Is my computer dead?

mustang1994 · May 4, 2009

i got codes 511, 172, 176, 543. I have a dead computer don't I??

HISSIN50 · May 4, 2009

If the EEC was dead, it would not spit codes.

For 511, be sure the KAM receives power. Check your EEC fuse (underhood fusebox) to be sure it's ok and the fuse's tangs make good contact with the terminals.

You might have an issue with your CCRM if your EEC is acting up intermittantly and the fuel pump doesnt always run when it should.

What are the symptoms?

mustang1994 · May 5, 2009

HISSIN50 said:
If the EEC was dead, it would not spit codes.

For 511, be sure the KAM receives power. Check your EEC fuse (underhood fusebox) to be sure it's ok and the fuse's tangs make good contact with the terminals.

You might have an issue with your CCRM if your EEC is acting up intermittantly and the fuel pump doesnt always run when it should.

What are the symptoms?

Well, rough idle, won't stay idle, runs VERY RICH, backfires, verrrry sluggish running, spits black smoke.

HISSIN50 · May 5, 2009

You have codes for leanness so that makes sense. I would attack the symptoms first, get it to run decently, and then see if I can solve the 500-series codes.

For starters, I'd want to be sure the MAF is functioning properly. Make sure the ducting is tight and the wires aren't gross. Look for vac lines that are detached.

cjones · May 5, 2009

sorry but 512 is KAM.

511 is ROM test failure...according to ford a 511 is replace PCM though some say you should check for power at Pin #1 YE before replacing it. if no power then check EEC 20Amp fuse.

HISSIN50 · May 5, 2009

Pin 1 is the KAM. Hence my comments above.

511 can also be generated with a tuning interface that didnt have a checksum entered into the tune to keep the code at bay.

cjones · May 5, 2009

but according to ford pin 1 has nothing to do with 511. if the EEC fuse was blown then the car would not start because there would be no power to the EEC relay hence no power to the EEC. i stated to check power there just because some techs i know had said to do that in the past. when i had 511's on customer's cars i still had power there and replaced the EEC (after running through the EEC replacement checklist) and the vehicle started right up and ran fine.

and yes, it could be generated by the tune but he didn't say he had one so i made the mistake of assuming he didn't have a chip/tune.

mustang1994 · May 5, 2009

cjones said:
but according to ford pin 1 has nothing to do with 511. if the EEC fuse was blown then the car would not start because there would be no power to the EEC relay hence no power to the EEC. i stated to check power there just because some techs i know had said to do that in the past. when i had 511's on customer's cars i still had power there and replaced the EEC (after running through the EEC replacement checklist) and the vehicle started right up and ran fine.

and yes, it could be generated by the tune but he didn't say he had one so i made the mistake of assuming he didn't have a chip/tune.

So you can't just add a chip to the computer is what you're saying?

cjones · May 5, 2009

mustang1994 said:
So you can't just add a chip to the computer is what you're saying?

no, what we're saying is a chip could cause a FALSE code 511.

mustang1994 · May 6, 2009

cjones said:
no, what we're saying is a chip could cause a FALSE code 511.

well, I think I got ripped by buying a new computer for 250 bucks

Don 95Vert · May 6, 2009

You'll get a lot of misc codes and horrid running if there is a problem with 02 sensor wires, as in, insulation missing and grounding out or touching other wires with missing insulation. Seen this on 4-5 cars. On a couple we SWORE it wasn't a problem until we took the harness off and examined it closely - sure enough that was it. Insulation was missing near a frame location. These cars are getting old and the insulation on all the wires is getting brittle, especially in areas where the wires go through lots of heat cycles. I'm not saying that this is your problem, but it is one more thing for you to look at.

Don

MysteryMachine · May 7, 2009

Actually Hissin a bad pcm will throw codes. It will def run like ****. Been there

The O.G. · May 7, 2009

MysteryMachine said:
Actually Hissin a bad pcm will throw codes. It will def run like ****. Been there

Bad and dead being different?

Whats up with the bbf project?

MysteryMachine · May 7, 2009

on hold till the ram is done. I got a new job now. I hope that after the truck is done to start working on the car. The way the machine shop has been it could be a while.

Well I might buy a engine to just drop in to get it back on the road. Then do up the 514

Is my computer dead?

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