How to Diagnose Car Running Rough

Рет қаралды 83,342

7 жыл бұрын

A car running rough can be tricky to diagnose. On this episode we reveal a common source of faults that can cause a rough idle or at times a stalling condition, and how to easily diagnose utilizing a smoke tester.
Great Smoke Tester if you will be testing many vehicles (Professional Use ) : amzn.to/2jm51ol
Smoke tester ( inexpensive) : amzn.to/2iuX8so
Be extra cautious if you are going to utilize a carb spray to isolate vacuum leaks (very flammable).
Reach out on twitter for help ---@urmechanic.
A few more vids that may help :
Engine Oil Clues--Health kzfaq.info?video_id...
Honda AC Clutch : • Honda Pilot AC Clutch ...
Kia Hub Bearings : • Nissan Murano Camshaft...
Nissan Murano Camshaft Sensors: • Nissan Murano Camshaft...
Coolant System Oxidation • Engine Coolant System ...
76 Corvette Repairs : • Classic Car 1976 Corve...
Oil leaks www.youtube.com/watch?v=if5KO...
Timing Belt Tips : www.youtube.com/watch?v=LlQzs...
Follow us on FaceBook : / desertcarcar. .
On Twitter : / desertcarcare
Website : www.desertcarcare.com/

Пікірлер: 58

@temujinkhan6326 Жыл бұрын

6 years later I come across this really good video. After having my spark plugs replaced twice in a week and cables and then ignition coil, all fuel injectors and thermostat (another issue) the truck is still running rough. I am going to test this myself because it seems my local mechanics are not very good

@hotpackjay 8 ай бұрын

Thanks for the lesson. Spraying brake kleen on the vacuum lines of a customer car may not be the best idea but for my stuff sure. This helped me gain understanding of the theory so thank you

@pkvidmanback Жыл бұрын

great display of workmanship and knowledge, although irrelevant to my issue, i learned a lot :) Thanks for a great lesson

@Desertcarcare Жыл бұрын

Thanks Luke

@jetknight5051 4 жыл бұрын

Engine that idling up and down is a bad idle control valve that was in my case put a new idle control valve and it's not idling up and down anymore.. but it can be caused by other issues too.

@HomeMadeBoards 4 жыл бұрын

10/10 well presented. Well made. Good job, thank you.

@Desertcarcare 4 жыл бұрын

Jesse Turner ~ thanks for stopping by !

@NewLevelAuto 4 жыл бұрын

Fun to watch you in action Frank . Cheers

@Desertcarcare 4 жыл бұрын

New Level Auto ~ right on ~ thanks for stopping by

@tysoncross3350 5 жыл бұрын

Very detailed , good stuff .. iv got a vq30dd nissan and its idle is more like vibrating the motor during low revs , as revs pickup it goes away but still feels sluggish. Floored the car and symptoms went away . Now after doing an intake cleaner test (spray past maf ) cars GDI and is reccomended to clean valves. Now problem is back , floored it againt to see if that helps but its still running rough down low , almost like its down a cylinder . Not too sure where to go from here . Iv got general knowledge mechanically but im left scratchn my head.

@Desertcarcare 5 жыл бұрын

Tyson Cross ~ utilize a vacuum gauge by taping in to vacuum source. Your watching that gauge for rapid fluctuation which is an indication that you have a valve train issue that could be causing that symptom. Give that a try ~ hope that helps ! ~Frank

@56Saint172 5 жыл бұрын

Hey Excellent and concise Video. I have a 2009 Chevy Aveo with a code P0171 system lean Bank 1.. The car also have poor acceleration and bucking at Highway speed.. Please any input would be greatly appreciated.. And thanks before hand.

@carlos92161 5 жыл бұрын

I just go to said thanks for teaching us personally I appreciate it for everything what are you doing

@Desertcarcare 5 жыл бұрын

Carlos Linarez ~ thank you. Join us for more recent updates here www.wrenchnation.tv/ ~

@littletonybekind 6 жыл бұрын

Hey man. Very very good video. Professional and knowledgeable.

