What would make the ECM go into limp home mode?

[SYO237]

Re: What would make the ECM go into limp home mode?

I have 3 or 4 ecm's.

There ya go Yeti... if you dont get ahold of one, let me know, I'll get one from Gary and bring it over to try out.

 

[TYTILIDIE]

Re: What would make the ECM go into limp home mode?

Just buy one from Autozone for $85 and if it isn't the problem take it back and say you never installed it. You could have it done today.

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

Just buy one from Autozone for $85 and if it isn't the problem take it back and say you never installed it. You could have it done today.

I have one coming already. I actually called them but it is like dealing with the guys that change your oil, they don't know much about cars to begin with and if they type the wrong thing into the computer or don't know where to look it doesn't exist. Do you have the part # for future reference?

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

I dont have a spare ECM laying around unfortunately. I need an excuse to goto Melbourne anyhow to go hit up one of my surf shops and maybe surf if there is anything rideable...but I wont be able to get your way for 1-2 weeks. If one of the FAST guys has one they can send me to borrow and take over to Yeti, I'll take responsibility of taking care of it and returning it.

I could probably bring my chip out of the Syclone to try. I also have 50# injectors, but im running code59. Dig...I can safely remove my chip and put it in Yeti's truck without issue right?

Anyhow.... just so we are clear, the truck ran fine before the battery swap? You mentioned you been slowly fixing it since you bought it. What other issues did it have? Possible something in the past is coming back to haunt you?

My assumption from reading all this is either bad ECM (maybe when moving the battery, something shorted and fried the ECM?), or I was going to say bad chip (maybe it didnt burn/emulate right, error'd and phil didnt notice it....it happens, ask me how I know after limping down daytona beach after a bad emulation)....but if the truck ran fine before the battery swap, Im going back to bad ECM. If the ECM swap doesnt fix the issue, my next move would be to get a newly emulated chip to try.

Gary was the only one to mention ignition module/distributor which Ive learned from his experiences are now starting to be common culprits for issues and have become part of the commonly asked "did you check this" list.

Other things to check is fuel pressure, timing, and of course all your grounds again, especially near the battery in the original and new location.

Truck ran great. When I meant I was fixing it up I meant cleaning up the interior and removing all the wiring from the head unit to where an amp and box were in the trunk, ect.
I have an ECM coming now, the only logicial thing I can think is not even a split second the ground may have moved on the battery and if that shorted out the ECM, wow, these things are extremely tempermental. I have a wideband I need to throw on the truck off my Viper, I will do it this weekend and hope the ECM fixes it and see what the a/f is and hope the chip is still good. I have Phils contact info if it turns out to be bad.

All the grounds are great, double checked yesterday. I will be doing a tune up on the truck once I get the richness fixed because the plugs have to be fouled as well as the O2 so perhaps putting in an ignition module will not hurt either.

It would be cool to meet you, we can hit up the waves before or after...gotta head alittle north of Melbourne, the surf has been crap for a few years.

 

[SYO237]

Re: What would make the ECM go into limp home mode?

It would be cool to meet you, we can hit up the waves before or after...gotta head alittle north of Melbourne, the surf has been crap for a few years.

Then drive up to me... :tup:I live close by to New Smyrna. (Right off I-4, 2 exits south of 44) I used to frequent Cocoa (2nd light, tables, 16th street, officers club) all the time back in the day, but when its 1-3ft up here at Ponce or Smyrna, its a lake down there. Only time I really go down there now is to get supplies for the business....but Ive got my guys at the shops that bring me it, so dont have to make the drive

And you've been missing it if its been years for you.... it was 12-13ft during Hurricane Bill!
http://www.syty.net/forums/showthread.php?t=70932&highlight=surf

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

Then drive up to me... :tup:I live close by to New Smyrna. (Right off I-4, 2 exits south of 44) I used to frequent Cocoa (2nd light, tables, 16th street, officers club) all the time back in the day, but when its 1-3ft up here at Ponce or Smyrna, its a lake down there. Only time I really go down there now is to get supplies for the business....but Ive got my guys at the shops that bring me it, so dont have to make the drive

And you've been missing it if its been years for you.... it was 12-13ft during Hurricane Bill!
http://www.syty.net/forums/showthread.php?t=70932&highlight=surf

Now thats some waves! Our beaches have not been the same since they pumped all the sand up to the shores a couple years back. I have to go to Patrick AFB minimal to get any decent surf. Once the truck is running better I'll make a trip up there, no reason to run it that distance as rich as it is running, don't need to risk hurting the engine more and my Viper is on road racing tires so I am stuck here for the mean time.

