SMOG Nightmare P1174 P1171
#11
Thank you for posting the solution. Too often people don't.
I don't recall ever hearing that cause during my several years on this and other forums.
How did the mechanic figure out the problem? I guess the smoke test did not reveal it because with your foot off the brake there was no leak.
I don't recall ever hearing that cause during my several years on this and other forums.
How did the mechanic figure out the problem? I guess the smoke test did not reveal it because with your foot off the brake there was no leak.
Last edited by mln01; 10-04-2016 at 05:58 PM.
#12
Thank you for posting the solution. Too often people don't.
I don't recall ever hearing that cause during my several years on this and other forums.
How did the mechanic figure out the problem? I guess the smoke test did not reveal it because with your foot off the brake there was no leak.
I don't recall ever hearing that cause during my several years on this and other forums.
How did the mechanic figure out the problem? I guess the smoke test did not reveal it because with your foot off the brake there was no leak.
#14
I like to see +/- 5% on the fuel trims. +/- 10% still won't set a code and sometimes that is the best we can get some cars, but it makes me uncomfortable. Anything over +/- 10% needs to be fixed, it will set a fault code.
So yes, your fuel trims are excessively lean.
Do yourself a favor. Get a DENSO or GENUINE air flow sensor. Denso # 197-6030 is the number (197-6020 will also fit)
Clear the codes. Disconnect the battery for about 30 minutes and swap the sensor in the meantime.
Drive the vehicle and after a day or two, re-evaluate the fuel trims.
I've been burned by so many aftermarket MAF sensors, I keep a Denso in stock, because I swap it out first thing before doing any other diagnostics.
So yes, your fuel trims are excessively lean.
Do yourself a favor. Get a DENSO or GENUINE air flow sensor. Denso # 197-6030 is the number (197-6020 will also fit)
Clear the codes. Disconnect the battery for about 30 minutes and swap the sensor in the meantime.
Drive the vehicle and after a day or two, re-evaluate the fuel trims.
I've been burned by so many aftermarket MAF sensors, I keep a Denso in stock, because I swap it out first thing before doing any other diagnostics.
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