where repair ecu for 951??

ketchum951 · 09-28-2007, 05:07 PM

HI I post long time ago about 1986 951 the car has a weird hesitations , ! we replaced , the tps, all sensor , car is been in 2 different Porsche shops and they didn't fix it !!seems like nobody knows what the deal is!any way finally I got the car to an other Porsche shop and the mechanic said the problem is electrical!! any way he thought was speed reference sensors or ecu !! he replaced both sensors , car still same , so I want to send th ecu to a shop that can check it and repair if is bad?? will be better to buy one used from German auto dis and check if that fix issue or there is a shop that really works good and repair these ecu?or maybe could be the chips in ecu brand cup??? thanks

ae1969 · 09-28-2007, 05:22 PM

How about we start with details of what you are experiencing....
...and details on the car (mods etc)

Throwing parts are a car is a waste of time and money.

Troubleshooting these things is not that terribly difficult.

The only way to test the dme is to actually swap it. So if there is anyone in your area that has an 86 then that would be the ideal scenario.

The dme can be sent to any electronics shop. They clean it and resolder the connections. There are couple of spots on the dme that are notorious for failing due to poor connection... (injector drivers) or pick up a used one on ebay....

ketchum951 · 09-28-2007, 05:57 PM

thanks but I already spend alot of time last time here posting and fact is i don't work in my car !!at all, we already relace the common thing dmrelay, new tps, new dm coolant temp,brand new blow off valve,one of the shops think was fule so he put new filter , new damper------ I even did try the code reader and give me nothing, basic the car hesitated when you drive it i like try die you pump the gas pedal couple times and cars runs good and bad again same thing !!any way I live in Idaho and believe me there is not shops electrical here so i looking for a shop in California or whatever can send the ecu for testing and fixing if is what it is!!!

ae1969 · 09-28-2007, 07:34 PM

Fine.

http://www.**********.com/showitem.aspx?id=21&name=DME%20%2F%20ECU%20Control %20Unit&

Its your money.

How the pedal getting pumped a couple of times fixes a dme problem is beyond me.....

Good luck.

ketchum951 · 09-28-2007, 08:43 PM

ouch!!!! is little pricy you know someplace less expensive!!where I can send my own ecu to check and fix if is wrong ? is that less expensive send ecu to tech to fix or buy other one?

AaronM · 09-28-2007, 09:54 PM

Quote:

Originally Posted by ketchum951

ouch!!!! is little pricy you know someplace less expensive!!where I can send my own ecu to check and fix if is wrong ? is that less expensive send ecu to tech to fix or buy other one?

Actually, $550 for a complete ECU is a steal. Hell, it's $750+ for a rebuilt ECU for my Volvo.

No easy way to have it tested. The shop would simply rebuild it and send it back to you. However, it's obscenely unlikely that it's an ECU problem if pumping the gas pedal fixes the issue.

Have you tested the throttle position sensor and made sure it's adjusted properly? Just because you replaced it doesn't automatically mean it's set up correctly. The symptoms you describe are NOT indicative of a bad ECU and they are NOT indicative of bad speed or reference sensors. More likely vacuum leaks, the throttle position sensor, or a shot O2 sensor.

ae1969 · 09-29-2007, 08:37 AM

Ketchup.....

Since you are just over the border...... how about you let me buy that vehicle and put you out of your misery...........

nynor · 09-29-2007, 09:37 AM

have somebody test the supposedly bad DME in a different car.

ketchum951 · 10-01-2007, 07:18 PM

well--- I call the porsche shop where my car is been test , after 3 weeks there and different things the mechanic said "we found a loose wire from the afm "we will test drive the car tomorrow to see if that fix issue!@!!#!$@ is the 951 a real difficult car!to work in -- last week i visit his shop!!just to update and pressure him!! there were 1 rollroyce, 2 bmw 5 series, one e36 m3 , 2 targas, one 930, a old mercedes and my humble 951 !!!!he had smog test machine for vacumm, scaners, alot of tools !nice shop !why takes 4 weeks to find out a loose wire!hope it will be end of all my nights without sleep!!

