Search found 64 matches

by RandyM
Sat Oct 27, 2018 1:21 pm
Forum: Tech Forum
Topic: starts - won't run unless key held
Replies: 8
Views: 626

Re: starts - won't run unless key held

Your photo doesn't appear. Sounds like fuel pump is not getting power in run mode. Maybe this is what you're looking for: https://www.realoem.com/bmw/enUS/showparts?id=3997-USA---E12-BMW-528i&diagId=32_0499 When I had a similar problem I replaced the wire harness, #2 in diagram, did not solve proble...
by RandyM
Mon Mar 20, 2017 10:41 am
Forum: Tech Forum
Topic: Spark plug boots
Replies: 2
Views: 347

Spark plug boots

Hi all, I have the black spark plug boots, not sure about the origin, they click on the plug end but still seem a bit wiggly, floppy. I'm replacing my wires and wondering if i should get the whole works, with ends (the red ones are OEM, correct), or just wire and re-use the ends? Also just purchased...
by RandyM
Mon Dec 26, 2016 3:14 pm
Forum: Tech Forum
Topic: Fuel leak at cold start valve
Replies: 8
Views: 571

When the engine is cold, pop the hood and start. The leak location should be obvious. My cold start valve was leaking where the plastic and metal parts are joined. A generous dollop of 5 minute epoxy solved the problem. Note that I am a total cheapskate and a new valve is a far better and safer solu...
by RandyM
Sat Dec 17, 2016 1:52 am
Forum: Tech Forum
Topic: fuel pressure regulator
Replies: 9
Views: 746

This topic page 2 http://www.firstfives.org/bboard/viewtopic.php?t=4239&highlight=fpr And here: http://workshopmanuals.com/bmw/5_series_e34/535i_m30_sal/2_repair_instructions/13__fuel_system_(m30)/31__fuel_pump_with_drive_and_line/1_ra__notes_on_fuel_pressure_check_(reference_pressure__intake_manifo...
by RandyM
Sun Dec 11, 2016 8:27 pm
Forum: Tech Forum
Topic: fuel pressure regulator
Replies: 9
Views: 746

The return side is non pressurized; just acts as an open drain line from FPR to tank. Sounds like the check valve in your pump is not functioning. Maybe that's also related to your pressure previously being below spec. Try tapping on the pump while off and then while running. That miraculously cured...
by RandyM
Sat Dec 10, 2016 4:49 pm
Forum: Tech Forum
Topic: Coil Replace?
Replies: 6
Views: 608

Some prefer the blue vs. black ;-)
by RandyM
Sun Dec 04, 2016 10:14 pm
Forum: Tech Forum
Topic: fuel pressure regulator
Replies: 9
Views: 746

Pressure should stay up. 32 psi is low, should be about 44 psi iirc. Did the new regulator fix that? Where are you measuring pressure? Are you sure gauge is accurate? Clamping technique might be less secure than u think. You didn't give result of clamping supply side in your post. Have you checked A...
by RandyM
Sun Oct 23, 2016 2:19 pm
Forum: Tech Forum
Topic: Slow to fire up.
Replies: 6
Views: 762

Pressure:3bar or 43 psi Make sure the gauge is rated for gas With key on, engine off, pump should Turn on and supply full pressure. With key off, wait an hour or more annd recheck pressure; should hold. If not, you have a leak in lines or in pressure regulator. Check for wet spots, most likely at co...
by RandyM
Mon Oct 17, 2016 12:40 pm
Forum: Tech Forum
Topic: Slow to fire up.
Replies: 6
Views: 762

Ditto what Mike wrote. Get a pressure gage at the hardware store along with a 5/16 barbed adapter. Take the line off the cold start valve and plug it in there temporarily. Make sure to use a hose clamp.Crank the engine and watch the gauge. Careful when you detach the line because fuel will probably ...
by RandyM
Thu Oct 13, 2016 6:54 pm
Forum: Tech Forum
Topic: Suspension and steering refresh question
Replies: 3
Views: 641

Ditto what Mike wrote. Check the rubber bits which are probably dry, hard, and shrunken or worn, and bearings i.e. control arm ends. I'm quite satisfied with the Turner urethane end links I installed and one of my control arm bearings was beyond crusty.
by RandyM
Thu Oct 13, 2016 11:25 am
Forum: Tech Forum
Topic: 81 528i replaced starter, now engine cranks but won't run
Replies: 9
Views: 931

Sounds like you're on the right track. Bad combo relay? Ignition switch? When you disengage starter does it seem like it runs out of fuel(pump shutdown) or immediately quits, (ignition related) Does the fuel pump turn on when key is turned on? ....starts easily with fuel immediately present? If so I...
by RandyM
Wed Oct 05, 2016 9:21 am
Forum: Tech Forum
Topic: Gas Tank Problem 530i 1976
Replies: 5
Views: 721

I also had the occasional gassy trunk which I avoided by not filling all the way, seemed to be solved with new fuel line, one of which had turned to mush at the tank connection. Still suspected the evap lines/ tank. I've looked behind the side partition in the trunk but had no success accessing. Doe...
by RandyM
Tue Sep 13, 2016 10:32 am
Forum: Tech Forum
Topic: Hood release cable routing...76 530i
Replies: 2
Views: 444

on my 81 its at the top left of the headlight cover opening, the cover has a flat portion 'missing" where the cable enters and passes right above the headlight adjuster.

https://www.bmwtechinfo.com/repair/main ... 057647.jpg
second image on left u can see it
by RandyM
Wed Aug 17, 2016 4:25 pm
Forum: Tech Forum
Topic: Erratic idle
Replies: 3
Views: 660

Check and lube all throttle mechanical linkages, look for play in pivots on throttle body. Is your cold idle mechanism in good shape, done the refrigerator test? test. Dipstick seal good? Clean throttle body per faq?
by RandyM
Fri Jul 29, 2016 11:05 pm
Forum: Tech Forum
Topic: Buzzer noise- blower motor?
Replies: 6
Views: 764

I'd be looking at something other than the blower since the problem is the same if fan is off/on/low/high. you could pull the fuse and what happens. Does it happen at rest or only when moving? Does turning the climate control to off affect it? The pivot on my accelerator pedal sometimes buzzes cause...