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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 10-13-2014, 09:26 AM   #1
generaltso
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Join Date: Aug 2013
Location: lake waccamaw
Posts: 17
My Ride: 323i
Rough idle

I have codes p1188 & p1189 and a rough idle when cold. I have replaced the ccv system, new intake boots and new o2 sensors but I still get the codes. Any input would be appriciated.


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Old 10-14-2014, 08:51 AM   #2
markusmarkus
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Join Date: Jul 2008
Location: USA
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My Ride: 2001 330Ci
How many miles on the car? Does it have the original fuel pump?


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Old 10-14-2014, 11:09 AM   #3
generaltso
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My Ride: 323i
150,000 miles. I bought it with 70,000 and I've never replaced the fuel pump but before that I don't know


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Old 10-15-2014, 08:45 AM   #4
markusmarkus
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Goto autozone, O'reilly's or some other parts place and borrow a fuel pressure gauge. Remove the top cover on the engine. I think the nuts are 10mm. You'll see what appears to be a tire valve. It's not; its a Shraeder valve. Screw the gauge on to it and start the engine. It should read about 45 pounds.


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Old 10-15-2014, 04:56 PM   #5
generaltso
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Ok thanks I'll try that but, now I have codes p1250 p0173 p0170 p1188 p1189


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Old 10-21-2014, 03:12 PM   #6
Xeus
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Join Date: Oct 2010
Location: Little Rock, AR
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My Ride: 1999 BMW 323i
I used to have the same codes and I replaced the MAF. p1250, p0302 cleared. P1189, 1188, 0101 appeared for a short while then cleared. Now I have 1770 and 1747. the idle was rough before the MAF change and had recently started to go in limp mode. After I changed the MAF the idle became stable but the limp mode worsened. This car is driving me crazy!!!!!!!!!! Fking BMW!
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