injector #1 miss fireing

[frank1]

I was wondering if its a common issue for galant to miss on injector#1
the reson i ask is because my vr4 is all stock and it started doing that i checked all plugs and sprak plugs all seam fine
1cly# died of detonation the SP was all mashed up but no damege to piston ???

SO could this be an ecu issue?
bad injector ?

TIA

 

[Rausch]

Clogged injector?

Running lean= detonation= something is going to break.

I'm honestly not sure what the rest of your post means... /ubbthreads/images/graemlins/crazy.gif

 

[rgeier11]

The spark plug electrode should not be smashed. Check to make sure you have the proper spark plugs installed. NGK BPR6ES will be the ones you want for a factory setup.

I have had an injector misfire, I believe code 41. My problem stemmed from a bad ECU.

 

[frank1]

well i had bpr7es plugs
you mention that you had a bad ECU ? ^^^^^^ where your caps leaking ?

 

[toybreaker]

Another place for a single injector problem is at the injector resisitor pack.



The wires can break at the tab where they connect to the resistor (under the white sleeve).



The resistor itself can also go bad.

The pin can also back out of the connector where it joins the main wiring harness.

 

[rgeier11]

I'm lucky enough to live within driving distance from forum member SteveP. He took a look at my ECU and determined one of the small chips to be bad. I can look at my recipt for exact info, but he took care of me. Also, on the ECU board was a stray piece of hair that had melted itself to the board, possibly causing the problem.

 

[frank1]

Quoting toybreaker:
Another place for a single injector problem is at the injector resisitor pack.

The wires can break at the tab where they connect to the resistor (under the white sleeve).

The resistor itself can also go bad.

The pin can also back out of the connector where it joins the main wiring harness.


I wonder if a Dsm 1990 resistor pack would work on the galant ?

 

[rgeier11]

I don't think it will work. 1990's have different everything.

 

[solidviper89]

Im not sure if they work eigher, think they have more wires or somehting. Maybe someone can chime in.

 

Should work fine. According to CAPS the resistor pack for all 1G's and GVR-4's are the same.

 

[Mark LaVallee]

Nobody suggested changing the connector? OK I will. That might be your problem. I haven't killed any on the Galant, but I have on the 1G.

 

[frank1]

I checked the conector it looks fine I will look at my ECU see if anything is messs up

 

[stevep]

Quoting frank1:

I wonder if a Dsm 1990 transistor pack would work on the galant?



No you need a 91+ transistor for a GVR4, assuming it still has the factory engine and wiring.

Is this a different ECU from the one I fixed for you? You had it converted to be a 90 ECU.

 

Steve, CAPS says all DSM (1990-1994) resistor packs and the GVR-4 unit are the same. The original DSM part number was MD127666 but is replaced with MD172146 which is the GVR4 unit.

 

[stevep]

But he asked about the power transistor.

 

/ubbthreads/images/graemlins/banghead.gif

I swear I read "resistor pack." My bad.

 

The transistor pack won't cause just one cylinder to misfire, since each coil fires 2 cylinders. If it is an ignition problem, it would have to be a bad coilpack itself.

 

[Kenny_Kline]

ww

 

[frank1]

Quoting stevep:
Quoting frank1:

I wonder if a Dsm 1990 transistor pack would work on the galant?



No you need a 91+ transistor for a GVR4, assuming it still has the factory engine and wiring.

Is this a different ECU from the one I fixed for you? You had it converted to be a 90 ECU.



wow my bad i ment resistor pack i dont have a ingnition issue