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Classic Bimmers
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  #1  
Old 02-22-2011, 06:28 AM
bgbeemer bgbeemer is offline
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Location: SC
 
Join Date: Sep 2010
Posts: 13
Mein Auto: 1988 735i
88 735i turns over won't start

I am at the end of my rope! after working to get this car street ready (brakes, window motors, drive shaft, water pump, fan clutch new a/c compressor, Bosch spark plugs, new wires, cap & rotor, new coil,new crankshaft position sensor, new oil & filter)) The car was running great and then out of no where it stalls out.
I can not get it to start. it cranks over and if I crank it long enough it sounds like it will almost start. There is fuel delivery and I pull a spark plug and it is getting spark. But when I pulled out all the spark plug they were soaked with fuel. They have only 200 miles on them. I blew off all the plugs and put back in and cranked the engine and no start. When I took out the plugs again they were soaked with fuel. It looks like the engine is getting flooded with fuel to the point I had to change the oil because it smell like fuel. I didn't want to ruin the starter so I haven't tried it again in fear it will fry the starter. The fuel filter is new but I am learning as I go here with this car so any help will be greatly appreciated.
The car has 180000 miles on it so I am assuming everything else is original on engine
HELP HELP HELP

Last edited by bgbeemer; 02-22-2011 at 08:02 AM.
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  #2  
Old 02-22-2011, 06:43 AM
***CCCP***'s Avatar
***CCCP*** ***CCCP*** is offline
Major
Location: Canada Calgary
 
Join Date: Aug 2010
Posts: 2,323
Mein Auto: 745 li
Quote:
Originally Posted by bgbeemer View Post
I am at the end of my rope! after working to get this car street ready (brakes, window motors, drive shaft, water pump, fan clutch new a/c compressor, Bosch spark plugs, new wires, cap & rotor, new coil,new crankshaft position sensor, new oil & filter)) The car was running great and then out of no where it stalls out.
I can not get it to start. it cranks over and if I crank it long enough it sounds like it will almost start. So it must be getting spark. I didn't want to ruin the starter so I haven't tried it again in fear it will fry the starter. I thinking a fuel problem. The fuel filter is new but I am learning as I go here with this car so any help will be greatly appreciated.
The car has 180000 miles on it so I am assuming everything else is original on engine
HELP HELP HELP
When u turn ur keys and all the lights light up can u hear a fuel pump working? Not sure where it's located on the older 7 but usually u can hear it pumping from under the rear seat. 180000 miles and if it's original that's probably it too old and it's dead now so look into that I'm pretty sure that's ur fuel pump. Plus u said it was almost starting. That was probably one last breath of it. P.S when replacing make sure ur fuel gauge works properly. I had that problem with my old Audi back in a day 1989 Audi 5000 cd I didn't install the fuel pump correctly so my fuel gauge was always showing full
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  #3  
Old 02-22-2011, 07:14 AM
bgbeemer bgbeemer is offline
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Location: SC
 
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Mein Auto: 1988 735i
Thanks for the input but I started checking the fuel delivery and it is definitely getting fuel and it appears the engine is flooded I am learning as I go but what controls the fuel to the injectors. I took out the plugs and blew them dry and put back in and cranked the engine. took out the sames plugs and they look like they were sitting in fuel and I mean soaked. I took out spark number one and cranked the engine and got a good spark.

Last edited by bgbeemer; 02-22-2011 at 07:16 AM.
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  #4  
Old 02-22-2011, 07:31 AM
***CCCP***'s Avatar
***CCCP*** ***CCCP*** is offline
Major
Location: Canada Calgary
 
Join Date: Aug 2010
Posts: 2,323
Mein Auto: 745 li
Quote:
Originally Posted by bgbeemer View Post
Thanks for the input but I started checking the fuel delivery and it is definitely getting fuel and it appears the engine is flooded I am learning as I go but what controls the fuel to the injectors. I took out the plugs and blew them dry and put back in and cranked the engine. took out the sames plugs and they look like they were sitting in fuel and I mean soaked. I took out spark number one and cranked the engine and got a good spark.
Well I hope all ur effort will pay off in the end and u will get that car up and running. And I hope it won't give u a lot of headache. I had a lot of problems with that 89 Audi I had it was my 1st car. I couldn't take it anymore problem after problem - sold it.
Put some pictures of ur ride.
Plus try to put this post in e38/ e65/e66 forum we have a lot of smart guys that can help and they know a lot bout cars so they might be able to help
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  #5  
Old 02-23-2011, 06:41 AM
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Andrew*Debbie Andrew*Debbie is offline
resU deretsigeR
Location: Anglesey
 
Join Date: Jul 2004
Posts: 6,243
Mein Auto: Leaf Tekna
Sounds like too much fuel or not enough air.


