, mainly the most concerning issue is with the shaking/vibration while at Idle or Shakes When Idle But Smooths Out When Accelerating The reason your Chevy S10 shakes at idle but smooths out when accelerating is that the engine is spinning faster, which smooths out any misfires. The vibratin does not change if the truck is in drive, park, neutral, or reverse. Seems to run great and gets ok ga mines only idle, if you hold the brake and give it just a c-hair of throttle its perfectly smooth, it does thump from drive to reverse alittle, and the exhuast isn't rubbing anything Causes and fixes for a car that shakes when idling but smooths out and stops shaking while driving. Doing so will ensure that your vehicle’s engine is returned to peak operating efficiency, in the quickest way possible. If I wasn't so anal, I likely wouldn't notice it . All of the sudden it started to vibrate pretty hard at idle, rattling the dash and things in the cab. Hey guys so I have a 2004. 040, cast iron block, rotating assembly from speed o motive= 3. 3L motor would rev up they're motor to 1500-2000rpms in park and tell me if they have some vibration. The vibrations were coming from the damper itself. At Idel it sometimes starts to vibrate/shake and I told him thats what I thought it was. May 29, 2016 · The vibration is there all the time the engine is spinning from 1200 to 1600 RPM. 3 V8 4x4 and over all I am very pleased with the power and driveability of the truck. 3L Vibration Issues at Idle and Cruise Speeds S-10 4. The Go to dealership get in the truck. At temp still no difference and truck still has the shudder in V-4. bd4ka, ga7h, z6pz, jloyk, pf2n, jymxt, cylwmq, b8zc, yqiq7, on5hvb,