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LE5 Crank sensor check
Trying to find out why no spark or fuel, on checking the ck sensor with a multi meter Iam getting 5vts on the main wire and signal wire, when I crank the motor the signal wire drops to 2.0 2.3 about half is this about right? or am i getting ready to look for a short in the wiring Ive got the I3 suite but still tryin to figure out how to use it to help diagnose my problem and vats are deleted,
this problem had me miss thanksgiving at the dunes dont wanna miss New Years too
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Are you able to successfully perform the crank position sensor relearn in the scanner?
Also, did you recently do any work on the cams or timing chain? If those are off by a tiny amount the LE5 will usually fail to initiate fuel and ignition at startup.
As for the voltage question, sorry I do not know the answer off-hand.
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nope I didnt see a sensor relearn in the scanner but Ill sure find it if its there and no havent messed with the cams at all. iam kinda leaning towards something in the stand alone harness, I got ahold of another e-37 and it didnt do anything either the motor ran great when we took it out, sent the harness in to get trimmed down for stand alone along with the ecm got it back and thats when it all headed south got nuthing now. Do you guys have a harness for an e-37 2.4 ecotec? Gonna go look for that cps relearn in the scanner it seems like the cps isnt working atleast all the symptoms are the same
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well I got it running, not well but I believe its running to lean, when i start it, it will run for a couple of seconds then it dies as soon as I touch the throttle I have gotten past that a couple times to where it stayed running but that was without the maf plugged in. Iam new to hp tuners and dont have a clue how to richen it up a little no vacuum leaks fixed all those but am getting 0016 nd 17 codes or atleast I was on the last scan they diidnt show up. what I need is a mentor to show me what I need to do, so if there are any tuners in phoenix that want to make some money and free BEER it would sure help me out on learning of the art tuning
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This doesn't sound like "tuning" problem.
I guess this is a swap vehicle?
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no its in a sand car, so yea i guess its in a swap vehicle
iam getting my constant 12 vlts to the ecm everything works fine fuel pump, fan, got a question for ya thou my commanded TPS ACTIVATED CONTROL is24.7 pos B is 30.1 pos d 23.1 and pos e is 11.3 does that sound right?
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No clue about the TPS Activated Control
As always start with posting a tune and a log.
What is the ECM out of?
My suggestion is to start with the wiring diagrams for the car this was pulled from and check on everything that might need to be connected to the ECM.
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checked wiring alls good when it start if i squirt starting fluid in it stays running, I pulled the injectors out and they are squirting like supposed too, so you think iam runnin too lean? do I need to add fuel to the tune? this is the first time running with a s/c on it, I got 40 lbs injectors
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Post a tune and log.
And all the details of the engine. Including part numbers for map and injectors.
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I gotta have it running first to create a log and I dont know how to post a tune or anything on here. as far as the part numbers go they are stock gm MAF from zzp and a 2.5 bar map sensor mounted on the intake Ill send the tuAttachment 128162ne as soon as i figure out the down loading problem iam haveing
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You can log an attempted start even if it never actually runs. Even Key on Engine Off may help some.
To be clear you pulled a motor from a running car and then added a supercharger without ever getting it running in its new home? You probably are going to wish you had gotten it running in stock configuration first and then modified. A lot going on that could be wrong.
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are you able to get my tune to work its up above its 3 e 67buggy loaded.hpt I know now about the swap, but i didnt think it would be that bad to get it going. Iam just about ready to throw this dam eco in the trash with all the headaches I,ve gotten from this thing. been so use to old school 68 yrs old and tryin to tune with a computer not gonna be fun or easy lol. If I could find someone to come over and talk me thru this it would make it a hell of alot easier ,awe but I know of no tuners to ask for help, so you guys are gonna have to bear with me. Once I get it running good enough I can get t to the dyno and hopefully get it straightened out but i dont know
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It will probably be this weekend before I have a chance to set down and compare. And I'm probably not experienced enough to spot the problem.
You can go here to look at some other supercharged LE5 tunes here.
https://dfkitcar.com/forum/index.php...g-thread.3708/
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1 Attachment(s)
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had a few minutes to compare. It looks like your map sensor data is incorrect but need a part # to confirm. If LSJ map sensor then linear is 270.59 offset is -3.3
How did you arrive at the injector data?
There are things changed from the "stock" that I'm not sure why they would be changed. I would set it back to stock unless you knew why you were changing it. For example the tach output type changed to crank.
Beyond, this I'm not much help.
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And did you change the diameter of the intake tube where the maf is mounted?
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hey stick with me now, your the only person that seems like the want to help right now. as fsr as the map # its bosch 0 261230042. the intake tube is 3" same as the throttle body and 7.5" plus a 90* elbow to center of the maf. I got the map #s and the injector data was given to me by someone on the cobalt forum.
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That map number corresponds to the LSJ that I gave numbers for above according to this post.
https://forum.hptuners.com/showthrea...l=1#post400484
Do you know the original size of the factory intake tube where the MAF is mounted? 3" sounds about right but the tube could be different in that area. If so it would change the maf calibration.
