question concerning engine dyno test

GM specific tuning forum for Chevrolet, Cadillac, Pontiac, Buick, Oldsmobile, Hummer, and GMC

question concerning engine dyno test

Unread postby enginedynonoob » Thu Jul 30, 2020 10:47 pm

Hello, I don't know if this is a place I can ask this question. If not please tell me where to post this question please.

If I am at the right place please help me.



I have few questions.
1_My present situation.
*I'm trying to do an ENGINE DYNO VEHICLE EMISSION TEST.
*The ECM I am going to use is not from the vehicle which will be tested. I have an other ECM just for testing from the same vehicle model.

*Once the engine is installed on the dyno bench for the engine dyno test and check for DTC I have Crankshaft Position System Variation Not Learned(P0315) & Lost Communication With Body Control Module(U0140).

*When I try to do the Crankshaft Position System Variation relearn, it won't work.

2_ My questions.

1) Is there no problem for the test even I don't do the Crankshaft Position System Variation relearn?
2) I think that the Crankshaft Position System Variation relearn can't be performed because of the Lost Communication With Body Control Module(U0140) DTC. Is that correct?
3) Is there no problem for the test even if I have Lost Communication With Body Control Module(U0140) DTC ?
enginedynonoob
General Poster
 
Posts: 9
Joined: Thu Jul 30, 2020 10:44 pm
Name: John
Vehicle Information: 2020 Chevrolet Express van G4500 cutaway

Re: question concerning engine dyno test

Unread postby decipha » Fri Jul 31, 2020 11:24 am

none of that will affect emissions unless the engine is misfiring.
User avatar
decipha
Tooner
 
Posts: 20698
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Decipha Ponto
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Other Vehicle(s): Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer
06 Chrysler 300 AWD - Sharifa

Re: question concerning engine dyno test

Unread postby enginedynonoob » Fri Jul 31, 2020 11:43 am

decipha wrote:none of that will affect emissions unless the engine is misfiring.

Thank you for the feedback.
Do you have any idea concerning my number 2 question? The reason why the relearn is not being done.
enginedynonoob
General Poster
 
Posts: 9
Joined: Thu Jul 30, 2020 10:44 pm
Name: John
Vehicle Information: 2020 Chevrolet Express van G4500 cutaway

Re: question concerning engine dyno test

Unread postby decipha » Fri Jul 31, 2020 12:52 pm

On the ford coyotes the relearn is usually not completed due to the software asking for the relearn procedure not being coded correctly

Not sure if the GM your experiencing it on would be similar.

If using hptuners to try the relearn use something else.
User avatar
decipha
Tooner
 
Posts: 20698
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Decipha Ponto
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Other Vehicle(s): Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer
06 Chrysler 300 AWD - Sharifa

Re: question concerning engine dyno test

Unread postby enginedynonoob » Fri Jul 31, 2020 11:02 pm

decipha wrote:On the ford coyotes the relearn is usually not completed due to the software asking for the relearn procedure not being coded correctly

Not sure if the GM your experiencing it on would be similar.

If using hptuners to try the relearn use something else.


I was using the GM MDI2.

And I have an extra question.
For the engine dyno vehicle emission test I don't have the BCM.
There is only the ECU and Chassis control module(don't remember the exact name... sorry) connected to the engine.

question:

1_ Can the  Crankshaft Position System Variation Not Learned(P0315) DTC pop up because the ECU is not reading the BCM?
enginedynonoob
General Poster
 
Posts: 9
Joined: Thu Jul 30, 2020 10:44 pm
Name: John
Vehicle Information: 2020 Chevrolet Express van G4500 cutaway

Re: question concerning engine dyno test

Unread postby decipha » Sat Aug 01, 2020 12:46 pm

no idea Im not sure what and where GM stores their profile correction
User avatar
decipha
Tooner
 
Posts: 20698
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Decipha Ponto
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Other Vehicle(s): Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer
06 Chrysler 300 AWD - Sharifa

Re: question concerning engine dyno test

Unread postby enginedynonoob » Mon Aug 03, 2020 1:23 am

decipha wrote:no idea Im not sure what and where GM stores their profile correction


Thank you. I have an other question.

I have a ECM just for engine dyno testing and I'm going to call it "Test ECM".
The "Test ECM" is the same and has the same calibration as the engine I am trying to do the engine dyno test. (Chevrolet Express van 4500 cutaway)
And I am not using the original vehicle ECM of the engine.
So I am going to use the "Test ECM" for the new engine engine dyno vehicle emission test.

Question.

Before pulling out the engine for the engine dyno test, can I connect the "Test ECM" on the vehicle of the new engine and do the Crankshaft Relearn?
So I won't have to do an other CKP relearn once the engine is on the dyno.
enginedynonoob
General Poster
 
Posts: 9
Joined: Thu Jul 30, 2020 10:44 pm
Name: John
Vehicle Information: 2020 Chevrolet Express van G4500 cutaway

Re: question concerning engine dyno test

Unread postby decipha » Mon Aug 03, 2020 11:05 am

yep no problem
User avatar
decipha
Tooner
 
Posts: 20698
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Decipha Ponto
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Other Vehicle(s): Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer
06 Chrysler 300 AWD - Sharifa


Return to GM Tuning

Who is online

Users browsing this forum: No registered users and 1 guest

cron