check engine
#1
check engine
My dad's 99 ranger 4.0L OHV had the check engine light come on. It threw a code "system lean (bank 1)" My dad also said it was running really rough. I checked it out and tried to see if any of the cylinders on the passenger side were not firing. I was thinking that maybe one of the injectors was not working so I cleared the code and drove it for awhile and it drove perfect, no missing, no more light. Has anybody had this problem. Only thing i can think is that the O2 sensor on is started to go bad. Any insight???
Thanks
Thanks
#3
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#7
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#9
Originally Posted by Fiveologyjay
It leep throwing the 171 and 174 lean code for both banks. I have swapped mass air meters with my truck, changed out the fuel filter, new pvc valve, and ran injector cleaner thru it. Nothing seems to help. Any more ideas?
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#12
I have had a very similar problem with my truck. It turned out that it was a vacum leak. I replaced the intake gaskets and it took care of it. Here is a link to a how to https://www.ranger-forums.com/forum2...ad.php?t=27084
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