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E30 M3 (1986-1991) {Euro 86-892.3L: 200hp @ 6750} {1990 2.3L Evo2/Cecotto/Ravaglia: 220/215/215hp @ 6750}
{1991 2.5L Sport Evo: 238 @ 7000} {US -- 88-91 2.3L: 196hp @ 6750, 170tq @ 4750}
Total produced: 5,280 US, ~13,300 Europe/world


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Old Tue, Mar-05-2019, 08:20:22 AM   #1
A42M3
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Default Misfiring after Engine Power Wash

Hi, I definitely need some input. I wanted to clean the engine since there was a lot of dirt down in there from over the years. I got it really clean and then tried to start. The engine started very rough even after drying the interior distributor cap. Has anyone had a similar issue with their e30 M3 and what resolve the rough idle?
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Old Thu, Mar-07-2019, 12:30:29 AM   #2
99M3Riverside
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Default Re: Misfiring after Engine Power Wash

Well, first this there are not a lot of e30 M3 guys on this forum. I would head over to s14.net. There will be more help there. There are more people on the s14.net facebook group as well. Work backwards, check plugs, wires, etc.
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Old Thu, Mar-07-2019, 05:42:51 PM   #3
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Default Re: Misfiring after Engine Power Wash

That happened to me with my old E36. It went away the next day though.
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Old Fri, Mar-08-2019, 09:14:30 PM   #4
A42M3
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Default Re: Misfiring after Engine Power Wash

Okay, thanks guys!
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Discussing Misfiring after Engine Power Wash in the E30 M3 (1986-1991) Forum - {Euro 86-892.3L: 200hp @ 6750} {1990 2.3L Evo2/Cecotto/Ravaglia: 220/215/215hp @ 6750}
{1991 2.5L Sport Evo: 238 @ 7000} {US -- 88-91 2.3L: 196hp @ 6750, 170tq @ 4750}
Total produced: 5,280 US, ~13,300 Europe/world at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)