 

[GAShan]

Re: What would make the ECM go into limp home mode?

GM part numbers are 1227749 originally, superceded by 16198263

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

GM part numbers are 1227749 originally, superceded by 16198263

Thats funny you just posted this, I was just on autozone.com and found it. Now, if I buy one if they have it in stock what all needs to be swapped over from my current ECM? Just the V5-50 chip and the ribbon style connection (see pics on page 2 or 3)?

Edit, just called with the part number, the kid didn't even know what a Typhoon was until his drop down box showed it on the list...2 days out...boo, I would have picked it up as well but the other one should be here by then.

 

[SYO237]

Re: What would make the ECM go into limp home mode?

You will find at Autozone, that they have SyTy listed, but half the time the parts are wrong and you have to go by a 91-93 GMC/Chevy Sonoma S10 Jimmy Blazer.

I used to be a commercial manager for AZ long ago I have amazing stories

 

[TYTILIDIE]

Re: What would make the ECM go into limp home mode?

Thats funny you just posted this, I was just on autozone.com and found it. Now, if I buy one if they have it in stock what all needs to be swapped over from my current ECM? Just the V5-50 chip and the ribbon style connection (see pics on page 2 or 3)?

Edit, just called with the part number, the kid didn't even know what a Typhoon was until his drop down box showed it on the list...2 days out...boo, I would have picked it up as well but the other one should be here by then.

2 days? Mine always seems two have one or two in stock. Interesting. I have experienced what Adam is talking about with Autozone but fortunately have not had that issue with them on an ECM. Don't try and buy a MAP sensor from them though. :lol:

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

2 days? Mine always seems two have one or two in stock. Interesting. I have experienced what Adam is talking about with Autozone but fortunately have not had that issue with them on an ECM. Don't try and buy a MAP sensor from them though. :lol:

Yeah, it is funny. They have the ECMs in stock in Orlando warehouse, less than an hour away but will take 2 days to get in. I could drive over there sooner, what a waste of time. And yes, I know all about getting the wrong parts, I mainly started out working on Ford Taurus SHOs and 9 out of 10 times they sell you the wrong thing.

 

[akwilks]

Re: What would make the ECM go into limp home mode?

I used a scanner yesterday and only got code 12 (normal). Again it ran great after leaving the battery and ECMb fuse disconnected for a day and the next startup= same crap, died on first startup, have to hold the gas pedal to the floor to start it up and do the same to keep it idling. Idle spikes 400 rpms or so until it warms up.
Nothing, literally nothing was disconnected from the system when I installed the battery box. I just lifted the battery up still connected to the system and dropped it in. Very frustrating...

I dealt with the same crap. My solution, return everything back to stock and throw that chip in the trash. 50# chips are so difficult to manage. Its always something, fuel pressure, fouled plugs, stalling at idle, just to name a few. I couldnt get that chip to run and I doubt that many others are running that chip either.

 

[turbodig]

Re: What would make the ECM go into limp home mode?

I could probably bring my chip out of the Syclone to try. I also have 50# injectors, but im running code59. Dig...I can safely remove my chip and put it in Yeti's truck without issue right?

.

Yep, it'll be fine. Pull the whole ECM if it's not mounted, that way you can just plug the whole thing in and try it. Would rule out the whole assembly that way.

I love the Moates switcher under the cupholder idea... very sneaky.

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

I love the Moates switcher under the cupholder idea... very sneaky.

That is what that is?

Also, screwing around with the Typhoon last night I was able to get the check engine light to come on for a brief second...I immediatly pulled over and ran the codes with the basic scanner I have and codr 15 appeared- coolant temp sensor voltage high I believe it was. I want to replace it now that it was mentioned before but never threw a code- is the correct part number SU109 dor the Duralast sensor.

