To long cranking before fires up

Asked by Jun 12, 2014 at 02:59 PM about the 1995 BMW 5 Series

Question type: Maintenance & Repair

I have an E34 520i , 24 valves vanos , when the engine is cold it cranks to long till fires
up, but when engine reached the function temperature it fires up right away, no mater the
outside temperature, but even if cranks long after it starts the angine runs good idlle is
good only at accelerations until it warms up the engine holds back like no power , but
after it warms up runs like a dream, please gibe me a hint? Engine check shows code 79
and tells crankshaft sensor or oxigen sensor!,,,,,,, wat could it be?   Thanks

2 Answers

795

Change the offending crankshaft sensor and O2 sensor and test drive. Maybe check distributor(unless fuel injected-check injectors and spark plugs and ignition coils. Could be fuel delivery related too. Sorry I'm an E39 guy. good luck though.

1 out of 1 people think this is helpful.
10

I have an e39 with this issue. On cold start (overnight) it cranks for a couple seconds too long.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search BMW 5 Series Questions

BMW 5 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 2,020
#2 Michael Branan
Michael Branan
Reputation 780
#3 Robert Charlson
Robert Charlson
Reputation 680
View All

Related Models For Sale

Used BMW 3 Series
966 Great Deals out of 33,690 listings starting at $1,000
Used BMW 7 Series
196 Great Deals out of 6,107 listings starting at $2,999
Used Mercedes-Benz E-Class
371 Great Deals out of 21,760 listings starting at $699
Used Mercedes-Benz C-Class
480 Great Deals out of 28,810 listings starting at $1,499
Used Audi A6
138 Great Deals out of 6,552 listings starting at $999
Used BMW M3
40 Great Deals out of 1,702 listings starting at $4,544
Used Mercedes-Benz S-Class
148 Great Deals out of 6,608 listings starting at $1,200
Used Audi A4
184 Great Deals out of 10,891 listings starting at $700
Used Honda Accord
789 Great Deals out of 88,192 listings starting at $1,150

Used Cars For Sale

2018 BMW 5 Series For Sale
54 listings starting at $52,695
2017 BMW 5 Series For Sale
2,924 listings starting at $51,212
2016 BMW 5 Series For Sale
37 Great Deals out of 1,160 listings starting at $29,991
2015 BMW 5 Series For Sale
11 Great Deals out of 344 listings starting at $22,997
2014 BMW 5 Series For Sale
216 Great Deals out of 3,810 listings starting at $15,997