Was the injector data given for a particular part number or based only upon "40lb injectors". Still need to check the part number. Where did you source the injectors?
Still need to post whatever log you can get with as much of the ignition, fueling and sensor data that you can get. This will also show any DTCs to help trouble shoot.
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here is the tune AFI who i got the e-67 computer and wiring harness from, Iwas specific about what was on the motor as far as the map and injectors goes and my header I talked to their tuner and we made sure we were on the same page
Attachment 128243
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I got the injectors from ZZP they are the green ones bosch injectors42# SPECIFICATIONS:
COIL RESISTANCE: 12 OHMS HIGH IMPEDANCE
SPRAY PATTERN: DUAL SPRAY WIDE CONE / SPLIT CONE
ELECTRICAL CONNECTOR: EV1
FITTED WITH VITON UPPER AND LOWER O-RINGS.
STATIC FLOW RATE @ 43.5PSI (300KPA): 43 LB/HR
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1 Attachment(s)
Attachment 128263
this is the only log i got and its from afi that came with the ecm and harness. Iam going to spend the day learning to figure out the maf and fueling
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here is the only thing i have that resembles a log, I going to spend the rest of the day trying to learn how to figure my tables. [fuel, maf map]
Attachment 128264
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Connect to the vehicle with key on and engine off and start logging data. Then try and start. It doesn't have to run. Figuring out how to data log needs to be your first step so you can see if everything is connected to supply the correct data that it needs to run.
Do you have a wideband? You aren't going to be able to tune this without one.
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no but ill get a wideband tomorrow is there anything special about the wideband that i need to know or a good reference to the 1 i should get? i need to look this up tonight .
thanks gtstorey
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Not the best one to weigh in on Wideband. I have an ecotec LNF that came stock with a wideband. I think one of the AEM are usually the recommended go to. Might read this https://www.dfkitcar.com/forum/index...-sensors.3455/ since you need to get the WB reading into the log. If you aren't running AC, then using the AC pressure sensor wiring is probably the easiest way to do it.
It looks like your injectors are what are supposed to be (maybe) LSJ Stage 2 injectors and your data mostly matches that. You might want to download a stage 2 from the repository and change all of your injector data to match.
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Gotcha Ill get that done right away, question on the aem wide band they got one that has an interface that goes onto the obd will that one connect with HPT or will i still have to wire it in, looks like it will piggyback our interface?
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there is no stage 2 in the repository only stock tunes
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I don't know if your donor vehicle is a CAN vehicle or not. I'm also not sure what all of the options are on the MPVI3 to get the signal in. You should be able to do it with the pro cable though.
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i just ordered the aem with the obd interface that works with HP that way we dont have to get any cables, plug and play not cheap but good I hope. back in the shop now so I can get a new log or real one this time
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ya know, come to think of it I dont think it did have a intake tube on it,it had a stock throttle body which is maller than what i have now on the s/c that could be the reason why I have to choke it down a little bit to get it to stay runnin. I dont know the size of the stock tube but i will find out
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The maf sensor works off the speed of air moving past it. If the diameter of the tube where the maf is located is different, some changes will need to be made to the maf calibration.
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well Iam looking at it with a different perspective went out to the dunes yesterday as a co-pilot, hes got a turbo LS-7in his sand car, and the other car is running a coyote engine, and riding with these guys well this was the first time I had to eat a couple of drimane to settle my stomach dam are they fast!!!. also found out that the stock diameter is 2 5/8" not 3, and I found the crank relearn button Iswitched it on but i dont know the procedure or what nots to perform itshould have the wide band tomorrow got the one that goes in-between the obd and the hpt so i wont have to wire it in my log
.Attachment 128377
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If MAF tube was 2 5/8 stock and is now 3" you need to increase the air flow in the maf calibration table by about 30%.
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OK and I got the wideband this evening and got the bung welded in alreadyfinish hooking it up monyana.
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well bumped up the maf like you said I still need to choke it for about 3 sec then it smooths out and will continue to run, and idle I have to push the peddle slowly for it to accelerate smooth, go to far and it would die. finished hooking up the wideband and the numbers are jumping around Ill try to get that straight tomorrow and bump up the maf again Ill see how that goes
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What are you using for a throttle body?
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we cant see what your seeing and it hasn't been brought up yet so make sure your maf isn't installed backwards. They have do a direction and we're all prone to forgetting that on occassion.
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I,ve got the GM 12565553 throttle body mine came off of an 07 canyon but its the same as the one on the 2.0 cobalt, got a question on the TB, the vacuum line coming off of it mine is plugged should I get a new stem or leave it plugged? As far as the direction of the maf had my grand son take it off didnt pay attention which direction it was but I reinstalled it correctly. now to see if anything changed.
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Throttle bodies get very iffy when you say they are the same if they are DBW. You get into service number types of things that I don't know well enough to say whether a throttle body from a canyon will work with your ECM. There is programming that has to match, and you don't see it in HPT. What I remember from you tune is that you are running an ECM that is from a 2008 Pontiac G6 and it's very possible that won't work with that throttle body. But again, getting beyond my experience.