Injectors getting sent a bad signal

[DoBronx]

So on my 318i (M42) i was having a issue where my car would start and than instantly die, after checking fuel pressure at the rail i have over 40PSI of pressure, and after looking at the connection with a noid light i can see cylinders 2 and 4 are not running right, and when plugged in, (this is hard for me to explain), sometimes (about %70 of the time) Cylinders 1,2,3 would fire, and for the other 30 cylinders 1,3,4 would fire, but not all cylinders at the same time, Could this be a DME issue, or a wire harness issue? Or even a bad ground?

[DoBronx]

So on my 318i (M42) i was having a issue where my car would start and than instantly die, after checking fuel pressure at the rail i have over 40PSI of pressure, and after looking at the connection with a noid light i can see cylinders 2 and 4 are not running right, and when plugged in, (this is hard for me to explain), sometimes (about %70 of the time) Cylinders 1,2,3 would fire, and for the other 30 cylinders 1,3,4 would fire, but not all cylinders at the same time, Could this be a DME issue, or a wire harness issue? Or even a bad ground?

[shogun]

Do NOT post questions in the E36 DIY forum, that is for completed instructions for DIY. Questions post in the normal E36 forum, thread moved from E36 Common Problems and DIY Fixes and both posts in different forums merged

[Eric93se]

Measure the resistance, they should be close to one another. Do not buy new China injectors from eBay, they will leak.

On the older e36's the fuel pressure regulator can't handle ethanol in the fuel so it goes bad, replace the vacuum line as well.

If you get injectors check Rockauto, cheap enough to replace all 4.

- - - Updated - - -

You could also try and put 2 cans of royal purple atomizer and drive it.

- - - Updated - - -

There is also a part change at 1/94, so check your cars build date on the b-pillar.

[bluptgm3]

Go to realOEM.com, insert the last seven characters of the VIN. Look thru the diagrams for required part numbers.

FYI - the E36 is in the ‘Classic’ catalog.

[DoBronx]

Measure the resistance, they should be close to one another. Do not buy new China injectors from eBay, they will leak.

On the older e36's the fuel pressure regulator can't handle ethanol in the fuel so it goes bad, replace the vacuum line as well.

If you get injectors check Rockauto, cheap enough to replace all 4.

- - - Updated - - -

You could also try and put 2 cans of royal purple atomizer and drive it.

- - - Updated - - -

There is also a part change at 1/94, so check your cars build date on the b-pillar.


So the injectors are fine, when i put the injector from 1 to 4, cylinder 1s injector works fine and 4 is still acting up

[Eric93se]

You can clean out your DME with Deoxit 5% and an old toothbrush. Get access to both sides of the board and spray everything and lightly scrub, repeat 2x. It has to be 1000% dry before installing.

[gc325is]

Some BMW have bad Injector transistors. The FET drivers can burn up inside the DME.