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Nairaland Forum / Nairaland / General / Car Talk / Auto Guru, Please Help. (8667 Views)
Expert Advice Urgently Needed From The Auto Guru!!! / Guys My Vehicle Was Saved From An Incompetent Nairaland Auto Guru Mayor2013 / Guru's Please Help Me Read My Cars Mpg (2) (3) (4)
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Auto Guru, Please Help. by Deprofessional(m): 7:34pm On Oct 19, 2017 |
Does this broken hose have any negative effect on the engine?
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Re: Auto Guru, Please Help. by mayor2013: 8:21pm On Oct 19, 2017 |
Air fuel mixture would be in the wrong proportion (14.7:1). So there the ecu would use the wrong information to inject fuel into the combustion chamber there fore leading to high fuel consumption 3 Likes |
Re: Auto Guru, Please Help. by Deprofessional(m): 8:28pm On Oct 19, 2017 |
mayor2013: Thanks mayor. Like how much will it cost to replace it. |
Re: Auto Guru, Please Help. by HyundaiMechco: 8:34pm On Oct 19, 2017 |
Pls change d hose is not gud |
Re: Auto Guru, Please Help. by Deprofessional(m): 8:52pm On Oct 19, 2017 |
HyundaiMechco:where can I get it. can you assist? I wouldn't mind paying in advance? |
Re: Auto Guru, Please Help. by mayor2013: 9:33pm On Oct 19, 2017 |
Deprofessional: Brand new cost around 7k |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 10:28pm On Oct 19, 2017 |
mayor2013: not correct. This is a 1998-2001 toyota camry with a 4cylinder 5s-fe engine It employs the use of a manifold absolute pressure system for its primary regulation of air fuel ratio. There is no Mass airflow meter in the design. Deprofessional: engine will suck up air that is not filtered. The harmonics wil sound a little different. The positive crank ventilation unit will loose a little efficiency. Summary get a replacement. 2 Likes |
Re: Auto Guru, Please Help. by mayor2013: 10:39pm On Oct 19, 2017 |
GAZZUZZ: That's your feeling. Mine is different. Never said in my statement there was a mass airflow Sensor. Don't you fink the value there would be altered when you have ram air entering through that broken intake hose. My take on the above is simple and straightforward sir |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 10:48pm On Oct 19, 2017 |
mayor2013: still wrong. You should research more. Good night |
Re: Auto Guru, Please Help. by Inception(m): 11:03pm On Oct 19, 2017 |
GAZZUZZ: Unmetered air will still knock off the air-fuel ratio balance, which will still cause rough idle, missing and hesitation , asides unfiltered air. Also obvious would be vacuum leak issues . This in fact is what will affect the MAP sensor and will definitley cause incorrect info to the ECU. |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:06pm On Oct 19, 2017 |
Inception: unmetered air from? All air still comes in via throttle body. Infact remove all the plastic piping and run car without the filter box, you will have only unfiltered air. Dont forget to block off the evap line. ![]() |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:08pm On Oct 19, 2017 |
Inception: Very unlikely. |
Re: Auto Guru, Please Help. by Inception(m): 11:14pm On Oct 19, 2017 |
GAZZUZZ: But don't forget that u need the map sensor for the car to run. The air comes in as it is. What is really metered is the quantity of fuel supplied via injectors to the combustion chamber. Unfiltered air, yes. As long as what component removed is before the MAP sensor, then there should be no problem, asides damaging your engine with dirty air. |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:14pm On Oct 19, 2017 |
Inception: Vacuum lines are specic on this model. 1. From throttle body to evap purge valve. There will be no vacuum leak witout the airfilter box. You will not get a lean mixture code, you will not get a misfire code. |
Re: Auto Guru, Please Help. by Inception(m): 11:14pm On Oct 19, 2017 |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:17pm On Oct 19, 2017 |
Inception: lets agree on 1 thing. Map is mounted. On body of veicle and a pipe runs from far end of the intake to the MAP No sensor on this vehicles design monitors air volume. Agreed? |
Re: Auto Guru, Please Help. by mayor2013: 11:20pm On Oct 19, 2017 |
GAZZUZZ: What's the function of the map then? This analysis is quite funny though |
Re: Auto Guru, Please Help. by mayor2013: 11:20pm On Oct 19, 2017 |
Inception: Am on the same page with you |
