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Search: Keyword(s): ; Posts Made By: Tecmec
Forum: E28 (1982 - 1988) 04-26-2012, 03:47 PM
Replies: 3
Views: 1,366
Posted By Tecmec
1987 535 is ECM

Thanks for the link. If I understand the following table that accompanied the advertisement for repair,
BMW 535i 1985-1988
BMW 535is 1988
BMW 635CSi 1985-1987
BMW 735i 1985-1987
BMW L6 1987...
Forum: E28 (1982 - 1988) 04-20-2012, 11:07 AM
Replies: 3
Views: 1,366
Posted By Tecmec
1987 535 is ECM

I have a February 1987 manufacture date 535 is with the Moronic I ECM. Bosch P/N 0 261 200 059. Also marked 1 705 619 9. The unit is a 35 pin unit. I have determined that the ECM is bad (may...
Forum: E28 (1982 - 1988) 09-08-2011, 05:20 PM
Replies: 0
Views: 886
Posted By Tecmec
B/C Horn Diode and Board Computer Horn

On the 1987 535i (pre March 1987 manufacture date) there are items called B/C Horn Diode and Board Computer Horn. Both are located beneath a plate just to the rear of the battery on the left side...
Forum: E28 (1982 - 1988) 09-07-2011, 04:47 PM
Replies: 53
Views: 5,577
Posted By Tecmec
Have to think about the differential mount more,...

Have to think about the differential mount more, but I would not see that as related. I would have to know more of what they did and exactly what mount you are talking about. You state that you...
Forum: E28 (1982 - 1988) 09-04-2011, 04:38 PM
Replies: 53
Views: 5,577
Posted By Tecmec
To recap, I believe we are back to having spark...

To recap, I believe we are back to having spark but no fuel delivery. Is that the case. I am beginning to feel I am hindering you more than helping you. I know I have myself confused at this...
Forum: E28 (1982 - 1988) 08-26-2011, 07:48 AM
Replies: 53
Views: 5,577
Posted By Tecmec
Thanks for the correction. I know the 533i and...

Thanks for the correction. I know the 533i and 535i have the chain. I assumed the 528 did as well and you know how that goes. 50/50 chance and I was wrong. That is why I do not gamble. Have a...
Forum: E28 (1982 - 1988) 08-25-2011, 01:18 PM
Replies: 53
Views: 5,577
Posted By Tecmec
I am not surprised by the no spark. I was...

I am not surprised by the no spark. I was thinking earlier that the fuel pump if not the real issue was the lessor of evils at best, when you did not get any sputter when you used starter fluid. ...
Forum: E28 (1982 - 1988) 08-24-2011, 09:38 PM
Replies: 53
Views: 5,577
Posted By Tecmec
Confused by your reference to ECU pin when...

Confused by your reference to ECU pin when referring to C250. Both C250 and G301 are located under the rear seat. C250 in the center and G301 on the left side. To check G301 disconnect it from the...
Forum: E28 (1982 - 1988) 08-19-2011, 06:29 AM
Replies: 53
Views: 5,577
Posted By Tecmec
OK. We need to recap here a bit. It is unclear...

OK. We need to recap here a bit. It is unclear to me if we eliminated any issue with fuse #1. I might have incorrectly referred to it as fuse #16 earlier. But fuse #1 is after the main and fuel...
Forum: E28 (1982 - 1988) 08-17-2011, 07:55 PM
Replies: 53
Views: 5,577
Posted By Tecmec
I would not be ready to point the finger at the...

I would not be ready to point the finger at the ECU yet. You most likely are, but lets make sure we are reading out the ECU connector correctly. Looking at the connector, the top row is the one...
Forum: E28 (1982 - 1988) 08-16-2011, 09:56 PM
Replies: 53
Views: 5,577
Posted By Tecmec
OK. Let me restate some of this. You should...

OK. Let me restate some of this. You should have battery voltage with ignition off between pin 18 and ground. You should have battery voltage with ignition on between pin 27 and ground. You...
Forum: E28 (1982 - 1988) 08-15-2011, 12:48 PM
Replies: 53
Views: 5,577
Posted By Tecmec
Engine Control Unit ECU

Sorry, I am confused. I expected you had a 35 pin Motronics connector which represents the basic Motronics system and was used on the 528 up through March 1987 or the 55 pin Motronics connector...
Forum: E28 (1982 - 1988) 08-15-2011, 12:32 PM
Replies: 53
Views: 5,577
Posted By Tecmec
That light is driven strickly from a switch...

That light is driven strickly from a switch located in the fuel tank sender which closes at about 1.5 gallons. The problem could be a bad or stuck switch or a VDO problem. You might be advised to...
Forum: E28 (1982 - 1988) 08-14-2011, 08:24 PM
Replies: 53
Views: 5,577
Posted By Tecmec
Looking at your garage listing I probably led you...

Looking at your garage listing I probably led you wrong in my earlier posting about the Motronics Control Unit (MCU). I now assume you have the larger diagnostic connector and the 55 pin MCU...
Forum: E28 (1982 - 1988) 08-14-2011, 07:27 PM
Replies: 53
Views: 5,577
Posted By Tecmec
There is no "Kill Switch". The fuel pump relay...

There is no "Kill Switch". The fuel pump relay gets activated by a signal from the motronic control unit (MCU, on board computer) through the main relay. When the ignition switch is turned to run,...
Forum: E28 (1982 - 1988) 08-14-2011, 06:06 AM
Replies: 53
Views: 5,577
Posted By Tecmec
Both of your fuel pumps are fed from the fuel...

Both of your fuel pumps are fed from the fuel pump relay then through fuse number 1. The green and yellow wire is hot. The brown is gound. There are three connectors in the line to both pumps. ...
Forum: E28 (1982 - 1988) 08-14-2011, 05:42 AM
Replies: 3
Views: 1,127
Posted By Tecmec
You will need to remove the sending unit (the...

You will need to remove the sending unit (the four bolts on top of the pump unit) before you can remove the pump from the tank. Once the sending unit is removed you can tilt and turn the pump unit...
Forum: E28 (1982 - 1988) 08-12-2011, 05:42 PM
Replies: 1
Views: 1,088
Posted By Tecmec
535is no voltage pin 18 on motronics

Have a 1987 535is that has the basic motronics engine management control system. Vehicle after injector change and other work will not start. Have checked voltages at main relay and diagnostic...
Forum: E28 (1982 - 1988) 09-20-2010, 06:03 AM
Replies: 1
Views: 1,600
Posted By Tecmec
Reusing new intake manifold gaskets

I pulled the intake manifold on my 1987 535is to gain access to the starter, to replace it. I have reinstalled the manifold with new gaskets and tightened it. The engine has not been run or heated...
Forum: E28 (1982 - 1988) 03-08-2010, 02:54 PM
Replies: 3
Views: 1,907
Posted By Tecmec
Andy Thanks for the input. The left lower...

Andy

Thanks for the input. The left lower steering control arm is the only front end suspension part that have been swapped out. What is the story behind the rust behind the rear bumper on the...
Forum: E28 (1982 - 1988) 03-07-2010, 06:14 PM
Replies: 3
Views: 1,907
Posted By Tecmec
531is value

My apologies if this is not the correct forum for this kind of post. What is ball park values for a 87 or 88 535is, mechanically sound, minor body rust on front fender quarter panel bottoms. Minor...
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