Do you have a way to check for fault codes?

Doubt its the injectors -- they wouldn't all go at the same time. But maybe they open too long.
Fuel pressure regulator.
Idle control valve.
Position Sensors?
Coolant temp sensor (less likely)

Last edited by Andrew*Debbie; 02-23-2011 at 06:43 AM.
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  #6  
Old 02-23-2011, 11:56 AM
bgbeemer bgbeemer is offline
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Location: SC
 
Join Date: Sep 2010
Posts: 13
Mein Auto: 1988 735i
Thanks Andrew I have no way of getting codes the dash led is so faint I cant read. New crank position sensor just put on 200 miles ago. Replaced the fuel regulator and still the same problem, appears to be still flooded
I changed the fuel regulator and even put in new plugs again. Frustrated!!!!!!!!!!
Is there another position sensor besides the one I replaced at the front of the engine?

Last edited by bgbeemer; 02-24-2011 at 07:35 PM.
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  #7  
Old 03-01-2011, 02:16 PM
Jrvna Jrvna is offline
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Location: Temecula CA
 
Join Date: May 2010
Posts: 10
Mein Auto: 1984 633csi
Hey, I have a 633csi. It did the same thing, Mine had a relay problem. Next to the fuse box under the hood, there are 2 relays. The one closer to the fire wall was bad. we replaced it, with a bosh. because the car was old NAPA auto parts matched it to a newer relay and that fixed the problem. Also under the starter there is a sensor that also went bad, and the symptoms of that were very similar, to what you are describing. Hope it helps!!
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  #8  
Old 03-17-2011, 05:57 AM
88_735I 88_735I is offline
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Location: Trail MN
 
Join Date: Mar 2011
Posts: 1
Mein Auto: 1988 735i
Thank you Jrvan

I also have a 1988 735i thats doing the same thing as bgbeemers car, But theres times where it will run, and then theres time where as soon as you touch the gas, she dies. also when it is running its so rich I dont dare keep it running, and the fuel pump is working, shes just getting way to much fuel, If i pump the hell outta the foot feet she trys to start but cannot maintain a constant idle. Plz let me knoow if this is what was goin on with you BMW because I love my car but my wife is sayin either fix it or sell it and there are now shops in my area that will touch it. Thanks 88_735i, also after talking to a BMW MEchanic he suggests that it may be the vein style MAF sensor located in the air supply, Does anybody know if that could cause these symptoms and sorry about mis spelling your name Jrvna.

Last edited by 88_735I; 03-17-2011 at 07:29 AM. Reason: Possibly found out further info. wante to post ot see if true or not
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  #9  
Old 04-13-2011, 06:56 PM
terrievann terrievann is offline
E30
Location: ATLANTA
 
Join Date: Nov 2010
Posts: 41
Mein Auto: 87 325e@06 330i
Yes and check for cracks in air bonnet that takes air from outside to engine>.
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  #10  
Old 04-14-2011, 07:35 AM
Jrvna Jrvna is offline
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Location: Temecula CA
 
Join Date: May 2010
Posts: 10
Mein Auto: 1984 633csi
Well, Everything I have learned on my 633 has been trial an error and Yes a bit expensive. But these are great cars. Directly below my throttle body. there is a Idle control valve. this also controls the amount of air into the chamber. Here is how i tested mine. There is a screw on the top that you can control the amount of air. If you end up moving it and it does not control or change anything. Carefully remove the screw and try to cap it with your finger. If the car starts up replace that part. it runs for about 120 at NAPA auto parts. Remember my car is a 1984 model 633. I know that the 1988 635 models are different. I am not a mechanic, just some body that has gone thru a lot of fun times and i have success fully have had my car running. I drive my car every day to work a 120 mile round trip every day of the week. I have recently up graded my differential to a M6 model. I hope you can make it to the beemmer fest this year. its a good ego booster or a very humble experience in my case after you see some real cool machines.LOL.....Well hope it helps....