Re: Auto Guru, Please Help. by Inception(m): 11:21pm On Oct 19, 2017 |
GAZZUZZ:True. The design actually measures manifold pressure(or would i say vacuum), not volume. |
Re: Auto Guru, Please Help. by mayor2013: 11:24pm On Oct 19, 2017 |
GAZZUZZ: Why unlikely. Have seen this cause stalling and rough idling, follow this on a bmw or MB at your own peril |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:34pm On Oct 19, 2017 |
mayor2013: Vacuum brother Vacuum. Now give it a rest. |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:35pm On Oct 19, 2017 |
Inception: 1 down 1 to go. ![]() |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:37pm On Oct 19, 2017 |
mayor2013: need a fresh lecture on this or you agree with me? |
Re: Auto Guru, Please Help. by LeJeun3: 11:43pm On Oct 19, 2017 |
Inception: We have had cases of non functioning map yet car runs fine..... 1 Like |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:45pm On Oct 19, 2017 |
LeJeun3: RR uses MAP and MAF at same time ![]() |
Re: Auto Guru, Please Help. by LeJeun3: 11:45pm On Oct 19, 2017 |
mayor2013: From engine bay, we can deduce that vehicle is either a nissan or toyota of the late 90s/ early 2000s.... |
Re: Auto Guru, Please Help. by LeJeun3: 11:49pm On Oct 19, 2017 |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:52pm On Oct 19, 2017 |
mayor2013: subject matter toyota camry 1998-2001 5s-fe I4 |
Re: Auto Guru, Please Help. by GAZZUZZ(m): 11:53pm On Oct 19, 2017 |
Deprofessional: LeJeun3: oya answer |
Re: Auto Guru, Please Help. by mayor2013: 1:15am On Oct 20, 2017 |
GAZZUZZ: Fuel consumption would be high. Still had a case at work this week. Torned intake air hose and had been patched previously customer came back after tuning up his engine. Found out the leak from the previous patched area by another engineer Prior to coming. When car is started in the morning it goes into limp home mode. Car came in back scanned ride and got a throttle actuator fault code. Said ride is a Honda Accord 2006 |
Re: Auto Guru, Please Help. by honmusa(m): 2:46am On Oct 20, 2017 |
GAZZUZZ:No sir I disagree ,you can get a lean code . watch https://www.youtube.com/watch?v=Ino4x5QvKnQ From the video u can see an evidence of vacuum leak and the engine managment system is still able to detect lean condition even wen the AFS is not even working. So how come ? The speed density fuel management system of a Camry 5s doest not only rely on only the map sensor data to supply the stoic equivalent amount of fuel injection for each amount of air ,It also takes data from TPS and other sensor.There is actually a preprogrammed algorithms inside the ecu that checks for all the sensors data to make a self diagnosis decision not based only the map sensor And how vacuum leak can cause engine performance issue is that is air leak will introduce more air into the intake system which will not be compensated by the fuel injection needed to balance the tps angle opening causing less fuel and more air (lean ) Vacuum leak in camry 5s engine will cause poor performance issue ,high rpm at idle and high fuel consumption . Practically,i have gotten many cases of camry 5S customer complaining of poor performance and high fuel consumption and the sole reason is cause of leaking air duct. Although Maf will be more affected than speed density but that it will not be affected at all is a capital No Finally ,the primary reason for map is not for fuel injection decision making only ,it also perform egr sensing |
Re: Auto Guru, Please Help. by obekediamondfuto(m): 4:11am On Oct 20, 2017 |
honmusa: the point of controversy is the idea if vacuum and air intake. map measures vacuum inside intake manifold (after tps) and maf measures air Intake ( before tps). note tps major role is opening sucking or allowing air inside intake manifold and closing. now this setup doesn't have a maf just map that measures the pressure inside intake manifold with precision. maf would meter and measure the air being sucked in. now with this ops issue of a broken or leaking AIR intake body I don't really see a lean code being thrown. all things being equal, tps et all. car would suck in the desired air and maintain absolute pressure in manifold and run normal albeit a little portion of the air being sucked in will be unfiltered (ops case as case study) pcv will be affected on the long run. my two cents |
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