Scotty, Im a big fan of you and your videos; thanks for helping us all out.
2001 Honda Prelude (H22A4 engine) with 5 speed manual transmission, and about 115,000 miles.
It will smoke upon acceleration after an extended deceleration (15-20 seconds or more) ie, coasting down a hill, foot off the throttle, allowing the engine compression to maintain my speed.. The smoke is thick enough for me to easily see out my rear view, but not like a huge cloud, and only lasts for 5-10 seconds and then clears up.
Also, I have noticed if I don't "open the throttle" somewhat regularly for a gear or two, sometimes the car will randomly stutter a couple times after its first started, after about 30 seconds of running, sometimes a couple minutes, but its usually after Ive backed out of my driveway/parking spot, and Ive started to drive away, but then it clears up and drives fine...I dont have this problem unless I regularly drive like a granny.
My inclination is possibly some emissions system malfunction, or maybe worn valve guides, but my fear, is its maybe the oil rings on the pistons.
Other than the slight oil burn, the thing runs great. It did overheat once (the temp gauge went very near the red line in stop and go traffic because the engine temperature sensor wire was cut and at the time, I was unaware of that issue because I bought the car in the dead of a PNW winter and there were no codes) I turned on the A/C and the fan did kick on and lower the temp, but there were 5 minutes or so where it was really hot (not steaming or anything) but the gauge was really high.
Ive occasionally had a check engine code read misfire (sorry dont have the exact code) on random cylinders, but I will clear the code and it stays away for a year or so. Also the codes never seems to pop during or after I notice any of the aforementioned issues.
I checked the compression quite a few years back, and forget the exact numbers, but the were within a few pounds each, and I believe in the mid 160's.
The car is significantly modified with bolt-ons (previous owner) MSD ignition coil, cold air intake, headers, exhaust, suspension, carbon fiber, etc; and I believed it was tuned by a shop, tho I dont have any information on it.
The car obviously burns oil sometimes, but it doesnt appear to burn it consistently and usually only after deceleration as I heavily rely on engine compression for speed control. Id say I put in a quart (maybe two) between my 3,000 mile oil changes.. The car is driven daily but usually only for short trips..It was a daily commuter for quite a while, previously.
I am a DIY mechanic, so far with multiple clutches, timing belts, water pumps, suspension, gaskets, and even a manual trans partial rebuild--input and output shaft bearings and synchro on third gear in my 94 accord...and much more; Im seasoned but not professionally trained.
The thing is, I want (and hopefully can) do this myself, but I need your expert guidance as to what is most likely the problem so I dont throw time and money fixing the wrong things.
Thank you SO much for taking the time to respond.
Much love, Dustin Silva.
Swapping out the PCV did not fix the problem.. I continued to drive the car for several weeks, still smoked.
Interesting turn of events tho: my car ended up smoking really bad and the dumping all its oil onto my driveway. Quick Google search turned up the culprit: Oil Cooler o-ring. I pulled the filter, and the oil-cooler, replacing the O-ring and torquing everything to spec 30mm nut to 54ftlbs, filled the car and NO MORE SMOKING on acceleration after an extended deceleration...I have no idea how this solved the problem, but Im nearly a week into driving with the new oil cooler o-ring and Ive done a bunch of decels, with mo smoke at all..
Super stoked; this has bugged me for nearly seven years.
@dustinsilva
That's great news to hear! Glad you figured out the problem.
I suspect your pcv us stuck and causing this problem.
I checked the pcv today and it appeared to be functioning correctly, but I replaced it anyway; I will report back after I drive it more.