Last edited by Jrvna; 04-14-2011 at 07:37 AM.
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  #11  
Old 07-19-2011, 05:56 AM
ernesto50 ernesto50 is offline
classic
Location: nashua n.h.
 
Join Date: Jul 2011
Posts: 4
Mein Auto: 1985 735i bmw
I have a 1985 735i it seems it might have fuel but the pressure not correct. i just had same problem. discover there two fuel pumps. the main one is underneath left axle thats main one easy to get and replace. this pump is for sale on ebay for 46 bucks. pretty sure thats the problem.
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  #12  
Old 06-15-2012, 09:01 AM
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alpinaman24 alpinaman24 is offline
what amg?
Location: San fern valley
 
Join Date: Feb 2012
Posts: 398
Mein Auto: 07 B7,91 735i , 91e30sold
yea seriously ..

check fuel pressure ..

pumps under rear seats ..

if you didnt put a gauge to check fuel pressure do NOT ruel the pump out
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  #13  
Old 07-07-2012, 11:00 AM
brianj29168 brianj29168 is offline
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Location: Statesville, NC
 
Join Date: Jul 2012
Posts: 3
Mein Auto: 1981 BMW 745I Turbo
Unplug Your Computer for and Electrical Reset

My 1981 745I did the same thing. Unplug the computer and wait about a minute before plugging it back in. The computer in my car was located under the dash on the passengers side behind the speaker. It is a black box with a wiring harness going to it. These cars seem to have electrical hiccups from time to time and unplugging the computer worked for me. If that does not work I would start checking the electrical relays under the hood and dash.
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  #14  
Old 08-19-2012, 05:44 AM
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BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 1,908
Mein Auto: E23;E30;E38;E32;E34 +
Check fuel rail pressure and for a weak coil. If it sparks and is running the injectors I doubt its the cps units (there are two that can can easily be checked with a multi-meter) .
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  #15  
Old 08-28-2012, 09:16 PM
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BMWFatherFigure BMWFatherFigure is offline
Old School
Location: Perth, Western Australia
 
Join Date: Aug 2012
Posts: 1,908
Mein Auto: E23;E30;E38;E32;E34 +
The timing is not adjustable on that engine but you can put the plug leads in wrong. Have you checked both CPS's? Change the oil, charge the battery and try again!! Is this E23 or E32?

Last edited by BMWFatherFigure; 08-29-2012 at 12:23 AM.
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  #16  
Old 11-10-2013, 07:32 PM
drkpsyco drkpsyco is offline
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Location: Florida
 
Join Date: Nov 2013
Posts: 3
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Mein Auto: 92 bmw 735i
fuel pressure regulator has been my prob twice i drive a 92 735i dayly that would be my first got to then the pump since 9 times out of 10 ppl dont keep enough gas in the vehicle which royaly srews these components to mess up due to them bieng under pressure
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  #17  
Old 12-25-2013, 03:41 PM
Jorge554 Jorge554 is offline
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Location: Calexico,CA
 
Join Date: Aug 2013
Posts: 60
Mein Auto: 2003 BMW 745LI
1985 735i BMW NOISE?

Just bought this 1985 735I BMW for $500 bucks and it has this noise what could it be thanks guys.

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  #18  
Old 04-14-2014, 10:39 AM
Rouge_cm Rouge_cm is offline
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Location: California
 
Join Date: Feb 2014
Posts: 7
Mein Auto: 1987 bmw 635CSi
[QUOTE=Jorge554;8035958]Just bought this 1985 735I BMW for $500 bucks and it has this noise what could it be thanks guys.

[/QU

your belts need be replaced and it needs a valve adjustment
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  #19  
Old 04-15-2014, 12:18 AM
Jorge554 Jorge554 is offline
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Location: Calexico,CA
 
Join Date: Aug 2013
Posts: 60
Mein Auto: 2003 BMW 745LI
Bmw 735i e23 wont start

1985 BMW 735I WONT TURN ON THERE SEEMS TO BE NO CURRENT GOING TO THE SPARK PLUGS NEW TO THIS CAR WHAT COULD IT BE?

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