How To Check Vehicle Rough Run, Stumble or Stall, Check Engine Light

Sam from http://www.professionalfleet.com in Lansing, Michigan shows how to properly diagosis a rough run of a car. He goes over it in great detail all of the things that could be wrong with the car and shows how it fix it.

Category:

Autos & Vehicles

[pyros46290]

"jump to the engine and take stuff apart" ... you have a VERUS and dont immediately pull secondary ignition pattern?

"this verifies the motor is good" ... not really ! you could still have high compression with a jumped timing chain!

im just givin ya sh*t. at least you got the point across that diagnosing is more involved than "plugging in a magic box that tells you what is wrong"

[ypsv17]

really 180 PSI is good? that is a big red flag for internal problems in the combustion chamber!

like shall we say a big build of carbon! as far as a tan spark plug that should tell the the tech that the cylinder IS properly firing! carbon can cause a missfire problem too by the increase of resistance to ground in the chamber thus, inhibiting the spark jump to ground and thus, causing a missfire. also, the LD9 2.4 twin cam as in this video has has a cast iron block WITH a aluminum head.

[JasmineCastillo20]

I have a Toyota tocoma it threw a code of p0170 fuel bank 1 it won't pass smog test

[chamkilas]

May b I'm wrong,but u look hell a high Mr. Mechanic.

[Rone170]

@hmfuku12 check the evap system and for vac leaks that would be a good start.

[heartlessvietboy]

Cars are getting more reliable. Automobile Manufacturers are building cars that breathe better.  Higher quality parts and engineering. Better fuel economy.

[SuperMadklown]

@hondaslave I just use a pair a sissors to grab the tip of the sparkplug to pull it out on my honda CRX

[zman366]

10,000 $ wtf is it made out of gold.

[hmfuku12]

Hey i have a misfire prob on my 97 lude wat could it be when i shift gears the acceleration drops down low then picks back up slowly and when i park a strong smell of gas or something is really strong comes from it

[hondaslave]

i need a plug socket like that...i have a honda with deep weel plugs, and when i use a standard plug socket, when i go to remove the socket stays on the plug...pain in the a..what kind is that, or do you have a special techinque you apply?