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Driver
 
Join Date: Jan 2004
Location: Gahanna, Ohio
Posts: 542
Garage
Is a new DME the answer?

Hi all,

My '87 NA 944 is a great car, but at 32 years old it is a little stumbly on acceleration, idle isn't as smooth as it might be, etc.

I have worked through some things that have definitely helped (O2 sensor) J boots, etc.

My question is this:

Might I reasonably expect that putting in one of the new FTech DMEs might produce an overall smoother car, or am I throwing my money away?

I am positing that over 32 years the signals that come out of the DME might be irregular in terms of voltage, signals etc. (albeit to a small degree since the car still runs), & a brand new brain might make things better.

So what do you all think?

Reasonable or a waste of money?

Thanks in advance,

GHEN
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'87 944
Old 10-02-2019, 05:31 PM
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Join Date: Jul 2004
Location: Upstate New York
Posts: 2,275
Waste of money. DMEs don't deteriorate performance. They either work or they don't.

Spend your money/time first fixing vacuum leaks, grounds, blueprint injectors, plug wires, spark plugs, etc.
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Good luck, George Beuselinck
www.944ecology.com
Porsche Deconstructor (tm)
We buy 944s and sell 944 parts (845-379-1944)
We rebuild torque tubes and instrument clusters for 944/968/928
Old 10-02-2019, 05:42 PM
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Driver
 
Join Date: Jan 2004
Location: Gahanna, Ohio
Posts: 542
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Quote:
Originally Posted by 944 Ecology View Post
Waste of money. DMEs don't deteriorate performance. They either work or they don't.

Spend your money/time first fixing vacuum leaks, grounds, blueprint injectors, plug wires, spark plugs, etc.
Thanks George, appreciate the advice. I've done most of your list, haven't messed with vacuum leaks yet...need to figure that out.

GHEN
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'87 944
Old 10-02-2019, 05:46 PM
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Location: Upstate New York
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Build yourself a smoke machine, then attach it to the J boot. Any vacuum leak will leak smoke...

https://www.youtube.com/watch?v=GOhl4r0GSiE
__________________
Good luck, George Beuselinck
www.944ecology.com
Porsche Deconstructor (tm)
We buy 944s and sell 944 parts (845-379-1944)
We rebuild torque tubes and instrument clusters for 944/968/928
Old 10-02-2019, 05:49 PM
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Join Date: Mar 2008
Location: Nashville, TN
Posts: 3,590
what you do want, once leaks are fixed, is to ****-can the stock DME/AFM and get a newer ECU with a MAF or MAP setup.
Old 10-03-2019, 09:43 AM
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