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Old 10-22-2024, 11:25 AM   #1
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Smoke Test result's

Ok..I did a smoke test on my 2002 boxster, the inlet I used was the AOS Y line ( small one ),after the throttle body, the only smoke I seen was coming out of my Driver side air intake,..Why would this happen,..Thank's Frank

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Old 10-23-2024, 03:10 AM   #2
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Where else were you expecting to see it? What you describe sounds correct, to me.
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Old 10-23-2024, 09:35 AM   #3
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Oh..Ok,.I thought it could not pass thru the throttle body,So if that is the only area that I see smoke,Is my entire engine vacuum leak free, Or are there other system's to ck...? this is where I connected the hose,... Thank's tcoradeschi, Frank
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Old 10-24-2024, 03:23 AM   #4
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I’d say that your intake tract appears to be vacuum leak free. Is there a specific problem you are trying to solve, here?
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Old 10-25-2024, 08:00 AM   #5
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I keep getting the 1128,1130 codes..and the engine light comes on after about a Hr of driving, so trying to figure out why,..and vacuum leak's seemed to be the common issue,..I do have a new MAF,..but wanted to ck everything Iam suppose to B4 I install it,..I will ck under the car today...if no smoke then , I will install the MAF. Thank's Frank

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Old 10-25-2024, 09:19 AM   #6
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If you have 2.7 or 3.2 engine (I did not see that info here), then very common vacuum leak is the furthermost intake crosspipe's vacuum flap axle-connection to the intake crosspipe. That axle has rubber seals and those leak pretty much for sure after 20 years.
Some reason those often do not emit smoke on the smoke test when air (smoke in this case) is tried to push out from the intake. When the air is going in to the intake runner on normal engine operation vacuum, the leak is very much evident - at least on my car and couple of my friends M96 based on engine running much better (my car) and my friends car stopped showing those same CEL codes.
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Old 10-25-2024, 10:17 AM   #7
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Hi Pilot4fn,..Thk's it's a 02' 2.7 5 spd 96 K miles,..I
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Old 10-29-2024, 08:55 AM   #8
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Well my latest smoke test down the dip stick tube,..I had smoke coming out of 2 spark plug's 1 really heavy, the 2nd didn't seem like much..1 coil pack missing a bolt the other one was bolted in tight,..so obviously I have loose plug's..? right, or is it that the coil's are not tight enough ? or probably both ? ( passenger side ) Thank's Frank
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Old 10-29-2024, 09:07 AM   #9
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Quote:
Originally Posted by flmont View Post
Well my latest smoke test down the dip stick tube,..I had smoke coming out of 2 spark plug's 1 really heavy, the 2nd didn't seem like much..1 coil pack missing a bolt the other one was bolted in tight,..so obviously I have loose plug's..? right, or is it that the coil's are not tight enough ? or probably both ? ( passenger side ) Thank's Frank
Or you have blown out the oil seal Orings on the plug tubes............
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Old 10-29-2024, 09:22 AM   #10
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Oh Rat's...Thank's JFP,..Frank
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Old 11-06-2024, 10:11 PM   #11
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Here is yet another issue when it's cold out 35-45 Deg's and a little damp after some rain the 1st start of the car the engine shake's, it has very low RPM,..it pop's and kinda backfire's, and just terrible rough running, turn it off, and the 2nd start is much, much better RPM even's out a lot, and much less shaking and poping, run's pretty decent, and once warmed up, it run's great ?? Thank's Frank
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Old 12-12-2024, 02:01 PM   #12
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Update : You were right JFP, I did all of my Tubes with new one's,..and no more smoke and it start's and idles Great, So far 120 miles no light..Thank's ! Frank

P.S. Large O ring's were flatted out.
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Old 12-12-2024, 02:12 PM   #13
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Originally Posted by flmont View Post
Update : You were right JFP, I did all of my Tubes with new one's,..and no more smoke and it start's and idles Great, So far 120 miles no light..Thank's ! Frank

P.S. Large O ring's were flatted out.
.......................

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