nize · nize's Garage

hi ketchum. word of advice, if you post about issues and people respond to try to help you, and you disappear and never reply back on how our suggestions worked out, what makes you think we'll continue to help you?

go update your last thread here and give us a status update please;
still crazzy with 951 !!can'y sleep

otherwise we're just going to beat around the bush forever without actually solving anything, which will be a waste of time for everybody.

ketchum951 · 10-02-2007, 01:31 PM

yes totally agree but the problem I don't know if car is running good I talk to mechanic yesterday but he said will give me call as soon cars is good he ddin't yet so!!I'm just afraid to be harrass him!!i guess he get piss off everytime i give him a ring beacuse have alredy 3 weeks and he can't find problem,?

BY the way I do have a question , or a fact!! how cycle valve work or funtion!?? my car has a manual boost controler!! when I did1st post you guys recommended check vacuum diagram!! So I went all over car found that my cycle valve wasn't there so I asumming manual boost controler lindsey delete the cycle valve !!right!!!

nize · nize's Garage

if you search this forum for cycle valve, you will find the answer to all of your questions and more !

nize · nize's Garage

here's one thread to get you started;
bypassing cycling valve

note that there are MANY MORE threads describing exactly what the cycle valve does if you SEARCH for them ! all you have to do is search, how easy is that ?

nynor · 10-02-2007, 01:37 PM

i am unsubscribing from this thread, alina... or her sibling.

keith951 · 10-07-2007, 08:39 AM

I have a used 86 turbo DME available for $250.. took it out of a perfectly fine running car

email me at ksalnick@mix.wvu.edu if interested

thanks,
Keith

schmedes1 · 10-15-2007, 06:52 PM

Ketchum --

To answer the question you asked at the very beginning...

Specialized ECU Repair
812 N. Ocean Blvd, Suite 305
Pompano Beach, FL 33062
305-989-0724

Ask for Jose -- he knows the P951 DME real well. They can also test the KLR. If you call and set up the situation correctly, you will find out that they are willing to test your unit before either rebuilding it or selling you a reasonable quality rebuilt unit.

Of course, I agree that the first thing you should try is to put your unit in a car that runs and see if it will start. I have learned from personal experience that the DME is not the first thing to go.

ketchum951 · 10-16-2007, 02:01 PM

thanks but I feel fustrated!!, see this car was in so nice shape, but seems that none know what is the deal I alredy had 3 differents porsche shops take a look of it !!last old guy very well know porsche tech, fix some things like replace blow off valve, then regasket the wastgate!! and replace damper, !! but after long time in his shop he did't fix at all ---he had the car for 4 months I was sick of call him every week and get same answer I don't have time yet I think he work a couple hrs, and got crazzy he didn't know alot about 944 to fix it !!so I move to the other good know mechanic a younger guy 38 -43 years old alot of porsche 911 and other germans cars are his clients., he seems have all good tools, scaners !!well is been a month and half , I call him every 2 weeks as fact today , he told me first , car dosn't have vacumm leaks(he test it with snap on smoke tester),he said the problem car has is electrical!!!! first he test the speed sensor told me one seems little damage he replace it but didn;t fix running problem!!then I called him 2 weesk ago he said a wire was kind of funny from maf , !but didn't fix it neighter!!! I personaly order new tps sensor, new dmw relay , new ecu temp sensor, still same thing , car , run great but after a some minutes driving it suddenly start to try to die (like not noises, nothing is just like some one umplegged the battery , then so the couple time i drove it like that I just crank it rolling motion with a shift from 4 to second it star running again, good for little minutes and same thing one you take gas of pedal you can see all light in dash board !!car stopping running!is crazzy!!!!! I was planning to buy new afm, and test if that is , or buy other set of ecu!!the car has aftermark chips called cups!!!not idea !!wondering if a ecu chip can go wrong!! I don't really know how ecu works! but I not 100% agree ecu is problem, the car dosn't have cycle valve I got the car like that a manula boost controler in the engine bay!!and different tial waste gate and k27 #6 turbo!! 3.0 bar fpr !!that I know about the car!!!!again I'm not mechanic orientated! I own 2 911 and always want to have a turbo 944 !!!but really I regreat!!!!!car is drive me nuts!!!! mechanic said it will take him more testting and he will call me when he found wast is wrong with estimated!!! he will charge alot of hrs I can see that!!!!!IF someone is really nice !!and willing help please give a call to my mech his name is greg 1208-3424450 I'm sure he can used some help !!!I willing to send some mony to the person can help him find mistery problem of this 951 !!ask him for fernado 944 turbo he will know thanks alot

nize · nize's Garage

what are the names of the shops you've taken the car to?

