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    Chevy Cruze 1.4 2017 Rich Condition
- Tanriverdiyev
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                3 weeks 3 days ago                #92292
        by Tanriverdiyev
    
    
        
 
Hello,
I need your support to understand what is wrong with my car. 1.4L Chevy Cruze II generation. Big fuel consuption, rich condition - LTFT 2% during iddle and apprx. - 25% acceleration. O2 tested and all okay (also was replaced with known good one). Injectors and GDI pump replaced ( oil also). Still reduced power and 14l per 100km in city.
In the attached screenshots in the top you can find purge valve command, rpm, tank pressure and LTFT.
    
 	
					
                    	
            			
							    
            
            
            
            
            
                                
    
                                                
    
        Chevy Cruze 1.4 2017 Rich Condition was created by Tanriverdiyev            
    Hello,
I need your support to understand what is wrong with my car. 1.4L Chevy Cruze II generation. Big fuel consuption, rich condition - LTFT 2% during iddle and apprx. - 25% acceleration. O2 tested and all okay (also was replaced with known good one). Injectors and GDI pump replaced ( oil also). Still reduced power and 14l per 100km in city.
In the attached screenshots in the top you can find purge valve command, rpm, tank pressure and LTFT.
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- Omega
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                3 weeks 2 days ago                #92293
        by Omega
    
    
            
            
            
            
            
                                
    
                                                
    
        Replied by Omega on topic Chevy Cruze 1.4 2017 Rich Condition            
    
        I’m not sure about anyone else but your pictures for me are coming through as just black boxes    
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- Tyler
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                3 weeks 2 days ago                #92294
        by Tyler
    
    
            
            
            
            
            
                                
    
                                                
    
        Replied by Tyler on topic Chevy Cruze 1.4 2017 Rich Condition            
    
        Sorry Tanriverdiyev, your screenshots didn't display correctly. I couldn't see that you uploaded or posted them incorrectly. Send them to me at wrenchturnsyou@gmail.com if you like and I can upload them again.
My first thought is an air measurement issue. There's actually a TSB out for it:
static.nhtsa.gov/odi/tsbs/2018/MC-10137584-9999.pdf
Since you already have a scan tool, the easiest test would be to compare the MAF Sensor reading against the Calculated Air Flow. There's no spec, but I like them to agree within .5 g/s at hot idle with no loads on.
    My first thought is an air measurement issue. There's actually a TSB out for it:
static.nhtsa.gov/odi/tsbs/2018/MC-10137584-9999.pdf
Since you already have a scan tool, the easiest test would be to compare the MAF Sensor reading against the Calculated Air Flow. There's no spec, but I like them to agree within .5 g/s at hot idle with no loads on.
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- Tanriverdiyev
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                3 weeks 2 days ago         -  3 weeks 2 days ago        #92295
        by Tanriverdiyev
    
    
    
            
            
            
            
                                
    
                                                
    
        Replied by Tanriverdiyev on topic Chevy Cruze 1.4 2017 Rich Condition            
    
        Thank you for your quick reply. It is first time and i though that I attach the files.    
    
        Last edit: 3 weeks 2 days ago  by Tanriverdiyev.            
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- Tanriverdiyev
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                3 weeks 2 days ago                #92296
        by Tanriverdiyev
    
    
        
    
            
            
            
            
            
                                
    
                                                
    
        Replied by Tanriverdiyev on topic Chevy Cruze 1.4 2017 Rich Condition            
    Sorry Tanriverdiyev, your screenshots didn't display correctly. I couldn't see that you uploaded or posted them incorrectly. Send them to me at wrenchturnsyou@gmail.com if you like and I can upload them again.
My first thought is an air measurement issue. There's actually a TSB out for it:
static.nhtsa.gov/odi/tsbs/2018/MC-10137584-9999.pdf
Since you already have a scan tool, the easiest test would be to compare the MAF Sensor reading against the Calculated Air Flow. There's no spec, but I like them to agree within .5 g/s at hot idle with no loads on.
Thank you in advance. I sent pictures to your email.
MAF on hot iddle is about 2.5- g/s. Today I will check air filter also.
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- Tyler
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                3 weeks 1 day ago         -  3 weeks 1 day ago        #92299
        by Tyler
    
    
 	
					
                    	
            			
							    
    
            
            
            
            
                                
    
                                                
    
        Replied by Tyler on topic Chevy Cruze 1.4 2017 Rich Condition            
    
    
        Last edit: 3 weeks 1 day ago  by Tyler.            
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- Noah
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- Give code definitions with numbers!
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                3 weeks 10 hours ago                #92301
        by Noah
    
    
            
"Ground cannot be checked with a 10mm socket"
    
            
            
            
            
            
                                
    
                                                
    
        Replied by Noah on topic Chevy Cruze 1.4 2017 Rich Condition            
    
        Is that the engine that has the air cleaner housing with the plastic disk that comes off and skews the MAF?    
            "Ground cannot be checked with a 10mm socket"
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- Tanriverdiyev
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                3 weeks 10 hours ago                #92303
        by Tanriverdiyev
    
    
        
Yesterday I put 4 used MAF sensors there and in 3 of them MAF readings were 2-2.5 g/s. With all 3 sensors LTFT was arround 7-10%. Only on one MAF I got 4g/s but then LTFT went to -30%. Today I disconnect plug from MAF and got LTFT +11%. Is it means that I need to change MAF?
    
            
            
            
            
            
                                
    
                                                
    
        Replied by Tanriverdiyev on topic Chevy Cruze 1.4 2017 Rich Condition            
    Yes it is. LE2Is that the engine that has the air cleaner housing with the plastic disk that comes off and skews the MAF?
Yesterday I put 4 used MAF sensors there and in 3 of them MAF readings were 2-2.5 g/s. With all 3 sensors LTFT was arround 7-10%. Only on one MAF I got 4g/s but then LTFT went to -30%. Today I disconnect plug from MAF and got LTFT +11%. Is it means that I need to change MAF?
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- Noah
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                3 weeks 9 hours ago                #92304
        by Noah
    
    
            
"Ground cannot be checked with a 10mm socket"
    
            
            
            
            
            
                                
    
                                                
    
        Replied by Noah on topic Chevy Cruze 1.4 2017 Rich Condition            
    
        I was thinking about this design, I have run into this before and Danner made a video about the same issue:
scannerdanner.com/scannerdanner-premium-...dy-james-danner.html
            scannerdanner.com/scannerdanner-premium-...dy-james-danner.html
"Ground cannot be checked with a 10mm socket"
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