1988 325I No start problem - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 01-18-2009, 11:11 AM
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1988 325I No start problem

I'm pretty new to BMW's & my 528e was a great car, but i'm having problems with the 325i. It had a dead battery, we jump started it & it ran fine, the idle jumped up & down from 1000 rpms to about 1800 rpms at idle, but it ran. we replaced the battery & now it just cranks. No start at all. won't even start on starting fluid. We changed the spark plugs & the coil. still won't start. when you turn on the key the coil makes a small spark, but when cranking the engine over it makes no spark at all. The car is an automatic with 135k miles. Any ideas? I'm ok mechanically but not a bmw tech. haha.
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#2 (permalink) Old 01-18-2009, 11:53 AM
OMFG another one!?
 
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Have a look at the fuel pump and fuse. Might wanna have a look at the distributor and plug wires.

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#3 (permalink) Old 01-18-2009, 11:58 AM
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check your fuses 1st, after that still no spark, camshaft sensor.

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#4 (permalink) Old 01-18-2009, 02:02 PM
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We've checked the fuses. if it was fuel related, wouldn't it still try to fire with starting fluid? plug wires seem good, cap looks good. we drove it just a couple days ago. May have to try the cam sensor. Does the computer control spark on these or is it just coil, cap, & rotor? Thank you for all the help!
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#5 (permalink) Old 01-18-2009, 10:36 PM
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how can it jump down to 1800 from 1000 RPM?
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#6 (permalink) Old 01-19-2009, 08:48 AM
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the idle jumps up & down from 1000-1800 RPMS
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#7 (permalink) Old 01-19-2009, 11:51 AM
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Take a read of this:

1985 325e intermittent starting, no spark - bimmerfest - BMW Forums

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#8 (permalink) Old 01-19-2009, 12:41 PM
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Thank you. I'll try that tonight after I get off work, if that doesn't do it then I guess the cam sensor is my next stop.
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#9 (permalink) Old 01-19-2009, 07:35 PM
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fuel pressure regulator is shot.....the engine will hunt for idle and won't find it cause there's probably something like 110 PSI going through..... plus it floods the engine and makes the plugs fouled, leading to a non-spark conclusion....I'd go with the fuel pressure myself, not lacking...too much...good luck
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#10 (permalink) Old 01-19-2009, 07:55 PM
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if not that then the idle control valve is shot or needs cleaning...the idle control valve can do that....but won't keep the engine from starting....this is not hard to figure out....I would say that if it was all (fuel pressure regulator, idle control valve and even the controller
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#11 (permalink) Old 01-20-2009, 03:28 PM
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fuel pump?
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#12 (permalink) Old 01-21-2009, 09:34 AM
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we've got the little black box out & gonna try resoldering the connection, if that doesn't work then we'll move on to next step. Thanks everybody.
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#13 (permalink) Old 01-22-2009, 08:04 PM
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I would also try taking the idle control out and cleaning it with rubbing alcohol. before doing that cleaning thing though i would try to blow though the idle control valve (not pleasant, wipe the nozzles off) and see if it moves by that method. if it does the valve would not appear to be frozen. if it doesn't then proceed .... good luck....
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