nynor · 10-16-2007, 02:56 PM

Quote:

Originally Posted by ketchum951

thanks but I feel fustrated!!, see this car was in so nice shape, but seems that none know what is the deal I alredy had 3 differents porsche shops take a look of it !!last old guy very well know porsche tech, fix some things like replace blow off valve, then regasket the wastgate!! and replace damper, !! but after long time in his shop he did't fix at all ---he had the car for 4 months I was sick of call him every week and get same answer I don't have time yet I think he work a couple hrs, and got crazzy he didn't know alot about 944 to fix it !!so I move to the other good know mechanic a younger guy 38 -43 years old alot of porsche 911 and other germans cars are his clients., he seems have all good tools, scaners !!well is been a month and half , I call him every 2 weeks as fact today , he told me first , car dosn't have vacumm leaks(he test it with snap on smoke tester),he said the problem car has is electrical!!!! first he test the speed sensor told me one seems little damage he replace it but didn;t fix running problem!!then I called him 2 weesk ago he said a wire was kind of funny from maf , !but didn't fix it neighter!!! I personaly order new tps sensor, new dmw relay , new ecu temp sensor, still same thing , car , run great but after a some minutes driving it suddenly start to try to die (like not noises, nothing is just like some one umplegged the battery , then so the couple time i drove it like that I just crank it rolling motion with a shift from 4 to second it star running again, good for little minutes and same thing one you take gas of pedal you can see all light in dash board !!car stopping running!is crazzy!!!!! I was planning to buy new afm, and test if that is , or buy other set of ecu!!the car has aftermark chips called cups!!!not idea !!wondering if a ecu chip can go wrong!! I don't really know how ecu works! but I not 100% agree ecu is problem, the car dosn't have cycle valve I got the car like that a manula boost controler in the engine bay!!and different tial waste gate and k27 #6 turbo!! 3.0 bar fpr !!that I know about the car!!!!again I'm not mechanic orientated! I own 2 911 and always want to have a turbo 944 !!!but really I regreat!!!!!car is drive me nuts!!!! mechanic said it will take him more testting and he will call me when he found wast is wrong with estimated!!! he will charge alot of hrs I can see that!!!!!IF someone is really nice !!and willing help please give a call to my mech his name is greg 1208-3424450 I'm sure he can used some help !!!I willing to send some mony to the person can help him find mistery problem of this 951 !!ask him for fernado 944 turbo he will know thanks alot

maybe i read it wrong, but in the other post, i am pretty sure you said that the problem was solved... so which is it, alina, problem solved, or continuing issues? if you want, and the car really exists, i'll take this problem off of your hands and give you $1000.00. let me know.

metritype · 07-31-2008, 12:36 PM

Does this sound like the problem?

Starts as a hesitation you're not even sure happened. As it gets worse, you think the engine has shut off. But it restarts by itself so fast that you're still not sure it shut off. It doesn't create a serious driving problem -- at least on the highway. It starts happening more frequently, and it gets worse. Now it shuts off and doesn't restart, so you have to coast to the side of the road and restart the car. Then it becomes more difficult to start -- and restart --the car. Through all of this, the problem is intermittent. Car might be fine for days -- and then it happens again. Or it might happen once or twice when you first drive that day, and not happen again all day. It will finally reach the point where you cannot start the car at all. (Turns over fine, but will not start.)

If yes, it's the ECU ("computer," "brain"). I have just resolved that after about eight months of trying to find the problem. The ECU was always suspected, but because it was intermittent, we thought it might be something else. Finally tested the car with another ECU and no more problem.

1985.5 944 (which I believe uses the 1986-1989 unit). Bosch part number 0261200058. Porsche part number 944.618.121.02.