On the DB37 connector, Pins 32 & 33 are for Injector Bank "A" and 34 & 35 are for Injector Bank "B". I have no problem with this.
My question is, are both pins 32 AND 33 required for driving an injector on Bank "A" or would the injector(s) fire( just fine if only the wire from pin 33 was connected (as opposed to both 32 AND 33).
I ask because a friend is diagnosing a rough running issue and does not have continuity to pin 32 from the injector plug, but DOES have continuity to pin 33.
Injector Driver Question, Must pins 32+33 be connected
Moderators: jsmcortina, muythaibxr
Injector Driver Question, Must pins 32+33 be connected
1991 BMW 325i
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Re: Injector Driver Question, Must pins 32+33 be connected
Those pins are connected together internal to the MS, on the mainboard; two pins for each injector output to lessen current on each pin. However, one pin should be enough, I doubt that is your problem.
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Re: Injector Driver Question, Must pins 32+33 be connected
I wholeheartedly concur.billr wrote:However, one pin should be enough, I doubt that is your problem.
Just to add to the discussion, I would be looking very closely at the soldering related to that pin (at the DB 37).
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
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MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
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Re: Injector Driver Question, Must pins 32+33 be connected
I am the friend that mooney is referring to. I found that the wire going into pin 32 on the db37 connector has popped out, which is why I am not getting continuity on that pin. I will need to extract the pin from the connector, recrimp it onto the wire (or get new pin) and reinsert it into the connector. I am hoping this solves some of my issues.