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

I dealt with the same crap. My solution, return everything back to stock and throw that chip in the trash. 50# chips are so difficult to manage. Its always something, fuel pressure, fouled plugs, stalling at idle, just to name a few. I couldnt get that chip to run and I doubt that many others are running that chip either.

No way, Id rather sell the truck as is than try to return it to stock with parts I don't have. From what I have read Phils chip was the only way to go with the 50lb'ers, especially if already having issues with other chips.

 

[turbodig]

Re: What would make the ECM go into limp home mode?

That is what that is?

Also, screwing around with the Typhoon last night I was able to get the check engine light to come on for a brief second...I immediatly pulled over and ran the codes with the basic scanner I have and codr 15 appeared- coolant temp sensor voltage high I believe it was. I want to replace it now that it was mentioned before but never threw a code- is the correct part number SU109 dor the Duralast sensor.

This could explain what you're seeing- a faulty CTS could cause the ECM to think that it's much colder than it really was, adding more fuel to compensate.

This from sytyauthority.net:

GM #15326386
GP Sorenson #TSU81
Niehoff #DR134AK
Standard #TX3
Wells #SU109


Pretty much all of the chips (with the Ultimate as an exception) built after the late 90s were based on Moates hardware. Anything you can still get today will be Moates. Yours is an older one, the new ones have up/down buttons.

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

This could explain what you're seeing- a faulty CTS could cause the ECM to think that it's much colder than it really was, adding more fuel to compensate.

This from sytyauthority.net:

GM #15326386
GP Sorenson #TSU81
Niehoff #DR134AK
Standard #TX3
Wells #SU109


Pretty much all of the chips (with the Ultimate as an exception) built after the late 90s were based on Moates hardware. Anything you can still get today will be Moates. Yours is an older one, the new ones have up/down buttons.

Thanks for the part numbers, the SU109 is what AZ stocks. I'm glad I actually got the check engine to come on, I should have the CTS delivered here in a few so I'll swap it out.
So how exactly does the moates work? I went to their website but there is not much of a description- I'm assuming I can run multiple tunes burnt onto one chip? Correct me if I am wrong- I didn't find much of a description on here while I was searching.

 

[turbodig]

Re: What would make the ECM go into limp home mode?

Thanks for the part numbers, the SU109 is what AZ stocks. I'm glad I actually got the check engine to come on, I should have the CTS delivered here in a few so I'll swap it out.
So how exactly does the moates work? I went to their website but there is not much of a description- I'm assuming I can run multiple tunes burnt onto one chip? Correct me if I am wrong- I didn't find much of a description on here while I was searching.

The moates switcher just allows you to swtich between a number of different calibrations in the chip.
Basically, it's like having 16 different "chips".

As to what was burned into the the chip, you'd have to get get that info from the guy that burned it, or the owner that installed it.

Have you tried different switch positions in all of this, or is it still on the same one?

 

[The Yeti]

Re: What would make the ECM go into limp home mode?

The moates switcher just allows you to swtich between a number of different calibrations in the chip.
Basically, it's like having 16 different "chips".

As to what was burned into the the chip, you'd have to get get that info from the guy that burned it, or the owner that installed it.

Have you tried different switch positions in all of this, or is it still on the same one?

I've switched it around a few settings but nothing made a difference, I actually never touched it until all this happened thinking someone accidentally touched the switch. I am going to play with it alittle more knock on wood when the new ECM arrives. I will probably contact Phil after this all clears up and let him know how it is running and if it alitttle off have him reburn something alittle better with and maybe one for the track if I want to shoot alittle more PSI.
Put in a new CTS and it still runs rich but does not spike around rpm wise during warmup.

 

[cloneman315]

Re: What would make the ECM go into limp home mode?

that 50 pound chip that phill was selling was tuned on my truck on the dyno and has been used in a ton of trucks,there is nothing wrong with that chip!guys want to blame the chip.That chip is one of the best 50 chips out there.I mean me and phill and many others have went very good with it,I went mid 11s on stock motor,with turbo and inj upgrade etc.phill went 10s!!