 Tell me what is happening, Loud backfire and then blue gray smoke for a while |
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| dlindzey |
 Nov 24 2021, 10:59 PM
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#1
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repeat offender  Group: Members Posts: 33 Joined: 8-April 14 From: texas Member No.: 17,226 Region Association: Southwest Region  |
back story is recent acquisition 1.7 with a kit to 2.0 and possibily has glitch in distributor causing slight miss periodically at 3000 rpm and above while crusing on the hiway
everything was fine and then out of the blue puttering around town had it in second gear and very loud backfire (first time ever) and then several lesser backfires and then blue gray smoke for maybe 30-45 seconds but no further issues since episode on the drive home. not driven since but drove normally after that episode, so what gives? why the abnormal exhaust after the back fire? more evidence of distributor issue? any help understanding situation would be appreciated. |
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| falcor75 |
Nov 24 2021, 11:21 PM
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#2
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Senior Member Group: Members Posts: 1,579 Joined: 22-November 12 From: Sweden Member No.: 15,176 Region Association: Scandinavia 
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Blue / grey smoke would be the engine combusting oil, start with a compression test to rule out anything piston/valve related?
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| SirAndy |
Nov 25 2021, 12:27 AM
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#3
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Resident German Group: Admin Posts: 41,602 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(falcor75 @ Nov 24 2021, 09:21 PM)  Blue / grey smoke would be the engine combusting oil (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/idea.gif) |
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| wonkipop |
Nov 25 2021, 05:52 AM
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#4
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Advanced Member Group: Members Posts: 4,238 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille
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my squareback did that 30 years ago.
burnt valve. worn valve guides. #3 cylinder. classic type 3. |
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| Shivers |
Nov 25 2021, 06:27 AM
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#5
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Senior Member Group: Members Posts: 2,327 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
Is this a FI car, or carbs? How are the plugs? Black and sooty? Running rich with a exhaust leak can cause something similar. You said it went back to normal after, running fine. I'd check compression, and rule out the top end.
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| dlindzey |
Nov 25 2021, 08:51 AM
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#6
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repeat offender Group: Members Posts: 33 Joined: 8-April 14 From: texas Member No.: 17,226 Region Association: Southwest Region |
QUOTE(Shivers @ Nov 25 2021, 06:27 AM) Is this a FI car, or carbs? How are the plugs? Black and sooty? Running rich with a exhaust leak can cause something similar. You said it went back to normal after, running fine. I'd check compression, and rule out the top end. it is carbs |
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