@Desertcarcare 6 жыл бұрын

Antonio Aguilar Bahena ~~appreciate you brother ~join us every Wed for our Car Talk Show at 4pm MST Listen Live ➡️ bit.ly/2Eqp4Ki

@ToyotaLand4d56 3 жыл бұрын

Thanks for this video on diagnosing rough idle.

@Desertcarcare 3 жыл бұрын

Glad it helped !

@ToyotaLand4d56 3 жыл бұрын

@@Desertcarcare It really did.

@rahoulrampersad924 5 жыл бұрын

Hi...i have a Mitsubishi lancer 1998(Carburetor). The problem is that in the morning it has a slow start and i have to press my accelerator for it to start...moreover, it hesitates and have a rough idle...sometimes if i accelerate to the max, there is black smoke coming out from the exhaust...can you help please.

@hankbridges5055 5 жыл бұрын

Get a Actron CP9690 code tester. It checks live, record, graphing, emissions readiness test, oxygen sensor test, transmission codes, ABS, SRS, and MORE! Get a USB cable to update it. Get 4 aaa batteries for under the rear cover. EBAY has it.

@roadstar499 5 жыл бұрын

I made a awesome smoke machine for $5 which is by far the best method of locating vacuum leaks...

@Frangulate 5 жыл бұрын

roadstar499 how’d you make it?

@marcianomcmahon9484 4 жыл бұрын

if there is no leak as you have just found, does stale engine oil can cause the same engine sound, i mean the sound up and down during idle.

@Anna-tc6rz 5 жыл бұрын

Thanks for the vid! Can a bad pcv valve cause overheating? My cars been overheating only when sitting idle for a few minutes and if you start driving it cools down. I figured they were seperate issues but just curious as to if that could cause it. Lucky me had to order the valve so I'm still waiting to replace it.

@DDR233 Жыл бұрын

Sounds like your fans aren’t kicking on

@disabledsubmarinevet6717 6 жыл бұрын

I am a disabled vet with a 2006 scion xa set up for my disability . Right now the cigarette lighter does not work . If I plug in something to it the radio goes off but when I unplug it the radio comes back and it does not lose stations. I replaced the fuse and the cigarette lighter and have tried different things in the port to see if its just 1 or 2 causing the problem I am a backyard mechanix as I was taught that in the NAVY . So I am lost also money is tight so I hope to fix it myself

@Desertcarcare 6 жыл бұрын

Kenny Hickerson ~~call me directly at the Garage & I will get you through it ~~a big hugs thank you for your service~~ I was USS Peoria LST Navy 🤜🏼🤜🏼

@Gleb1986Kiev 7 жыл бұрын

In my country spark plugs and dirty throttle with dirty MAF sensor usually causes problems like that. And believe it or not but had never seen a smoke machine around here by myself)))

@Desertcarcare 7 жыл бұрын

KIevMan ..Lol ..indeed my friend !

@roadstar499 5 жыл бұрын

Yes dirty or bad Maf sensor causes all kind of issues..

@overkill0074 7 жыл бұрын

I have a 2007 Chevy Silverado classic 4.3L. When it's in drive at a stop light the engine starts to vibrate. When it's warmed up, and 15-20 minutes of driving, the symptoms go away. I've cleaned the throttle body, and that helped very little. The transmission shifts perfect, no problem there. Any thoughts as to what this might be?? Thank you, love the vids!

@Desertcarcare 7 жыл бұрын

james Campbell ...as long as the CEL is off...make sure you check those eng mounts..otherwise make sure all fuel trims are good to go..reach out at the garage if I can help further...thanks for stopping by.

@overkill0074 7 жыл бұрын

Thanks again Frank much appreciated. I'll look for a good diagnostic shop, and see what the fuel curves look like. No CEL as well.

@josemuralles226 7 жыл бұрын

hey just wondering, when buying a used car should I check the fluids= brake fluids, engine oil, power steering, ect before or after the test drive.

