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  #1  
Old 08-03-2009, 11:51 AM
Platinum89SHO Platinum89SHO is offline
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Default No Start 89 SHO

No-Start SHO

Having owned and driven this car for six years with the only previous no-start being caused by a small cat unplugging the main power to the fuel pump, the connector next to the radiator, while clawing its way into the engine compartment, and now the car is dead in the carport.

I pulled the KOEO codes and got:

15 Failure in Electronic Control Assembly (ECA) problems with Keep Alive
Memory.

And in Continuous Memory:

66 Mass Air Flow (MAF) sensor voltage too low.

I replaced the ECA with a factory refurbished one, leaving off the “SuperChip” that was plugged into the old unit.

Charged the batt and cleaned the terminals.

The SHO still would not start.

I pulled the KOEO codes again and got:

11 System Pass

Everything seems normal except the starting. The fuel pump turns on and then shuts off as normal, assuming it has reached pressure.

I pulled a plug wire and inserted a new spark plug into the boot, grounding it to the negative post. No spark.

Any suggestions on how to proceed?
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  #2  
Old 08-03-2009, 12:10 PM
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elarm1 elarm1 is offline
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What is it doing while trying to start? Tach bouncing? Sounds ignition related to me.
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  #3  
Old 08-03-2009, 12:25 PM
Off Road SHO Off Road SHO is offline
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Check to make sure that you did not inadvertently leave off a ground wire somewhere. Also make sure that the PCM, (the computer that is buried in the firewall above the glove box) that you changed out is getting 1: power and 2: ground. I don't have my EVTM's nearby but I think the PCM get's ignition switch power on pins 37 and 57. I can't remember which pin is the "always hot" pin (usually yellow in color and I think it's in position 1) on the PCM.

Also make sure that the little single wire connector behind the plenum crossover tube, is connected. That is the grounding wire for the Crank Position Sensor and is right next to but separate from the crank sensors main feed plug.

Tom
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  #4  
Old 08-03-2009, 01:32 PM
Platinum89SHO Platinum89SHO is offline
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"Tach bouncing? Sounds ignition related to me."

The tach moves to approx. 200 rpm then backs off a bit every time I hit the ignitiion switch. Is this the bounce? The starter works fine, BTW. Everything electric works as it always had. The check engine light only came on during starting and then would go off.

I checked (3) ground locations on the passenger side of the engine compartment, found one loose and tightened it. Still no start.

All wires appear to be plugged up properly. The only thing I disconnected is the battery ground terminal and the ECA (ECA = PCM?) main connector. I believe that connector was put back in properly.

Other than that, nothing has been touched since the last time it ran. There was no warning to this failure. It was running good when I parked it. Came back the next day and it won't crank.

I also grounded the lower screw of the DIS to the negative post and grounded an intake manifold bolt head to the negative post. Still no start.

Last edited by Platinum89SHO; 08-03-2009 at 01:34 PM.
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  #5  
Old 08-03-2009, 02:11 PM
Off Road SHO Off Road SHO is offline
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[QUOTE=Platinum89SHO;1071438 There was no warning to this failure. It was running good when I parked it. Came back the next day and it won't crank. QUOTE]

Oh, so it won't even crank? That's a different scenario all together.

Tom
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  #6  
Old 08-03-2009, 02:14 PM
Off Road SHO Off Road SHO is offline
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Quote:
Originally Posted by Platinum89SHO View Post
No-Start SHO

Having owned and driven this car for six years with the only previous no-start being caused by a small cat unplugging the main power to the fuel pump, the connector next to the radiator, while clawing its way into the engine compartment, and now the car is dead in the carport.

Any suggestions on how to proceed?

I believe the PCM gets its power from the CCRM near the radiator. Has that catclaw damage been repaired completely?

Tom
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  #7  
Old 08-03-2009, 03:23 PM
Platinum89SHO Platinum89SHO is offline
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Sorry, the starter motor turns the engine over fine, but no spark, so it doesn't start.

The catclaw problem was over a year ago and have had no problem since replugging and taping the connector together. The cat was a stray at another location and is not part of the existing problem.

Looking at an ECM pin diagram, I'm wondering if the ignition switch could be a problem?

I'm also reasoning that if the ECM were not getting power or ground, the code reader may not work(???)
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  #8  
Old 08-03-2009, 03:54 PM
CademiaX CademiaX is offline
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cps possibly? If there is for sure no spark or fuel, that would be a likely cause.
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Old 08-03-2009, 04:51 PM
Off Road SHO Off Road SHO is offline
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Could be a switch problem. From the switch I think the power goes through the clutch safety interlock switch and then to the PCM.

Tom
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  #10  
Old 08-10-2009, 09:34 PM
Platinum89SHO Platinum89SHO is offline
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If it's a CPS, won't a code show up?

PCM = ECA? Or is the PCM a separate module from the main computer?
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Old 08-10-2009, 09:38 PM
1bad98SHO 1bad98SHO is offline
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PCM is the main computer. PCM;ECM same thing
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  #12  
Old 08-13-2009, 09:33 PM
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if you need a no start sheet (step by step flow chart let me know pm me an email adress
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  #13  
Old 10-04-2009, 06:28 PM
Platinum89SHO Platinum89SHO is offline
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I had to put the SHO repair off while working on renovations to my home for the last two months.

Today I pulled the ECA (PCM, ECM) and inspected the pins, cleaned them and re-installed. Re-installed the "SuperChip". No start.

I pulled a plug wire and inserted a good spark plug and grounded it. Cranked the engine over with the key on. No spark.

Ran another KOEO with the code reader. Once again, had "11" in both memories (System Pass). Still no-start.

If I had a bad CPS (crank position sensor), wouldn't I have a code showing up?

Even with the old ECA, it didn't have a code for a bad CPS. The only code I got was a "15" = ECA bad keep alive memory.

Could I have gotten a bad remanufactured ECA?
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