I had a 900rpm idle in park, turned out to be a vaccum leak with the PCV stystem. Recommend replacing the part but electrical tape has great quality’s of elasticity and sticky when heat is added. Your only issue would be making sure it’s aligned right so you get full flow throughout tubing and elbows
If you check car with the intake hose not coupled with thr body you are creating q huge intake's amount of air miscalculation by the pcm which creates a very unstable air fuel mix, pcm trying to adjust fuel trim, and another problem on ur diagnosis. Lots of test everything "looks" good, issue not resolve. Definitely not my way to go, bur the video is still a help for a lot of people so thank you for the video my man.
I ended up removing the intake manifold and soaked all those intake valves with combustion cleaner over night. Next morning drove car hard, goal was to clean those heavily carboned up valves so engine could idle normal. Misfire gone. Did record but misplaced footage. Theres different ways you can go by at diagnosing different idle problems. Thanks for watching bud
Today I was driving a car and slowed down pretty abruptly. On the next light I noticed a slight vibration in the motor (kind of knocking sound). When came home did diagnostic w/Actron, it gave me P0404 (before it gave code P0446, with Engine light on, I erased it, the code gone). Before Idling was on ~800, normal driving. I replaced EGR like 4 months ago. Now the arrow vibrates back and forth, rather rapidly between 400 and 1000. The vibration increased. What that can be? Can some clog in the exhaust pipe course that vibration? Thank you for the informative film.
Had a rough idle on my 05 PT ,replaced a lot of parts and in the end checked cam timing and the exhaust cam was 1 tooth retarted ...had me pulling my hair out but all fixed now.
O wow bud..I did a video on that very topic.. The giveaway on timing belt being the suspect is the engine vacuum would be extremely low..But yep, at idle it will run terrible and depending on the year, sometime they will set a fault code name timing belt off 1 tooth
I have a rover75 1.8 petrol am having constant misfiring it has new sparks plugs oil filters no air leaks morning start is ok then temp gets round 50 boon misfiring constantly
A small vacuum leak can cause something similar to this at idle, too. The leak becomes insignificant at wider throttle under load because of the higher air flow through the engine. I had a similar problem which wound up being a leaking gasket at the check valve for the power brake booster. It only affected the cylinder whose intake runner was closest to the fitting that fed the brake booster.
Wow..dam good input man..lol..when these older cars come into the dealership all the mechanics run...most none of the newer stuff here run off vacuum anymore so we hardly ever see this stuff
@@OnlineMechanicTips Maybe that's a good thing, the vacuum lines in the older cars could be a real rat's nest and the rubber that the carmakers used was pretty awful...it would go brittle just after the warranty ran out!
Hey bud, yes, sure a fuel pump thats delivering low fuel pressure could cause this problem. But monitoring the fuel pressure with a guage could help verify such. Thanks for watching. Please thumbs up the video and subscribe to the channel. Thanks
Hey bud, I ended up doing what I call a liquid valve job. I did film the footage but have yet to edit and upload it. I was able to knock some of the carbon off the intake valve enuff to where the valve would seat properly and that misfire was not detecting it anymore. Thanks for watching bud