@Desertcarcare 7 жыл бұрын

Jose Muralles ..absolutely. Here is a great video detailing that as well what that engine will really tell you kzfaq.info/get/bejne/mreAjJZi3ti5nJc.html Additionally..best to get a pre purchase inspection before you buy. Protect your wallet! Thanks for stopping by ~~Frank.

@roadstar499 5 жыл бұрын

check everything! once you buy it its your baby!

@Pedro-qm1of 4 жыл бұрын

I think you could also buy a pipe tobacco cigar, you smoke it and then you exhale the air on one of the vacuum lines preferably near on the engine cabin air filter and with some luck you may find it on the first try. Ps Smoking kills but one smoke has never kill anyone.

@Desertcarcare 4 жыл бұрын

Pedro Suarez ~ seems this done years ago ~ if it works ~ it works !

@jeremiahmoyer8876 4 жыл бұрын

The combustion might leave residue like you'd find inside of a pipe or in the filter of a cig cigarette...or the goop in your lungs.

@amirhoseinkargar3733 2 жыл бұрын

Hi. I recently encountered a problem with my car . My car is a 2003 peugot 1.4 manual trasmission . The problem comes as you put the car on first gear run a little bit then you press the clutch .... If you release the cluth without shifting to a higher gear itll jerk .... It happens on every gear but on the heavier gears it gives you a harder reaction. What dou think it could be...

@larrygingerich2585 Жыл бұрын

The clutch is slipping. It can actually go something like this; slip- jerk - jerk and then go, or even a bit more of that etc.

@johnnywooten1093 6 жыл бұрын

I'm having a idle problem.its a4.3 vortex it seems to run fine when first cranked but once I've drove it about 10 or 15 mins it idles really bad almost shutting off I've replaced the distributor and button checked all the vacuum lines and the mass air flow sensor there all fine what could this be??

@ufohunter5114 5 жыл бұрын

Clean your intake pull your big hose off clean with rag changed my performance of my vortex

@18deadmonkeys 4 жыл бұрын

Same exact problem on my 5.7. So far I've replaced the IAC and MAP to no avail. Gonna try looking for air leaks when the rain stops. Did you find the issue?

@dracgotbands 3 жыл бұрын

My car idles rough after a cold start for about 10 seconds then runs fine afterwards, any ideas?

@74sttelevision58 6 жыл бұрын

My car feels very bumpy I've changed the shocks and I put new air bags I have a Lincoln Town Car 2009 what else can it be?

@Desertcarcare 6 жыл бұрын

74st Television ~~that’s a phone call. Ring me for quick tips.

@davidnatiel6886 5 жыл бұрын

Why is it that mechanics never put their seatbelt on? Lol

@3232myke 4 жыл бұрын

Because mechanics don't die they lie n multiply

@Eddythe_Eagle 6 жыл бұрын

Sorry but what is a CEL

@Desertcarcare 6 жыл бұрын

Edward Ryback ~~a direct link (light displayed on dash with an engine symbol) warning you of a power train management fault~~if it is on~~needs attention. Great question & my apologies for not being clear on this .~Frank

@nickv4073 6 жыл бұрын

You could have been less technical and just called it a "Check Engine Light" on the dashboard.

@spooky3173 5 жыл бұрын

if you dont want to buy a smoke machine you can just buy a deck of ciggys (i recomend winnie blues or marlboro reds if youre from us)

@richardb.5691 6 жыл бұрын

Obvious vacuum leak in the intake manifold gasket (s) somewhere. Of course, your typical mechanic will want to replace plugs, wires, injectors etc because there's money in that.

@Desertcarcare 6 жыл бұрын

Dick B. ~or they may not want to introduce a new symptom & a comeback by reinstalling aged parts that have to be removed as a part of the repair procedure.

@DougHinVA 4 жыл бұрын

common sense... check hoses for any that are cracked or collapsed or damaged in some way .... and replace them. A 'mobile mechanic' if available, can do it better and faster than you and it is likely a 1-time process.