Ecm
Thread Starter
Burning Brakes
Joined: Jul 2017
Posts: 750
Likes: 86
From: St Petersburg
Ecm
is there a way to test the ECM ?
1989 convertable 6 speed
we have tried everything
we have new fuel pump and have preasure. if we spray cleaner into air intake engine fires
but it won't start
No signal to injectors I think
and is there a certain ECM to but for the 6 speed ?
or send it off to be fiixed?
1989 convertable 6 speed
we have tried everything
we have new fuel pump and have preasure. if we spray cleaner into air intake engine fires
but it won't start
No signal to injectors I think
and is there a certain ECM to but for the 6 speed ?
or send it off to be fiixed?
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,677
is there a way to test the ECM ?
1989 convertable 6 speed
we have tried everything
we have new fuel pump and have preasure. if we spray cleaner into air intake engine fires
but it won't start
No signal to injectors I think
and is there a certain ECM to but for the 6 speed ?
or send it off to be fiixed?
1989 convertable 6 speed
we have tried everything
we have new fuel pump and have preasure. if we spray cleaner into air intake engine fires
but it won't start
No signal to injectors I think
and is there a certain ECM to but for the 6 speed ?
or send it off to be fiixed?
the only real test is to plug a known hood ECM into your car and if it works, it works.
Melting Slicks
Joined: Jul 2005
Posts: 2,231
Likes: 302
is there a way to test the ECM ?
1989 convertable 6 speed
we have tried everything
we have new fuel pump and have preasure. if we spray cleaner into air intake engine fires
but it won't start
No signal to injectors I think
and is there a certain ECM to but for the 6 speed ?
or send it off to be fiixed?
1989 convertable 6 speed
we have tried everything
we have new fuel pump and have preasure. if we spray cleaner into air intake engine fires
but it won't start
No signal to injectors I think
and is there a certain ECM to but for the 6 speed ?
or send it off to be fiixed?
Melting Slicks
Joined: Nov 2016
Posts: 2,256
Likes: 3,084
From: So Cal
2023 C4 of the Year Finalist - Unmodified
Have you verified that there is no Code 46 with the key in RUN? (In a 1986-1989 there is no other indication of a lack of Fuel Enable signal other than the presence of Code 46).
Based on your symptoms, check for Code 46 before you do anything else.
Drifting
Joined: Nov 2015
Posts: 1,720
Likes: 332
Finalist 2020 C4 of the Year - Unmodified
A good check mark for the ECM is getting the code 12. When my ECM failed (dumbass ignition on while connecting battery mistake), no code 12 or anything else.
Might as well chase VATS bypass, it'll fail eventually anyway.
Might as well chase VATS bypass, it'll fail eventually anyway.
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Melting Slicks
Joined: Nov 2016
Posts: 2,256
Likes: 3,084
From: So Cal
2023 C4 of the Year Finalist - Unmodified
Does the fuel pump run for the 2 second prime and stop? Leaving the key in RUN after it stops, breifly crank the engine. Does the fuel pump run again for 2 seconds and stop? If = YES, the ECM received reference pulses. If = NO, the ECM did not receive reference pulses. (Is the 4-cavity connector behind the distributor plugged in and tight? )
If there are reference pulses, and the INJ1 and INJ2 fuses are good, then the lack of fuel is the injectors themselves, or inadequate pressure.
If there are reference pulses, and the INJ1 and INJ2 fuses are good, then the lack of fuel is the injectors themselves, or inadequate pressure.