Ask a Car Mechanic and Get Answers to Your Car Questions ASAP
Welcome to justanswer.com. My name is XXXXX XXXXX online automotive technician. I am reading your comments. I will be right with you. Thank You, Leon
Sorry connection problems fixed now
What is the Mazda doing?
i changed the injectors and a few miles later cel came on. codes ar p0172 and p0175. runs about the same idel is a little rough after driving to and from work. work is higher altitude then home and and it idels high with clutch in for a while then returns to normal
Have cleared the codes and did the codes come back in?
yes and i have disconnected the battery for like 10 min. always comes back after a couple cycles.i read somewhere that a pcm update is normal for cars with milage?
OK, Let me look into the codes. And see what i can find out with my pro books. I will be back, Leon
Is this a regular cab or cab plusXXXXXor 4
Are you there?
DTC P0172 bank 1 (Cylinder 1) and DTC P0175 bank 2 indicates the fuel/air ratio is too rich. The fuel trim system is at the lean correction limit.
This indicates a vacuum leak somewhere. Check for vacuum leaks and esp. around the MAF sensor. I am gathering some more data for you. I will be back on this afternoon.
Meanwhile, I am sending you some test, so when I come back on that I will have a direction to go in to start helping you diagnose the problem.
Thank you, Leon
thanks for the sugestions. i tried a different maf and air temp sensor. still sending the same codes. could it just be the o2 sensors not reading right
there is no vacuum leak. sprayed all around lines and intake. and wouldn;t a vac leak make it lean by getting to much air into the engine?
i just bought a actron cp9580a can i test with that thanks
Yes, you can read live data and send me o2 stats ( minimum and max volt reading and are they switching? ) And all the fuel trim readings. Along with the mass air flow readings. Engine at normal temp, running. Please and Thank you, Leon
ok so i have some numbers. these are at idle. one thing that seemed wierd was that i have looked at the scan tool a few times while its hooked up and this time it said fuel system open2. normally it says closed. then it gave the codes p1132 and p1152. ok back to readings
. Calc load %31. MAF .62 IAT108 eng temp 190 IGN ADV.10 ST FTRM1 %4.7 same for FTRM2. LT FTRM 1&2 0.0 O2S11 826-847 O2S12 879 - 897 O2S21 856-924. on the closed fuel system closed ST FTRM 1&2 bounce from -4 to +4 LT FTRM 1&2 -23. O2S11 .12-.900 O2S12 .678-.784 O221 .10-.897 the graph for O2S11 & O2S21 looked good up & down but O2S12 was choppy and what you might call lazy. thanks gene
anything on those numbers?
OK, LTFTRM -23 is in rich condition which correspond to the codes p1132 and p1152. 02's are not switching enough.
P1152 Mazda - HO2S-21 Rich Condition Correcting For Over Lean Condition.Possible causes- Large vacuum leak- Blocked or faulty fuel injector(s)- Fuel pump faulty- Faulty oxygen sensor- Blocked exhaustRead more: http://engine-codes.com/p1153_mazda.html#ixzz2bO9kwYKIRead more: http://engine-codes.com/p1152_mazda.html#ixzz2bO8vfOqwThere is either a big vacuum leak somewhere, faulty 02, or 02 sensor wiring problem.First we need to make sure to see if the EGR valve is not stuck open. This would cause a big vacuum leak internally. Before we continue with the 02 test.See both 02's are not switching and very rarely do they go out at the same time.So,
Do this test for me?: Remove EGR valve for me and inspect it to see if the pintle is open or closed.Let me know what you find out.
As long as the Fuel PSI is ok check the following in green
no egr. the codes p1132 and p1152 were only present for 45 min. what does fuel system open 2 mean? it very rarely switches to open. the 2 upstream o2 sensors are rich to lean fairly quick. the post cat o2 stays reading rich. is that right. thanks for the help. gene
ford 4.0 v6
i've seen the #2 pic but i was told that was for the vapor coming from the fuel tank. it runs to the throttle body
some b4000 didnt have them from what i've read
no it hasn't. i would just like my money back. thanks gene